- United Kingdom
A study was undertaken to examine the marketing system and price behavior of tilapia fish in selected areas of Mymensingh district of Bangladesh during the month of March-May 2012. The objectives of the study were to estimate costs and... more
A study was undertaken to examine the marketing system and price behavior of tilapia fish in selected areas of Mymensingh district of Bangladesh during the month of March-May 2012. The objectives of the study were to estimate costs and margins, seasonal price variation and to test market integration of Tilapia fish. Primary and secondary data were used for this study. The higher marketing cost was incurred by aratdars and the lowest by retailer. On the other hand, retailers earned the highest net marketing margins. Analysis of market integration shows that Tilapia fish market in Bangladesh was well integrated. The study identified some problems related to economic, technical, marketing, social and natural calamities aspects and suggested some measures for solving these problems. The findings of the study revealed that the marketing of tilapia was a profitable business and some recommendations were provided for the improvement of tilapia marketing in the country.
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ABSTRACT Control of morphology is essential in greenhouse production of poinsettia, which is among the largest and economically most important ornamental pot plant cultures worldwide. Plant growth regulators are used to reduce shoot... more
ABSTRACT Control of morphology is essential in greenhouse production of poinsettia, which is among the largest and economically most important ornamental pot plant cultures worldwide. Plant growth regulators are used to reduce shoot elongation but due to their potentially negative impacts on human health and the environment, it is highly desirable to replace these. Exploiting responses to light quality as an alternative has been investigated to a limited extent only in poinsettia and information about elongation-controlling hormones is scarce. In natural light an increased far-red (FR) proportion at the end of the day (EOD) is known to enhance shoot elongation in several species through action of phytochrome on hormone metabolism. The aim of this study was to assess the effect of manipulation of the phytochrome system at the EOD on elongation growth and hormone metabolism in poinsettia. Depending on cultivar, shoot elongation and internode lengths were reduced 34–54% by exposure to 30 min EOD-R compared to 30 min EOD-FR, both provided by light emitting diodes. The reduced elongation under EOD-R correlated with 29% and 21% lower levels of gibberellin and indole-3-acetic acid, respectively. Specific leaf and bract area were also significantly lower under EOD-R compared to EOD-FR. Bract formation and time to visible cyathia did not differ between the light treatments. In conclusion, manipulation of the phytochrome system by EOD-R in order to modulate the contents of the growth-controlling hormones can be a useful tool in control of shoot elongation in greenhouse-grown poinsettia in order to counteract the effect of the increased FR proportion at the EOD.
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This document is application for Fellow membership of Higher Education Academy in UK.
Page 1. Circuits Syst Signal Process (2010) 29: 11931205 DOI 10.1007/s00034-010-9200-x Hybrid Architecture and VLSI Implementation of the CosineFourierHaar Transforms Khan A. Wahid · MA Islam · Samia S. Shimu · Moon Ho Lee · Seok-Bum... more
Page 1. Circuits Syst Signal Process (2010) 29: 11931205 DOI 10.1007/s00034-010-9200-x Hybrid Architecture and VLSI Implementation of the CosineFourierHaar Transforms Khan A. Wahid · MA Islam · Samia S. Shimu · Moon Ho Lee · Seok-Bum Ko ...
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Trace metals concentration and proximate composition of raw and boiled silver pomfret (Pampus argenteus) from coastal area and retail market were determined to gain the knowledge of the risk and benefits associated with indiscriminate... more
Trace metals concentration and proximate composition of raw and boiled silver pomfret (Pampus argenteus) from coastal area and retail market were determined to gain the knowledge of the risk and benefits associated with indiscriminate consumption of marine fishes. The effects of cooking (boiling) on trace metal and proximate composition of silver pomfret fish were also investigated. Trace element results were determined by the Energy Dispersive X-ray Fluorescence (EDXRF) Spectrometer wherein fish samples from both areas exceeded the standard limits set by FAO/WHO for manganese, lead, cadmiumm and chromium and boiling has no significant effects on these three metal concentrations. Long-term intake of these contaminated fish samples can pose a health risk to humans who consume them.
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ABSTRACT Coccidiosis in chickens is one of the major problems of poultry industry that is caused by protozoan parasites of genus Eimeria . Present study was conducted to characterize the Eimeria species infecting poultry in different... more
ABSTRACT Coccidiosis in chickens is one of the major problems of poultry industry that is caused by protozoan parasites of genus Eimeria . Present study was conducted to characterize the Eimeria species infecting poultry in different regions of Chittagong district of Bangladesh. Seven species of Eimeria including E. tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti, E. mitis, and E. praecox have been characterized using conventional PCR analysis through amplifying unique single copy sequences derived from sequence characterized amplified region (SCAR) markers. The present study is the first of its type to use molecular tools to identify Eimeria spp. infecting chicken in Bangladesh. The study indicates that the modern molecular technique involving PCR to detect the Eimeria species are more reliable and accurate than the traditional morphology-based technique.
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... Saim Emin Corresponding Author Contact Information , a , E-mail The Corresponding Author , Surya P. Singh 1 , a , Liyuan Han Corresponding Author Contact Information , a , E-mail The Corresponding Author , Norifusa Satoh 1 , a and... more
... Saim Emin Corresponding Author Contact Information , a , E-mail The Corresponding Author , Surya P. Singh 1 , a , Liyuan Han Corresponding Author Contact Information , a , E-mail The Corresponding Author , Norifusa Satoh 1 , a and Ashraful Islam 1 , a. ...
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There has been an increasing interest in dye-sensitized nano-crystalline TiO2 solar cells (DSCs) owing to their high efficiency and a possibility of low-cost production of such devices.13 The most efficient metal complex photosensitizers... more
There has been an increasing interest in dye-sensitized nano-crystalline TiO2 solar cells (DSCs) owing to their high efficiency and a possibility of low-cost production of such devices.13 The most efficient metal complex photosensitizers employed so far in DSCs ...
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The exchange of Fe(3+), Tb(3+), In(3+), Ga(3+), and Al(3+) between the C-terminal metal-binding site of the serum iron transport protein transferrin and the low-molecular-mass serum chelating agent citrate has been studied at pH 7.4 and... more
The exchange of Fe(3+), Tb(3+), In(3+), Ga(3+), and Al(3+) between the C-terminal metal-binding site of the serum iron transport protein transferrin and the low-molecular-mass serum chelating agent citrate has been studied at pH 7.4 and 25 degrees C. The removal of Ga(3+), In(3+), and Al(3+) follows simple saturation kinetics with respect to the citrate concentration. In contrast, removal of both Fe(3+) and Tb(3+) shows a combination of saturation and first-order kinetic behavior with respect to the citrate concentration. The saturation component is consistent with a mechanism for metal release in which access to the bound metal is controlled by a rate-limiting conformational change in the protein. The first-order kinetic pathway is very rapid for Tb(3+), and this is attributed to a direct attack of the citrate on the Tb(3+) ion within the closed protein conformation. It is suggested that this pathway is more readily available for Tb(3+) because of the larger coordination number for this cation and the presence of an aquated coordination site in the Tb(3+)-CO(3)-Tf ternary complex. There is relatively little variation in the k(max) values for the saturation pathway for Tb(3+), Ga(3+), Al(3+), and In(3+), but the k(max) value for Fe(3+) is significantly smaller. It is suggested that protein interactions across the interdomain cleft of transferrin largely control the release of the first group of metal ions, while the breaking of stronger metal-protein bonds slows the rate of iron release. The rates of metal binding to apotransferrin are clearly controlled in large part by the hydrolytic tendencies of the free metal ions. For the more amphoteric metal ions Al(3+) and Ga(3+), there is rapid protein binding, and the addition of citrate actually retards this reaction. In contrast, the nonamphoteric In(3+) ion binds very slowly in the absence of citrate, presumably due to the rapid formation of polymeric In-hydroxo complexes upon addition of the unchelated metal ion to the pH 7.4 protein solution. The addition of citrate to the reaction accelerates the binding of In(3+) to apoTf, presumably by forming soluble, mononuclear In-citrate complexes.
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A universally useful idea for preparing high quality perovskite films is proposed by retarding the crystallization of PbI2, which make possible highly reproducible planar structured perovskite solar cells.
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ABSTRACT The world is moving into a new era, the Go Green Revolution (GGR) because of the earth's current global warming and rising seas. Photovoltaic (PV) has the highest cost reduction potential among all renewable energy... more
ABSTRACT The world is moving into a new era, the Go Green Revolution (GGR) because of the earth's current global warming and rising seas. Photovoltaic (PV) has the highest cost reduction potential among all renewable energy sources (RES) and has experienced rapid growth. To design efficient policy instruments, one needs knowledge about what challenges face the growth of the new technology. The purpose of this study is to analyze the growth and the declining factors of Japanese PV market during 1990–2008. In order to understand the causes that hindering the diffusion of the PV business, comparative case studies of Japan and German PV sector was performed. The termination of incentive policy is the key reason for the Japanese PV market decline. German policy is long term and the incentives are more generous than Japanese incentive program. Moreover, Japanese environmental policy is not favourable for the growth of the renewable energy. Another reason is the firm's lack of future plan for increasing production capacity. The termination of incentive policy is the main blocking factor of the decline of PV market in Japan.
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A combination of squaraine-based dyes ( and ) and a ruthenium-based dye () were chosen as co-sensitizers to construct efficient dye-sensitized solar cells. The co-sensitization of squaraine dyes with enhanced their light-harvesting... more
A combination of squaraine-based dyes ( and ) and a ruthenium-based dye () were chosen as co-sensitizers to construct efficient dye-sensitized solar cells. The co-sensitization of squaraine dyes with enhanced their light-harvesting properties as a result of the broad spectral coverage in the region 350-800 nm. The co-sensitized solar cells based on + showed the highest short circuit current density of 17.10 mA cm(-2), an open circuit voltage of 0.66 V and a fill factor of 0.73, resulting in the highest power conversion efficiency of 8.2%, which is higher than that of the dye-sensitized solar cells based on the individual and dyes. The high power conversion efficiency of + was ascribed to its good light-harvesting properties, which resulted from its broader incident photon current conversion spectrum than that of the individual dyes. The high electron life time and electron recombination, which were the main causes of the higher efficiency of the device, were successfully analysed an...
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Radiative and non-radiative processes of excited CT states of Ru(II) and Pt(II) compounds and excited dd states of Rh(III) compounds in the solid state and at higher temperatures are examined. A rapid non-radiative transition of a... more
Radiative and non-radiative processes of excited CT states of Ru(II) and Pt(II) compounds and excited dd states of Rh(III) compounds in the solid state and at higher temperatures are examined. A rapid non-radiative transition of a metal-to-ligand charge transfer excited ...
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Third-generation solar cells are understood to be the pathway to overcoming the issues and drawbacks of the existing solar cell technologies. Since the introduction of graphene in solar cells, it has been providing attractive properties... more
Third-generation solar cells are understood to be the pathway to overcoming the issues and drawbacks of the existing solar cell technologies. Since the introduction of graphene in solar cells, it has been providing attractive properties for the next generation of solar cells. Currently, there are more theoretical predictions rather than practical recognitions in third-generation solar cells. Some of the potential of graphene has been explored in organic photovoltaics (OPVs) and dye-sensitized solar cells (DSSCs), but it has yet to be fully comprehended in the recent third-generation inorganic-organic hybrid perovskite solar cells. In this review, the diverse role of graphene in third-generation OPVs and DSSCs will be deliberated to provide an insight on the prospects and challenges of graphene in inorganic-organic hybrid perovskite solar cells.
Dye sensitized solar cells (DSSCs) based on a donor-acceptor-donor oligothienylene dye containing benzothiadiazole (T4BTD-A) were co-sensitized with dyes containing cis configured squaraine rings (HSQ3 and HSQ4). The co-sensitized dyes... more
Dye sensitized solar cells (DSSCs) based on a donor-acceptor-donor oligothienylene dye containing benzothiadiazole (T4BTD-A) were co-sensitized with dyes containing cis configured squaraine rings (HSQ3 and HSQ4). The co-sensitized dyes showed incident monochromatic photon-to-current conversion efficiency (IPCE) greater than 70 % in the 300 - 850 nm wavelength region. The individual overall conversion efficiencies of the sensitizers T4BTD-A, HSQ3 and HSQ4 were 6.4 %, 4.8 % and 5.8 %, respectively. Improved power conversion efficiencies of 7.0 % and 7.7 % were observed when T4BTD-A was co-sensitized with HSQ3 and HSQ4, respectively, thanks to a significant increase in current density (JSC) for the co-sensitized DSSCs. Intensity-modulated photovoltage spectroscopy results showed a longer lifetime for co-sensitized T4BTD-A+HSQ3 and T4BTD-A+HSQ4 compared to that of HSQ3 and HSQ4, respectively.
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The present paper discusses the strategy for improvement of efficiency of dye-sensitized solar cells based the equivalent circuit model. The influence of these elements upon cell efficiency in areas such as short circuit current density... more
The present paper discusses the strategy for improvement of efficiency of dye-sensitized solar cells based the equivalent circuit model. The influence of these elements upon cell efficiency in areas such as short circuit current density (JSC), open circuit voltage (VOC), and fill factor (FF) was examined. It was demonstrated that the haze factor of TiO2 electrodes is a useful index when fabricating light-confined TiO2 electrodes to improve JSC, and that blocking the TiO2 surface with molecules is an effective way of reducing interfacial charge recombination at the TiO2 surface and of improving shunt resistance and VOC. FF was also improved by reduction of the internal series resistance, which is composed of the redox reaction resistance at the platinum counter electrode, the resistance of carrier transport by ions in the electrolyte, and resistance due to the sheet resistance of the transparent conducting oxide. Finally, the highest efficiency scores of 11.1% and 10.4% (aperture illumination area of 0.219cm2 and 1.004cm2, respectively) were confirmed by a public test center.
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ABSTRACT A new series of donor-π-acceptor organic dyes based on thieno[3,2-a]carbazole as a new donor moiety, designated as JH-dyes, has been synthesized for dye-sensitized solar cells (DSCs). The photophysical properties and DSC... more
ABSTRACT A new series of donor-π-acceptor organic dyes based on thieno[3,2-a]carbazole as a new donor moiety, designated as JH-dyes, has been synthesized for dye-sensitized solar cells (DSCs). The photophysical properties and DSC performances of JH-dyes have been characterized. Among the three JH-dyes, a high power conversion efficiency (η) of 8.04% with a short-circuit current (Jsc) of 14.08 mA cm-2 and an open-circuit voltage (Voc) of 0.78 V has been achieved for DSC based on JH03 bearing hexyl chains on the terthiophene π-linker. The electrochemical impedance spectra (EIS) and intensity-modulated photovoltage spectroscopy (IMVS) of JH-cells were measured to understand the effect of molecular structure on charge transfer process and electron life time.
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A tetrathiafulvalene derivative (TTF-1) was introduced into perovskite solar cells as a dopant-free hole-transporting material, yielding an efficiency over 11%.
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We have investigated the adsorption stability of ruthenium N749 dye [black dye (BD)], a highly efficient dye for dye-sensitized solar cells (DSCs), through protonated and deprotonated carboxyl group anchors on a TiO2 anatase (101) surface... more
We have investigated the adsorption stability of ruthenium N749 dye [black dye (BD)], a highly efficient dye for dye-sensitized solar cells (DSCs), through protonated and deprotonated carboxyl group anchors on a TiO2 anatase (101) surface by using first-principles calculations. Geometry optimizations of the surface system with a supercell and the UV-visible spectrum calculation of the optimized dye structure were carried out. Among the configurations with one and two anchors, the BD adsorption anchored with one protonated carboxyl group was found to be the most stable, in contrast to most previous reports. Hydrogen bonding between the proton retained in BD and the surface oxygen is responsible for the stability of the protonated anchor. We confirmed that the calculated UV-visible spectrum of the most stable dye structure shows the best consistency with the experimental data. It is also demonstrated that the electronic density of states largely depends on the proton position. This no...
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Perovskite solar cells have showed high photovoltaic performance but suffer from low reproducibility, which is mainly caused by low uniformity of the active perovskite layer in the devices. The nonuniform perovskites further limit the... more
Perovskite solar cells have showed high photovoltaic performance but suffer from low reproducibility, which is mainly caused by low uniformity of the active perovskite layer in the devices. The nonuniform perovskites further limit the fabrication of large size solar cells. In this work, we control the morphology of CH3NH3PbI3 on mesoporous TiO2 substrate by employing consecutive anti-solvent dripping and solvent vapor fumigation during the spin-coating of precursor solution. The solvent vapor treatment is found to enhance the perovskite pore-filling and increase the uniformity of CH3NH3PbI3 in the porous scaffold layer, but slightly decrease the uniformity of perovskite capping layer. An additional anti-solvent dripping is employed to recover the uniform perovskite capping layer. Such consecutive morphology controlling operations (MCOs) lead to highly uniform perovskite in both porous and capping layers. By using the optimized perovskite deposition procedure, the reproduc-ibility of...
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... M. Ashraful Islam Mollaa, Mithun Sarkera and AKM Fazle Kibriab ... Recently, it has been reported that on alloying of Mo with Ni, hydrogen evolution efficiency of Ni electrode remarkably increased (Raj and Venkatesan, 1998 and... more
... M. Ashraful Islam Mollaa, Mithun Sarkera and AKM Fazle Kibriab ... Recently, it has been reported that on alloying of Mo with Ni, hydrogen evolution efficiency of Ni electrode remarkably increased (Raj and Venkatesan, 1998 and Kawashima et al. 1999). ...
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ABSTRACT doi: 10.1021/acs.jpcc.5b04629
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ABSTRACT Two novel heteroleptic Ru[3+2+1] sensitizers, 1 and 2, with unsymmetrical bipyridine as ancillary ligand and electron donating 4-methylstyryl group in the anchoring π-extended terpyridyl ligand were synthesized and characterized.... more
ABSTRACT Two novel heteroleptic Ru[3+2+1] sensitizers, 1 and 2, with unsymmetrical bipyridine as ancillary ligand and electron donating 4-methylstyryl group in the anchoring π-extended terpyridyl ligand were synthesized and characterized. DFT studies reveal that the lowest unoccupied molecular orbital (LUMO) is distributed over the terpyridine. The two new sensitizers showed an improvement in the molar extinction coefficient compared to reference standard N749 dye. Among the two new sensitizers, 1 exhibited maximum solar to electric conversion efficiency (η) of 5.19% with short circuit current density of 14.032 mA cm−2, open circuit voltage of 0.520 V and fill factor of 0.712, under Air Mass (AM) 1.5 sunlight, while the reference N749 sensitized solar cell exhibited η-value of 6.44%.
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We report a simple methodology for the selective deposition of an insulating layer on the nanoparticulate TiO2 (np-TiO2 ) mesoporous layer of perovskite solar cells. The deposited MgO insulating layer mainly covered the bottom part of the... more
We report a simple methodology for the selective deposition of an insulating layer on the nanoparticulate TiO2 (np-TiO2 ) mesoporous layer of perovskite solar cells. The deposited MgO insulating layer mainly covered the bottom part of the np-TiO2 layer with less coverage at the top. The so-called quasi-top-open structure is introduced to act as an efficient hole-blocking layer to prevent charge recombination at the physical contact of the transparent conducting oxide with the perovskite. This leads to an open-circuit voltage higher than that of the reference cell with a compact TiO2 hole-blocking layer. Moreover, such a quasi-top-open structure can facilitate the electron injection from perovskite into the np-TiO2 mesoporous layer and improve the spectral response at longer wavelength because of the less covered insulating layer at the top. This work provides an alternative way to fabricate perovskite solar cells without the need to use a conventional compact TiO2 layer.
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A high-quality mixed-organic-cation perovskite (MA)x (FA)1- x PbI3 is prepared from a phase-pure non-stoichiometric intermediate complex (FAI)1- x -PbI2 . The phase-pure (FAI)1- x -PbI2 probably facilitates homogenous nucleation and... more
A high-quality mixed-organic-cation perovskite (MA)x (FA)1- x PbI3 is prepared from a phase-pure non-stoichiometric intermediate complex (FAI)1- x -PbI2 . The phase-pure (FAI)1- x -PbI2 probably facilitates homogenous nucleation and modulates the growth kinetics during the crystallization of (MA)x (FA)1- x PbI3 . This strategy can be expected to pave the way for the development of mixed-organic-cation perovskite solar cells.
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ABSTRACT Two D-π-A organic sensitizers SPSGOD3 and SPSGOD4 differing in anchoring groups (cyanoacrylic acid & rhodanine-3-acetic acid) but with common donor (N-(9,9-dihexyl-9H-fluoren-2-yl)-9,9-dihexyl-N-phenyl-9H-fluoren-2-amine)... more
ABSTRACT Two D-π-A organic sensitizers SPSGOD3 and SPSGOD4 differing in anchoring groups (cyanoacrylic acid & rhodanine-3-acetic acid) but with common donor (N-(9,9-dihexyl-9H-fluoren-2-yl)-9,9-dihexyl-N-phenyl-9H-fluoren-2-amine) and π- spacer (furan) have been designed and synthesized for dye-sensitized solar cells (DSSCs). The sensitizers are fully characterized by 1H NMR, 13C NMR, MS and IR spectroscopy techniques. Photophysical, photovoltaic and electrochemical properties of these dyes were investigated. The dye with cyanoacrylic acid anchor (SPSGOD3) for test cell showed maximum IPCE of 79% at 485 nm, where as the dye with rhodanine-3-acetic acid anchor (SPSGOD4) reached maximum IPCE of 67% at 536 nm. The overall power conversion efficiency (η) of DSSCs sensitized with SPSGOD3 and SPSGOD4 were 6.21% and 3.78% respectively. The higher efficiency of SPSGOD3 is resulting from higher values of open circuit voltage (Voc) and fill factor (FF).
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A hybrid interfacial layer of ultrathin NiO/meso-Al2O3 with minimal optical/recombination losses, leads to solid performance improvement of inverted perovskite solar cells.
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We designed and developed a new class of thiocyanate-free cyclometalated ruthenium sensitizers for sensitizing nanocrystalline TiO2solar cells. This complex shows appreciably broad absorption range. Anchoring to nanocrystalline TiO2films... more
We designed and developed a new class of thiocyanate-free cyclometalated ruthenium sensitizers for sensitizing nanocrystalline TiO2solar cells. This complex shows appreciably broad absorption range. Anchoring to nanocrystalline TiO2films for light to electrical energy conversion in regenerative photoelectrochemical cells achieves efficient sensitization to TiO2electrode. With this new sensitizer, there were a power conversion efficiency of 4.76%, a short-circuit photocurrent density of 11.21 mA/cm2, an open-circuit voltage of 0.62 V, and a fill factor of 0.68 obtained under standard AM 1.5 sunlight.
The world is moving into a new era, the Go Green Revolution (GGR) because of the earth's current global warming and rising seas. Photovoltaic (PV) has the highest cost reduction potential among all renewable energy sources (RES) and... more
The world is moving into a new era, the Go Green Revolution (GGR) because of the earth's current global warming and rising seas. Photovoltaic (PV) has the highest cost reduction potential among all renewable energy sources (RES) and has experienced rapid growth. To design efficient policy instruments, one needs knowledge about what challenges face the growth of the new technology. The purpose of this study is to analyze the growth and the declining factors of Japanese PV market during 1990–2008. In order to understand the causes that hindering the diffusion of the PV business, comparative case studies of Japan and German PV sector was performed. The termination of incentive policy is the key reason for the Japanese PV market decline. German policy is long term and the incentives are more generous than Japanese incentive program. Moreover, Japanese environmental policy is not favourable for the growth of the renewable energy. Another reason is the firm's lack of future plan f...
Research Interests:
ABSTRACT The complexes [NBu4]2n[cis-Ru(H2 − ndcphen)2X2 (n = 0 or 1; H2dcphen; = 4,7-dicarboxy-1,10-phenanthroline; X = Cl, CN or SCN) were synthesized and spectroscopically characterized as a new class of photosensitizers. The energy... more
ABSTRACT The complexes [NBu4]2n[cis-Ru(H2 − ndcphen)2X2 (n = 0 or 1; H2dcphen; = 4,7-dicarboxy-1,10-phenanthroline; X = Cl, CN or SCN) were synthesized and spectroscopically characterized as a new class of photosensitizers. The energy levels of the LUMO and HOMO of cis-[Ru(H2dcphen)2(NCS)2] were estimated to be −1.02 and 0.89 V (vs. SCE), respectively, slightly more positive than those of [NBu4]2n[cis-Ru(H2 − ndcbpy)2(NCS)2] (n = 0 or 1; H2dcbpy = 4,4′-dicarboxy-2,2′-bipyridine). A more intense and broader MLCT absorption of [NBu4]2n[cis-Ru(H2 − ndcphen)2(NCS)2] (n = 0 or 1) than that of [NBu4]2n[cis-Ru(H2 − ndcbpy)2(NCS)2] (n = 0 or 1) was observed in ethanol solution at around 525 nm in the visible region. It is demonstrated that the new complexes act as efficient light harvesting antennae for dye-sensitized solar cells. A [NBu4]2n[cis-Ru(Hdcphen)2(NCS)2] sensitized nanocrystalline TiO2 film shows a remarkable solar light to electrical power conversion efficiency of 6.1% at 100 mW cm−2 of AM 1.5.