Wahyu Indayani

Nanocrystal N-doped TiO2 as photoanode material in the dye-sensitized solar cell has been successfully characterized and analyzed. The anatase phase of N-doped TiO2 synthesized by co-precipitation method. TiCl3 as a precursor mixed with ammonia solution with various concentrations, namely, 2, 5 and 7.5%, and calcinated at temperature 400°C over 3 hours. X-ray diffraction (XRD) and UV-Vis spectroscopy were performed to analyze a crystal size and band gap of the samples. The XRD data showed that the crystal size of N-doped TiO2 was 7.4 − 9.9 nm and the measured band gap around 2.64 eV, respectively. I-V characterization of solar cell module shown that the highest power conversion efficiency was the solar cell module that fabricated with 7.5% of ammonia solution with the short circuit current (Jsc) and the efficiency was at 0.784 mA/cm−2 and 0,18%, respectively.

Pengaruh penambahan gold nanopartikel pada sel surya tersensitasi kuantum-dot CdSe telah berhasil diinvestigasi. Gold nanopartikel ditambahkan pada kuantum dot CdSe sebelum digunakan sebagai sensitizer. Absorbansi, transmitansi, dan pita energi dari sensitizer diukur dengan menggunakan spektrometer UV-Vis. Hasil pengujian menunjukkan bahwa penambahan gold nanopartikel dapat meningkatkan absorbansi dari sensitizer kuantum-dot CdSe. Pada penelitian ini, QDSCs disusun dengan struktur lapisan yang terdiri dari TiO2 sebagai fotoanode, gold nanopartikel dan kuantum dot CdSe sebagai sensitizer, KI sebagai elektrolit dan karbon black sebagai elektroda pembanding. Penambahan gold nanopartikel pada sensitizer meningkatkan rata-rata efisiensi dari QDSCs sebesar 108%. =========================================================================================================== The influence of addition of gold nanoparticles on quantum-dot CdSe sensitized solar cells has been investigated. Gold nan...