Incorporation of Kojic Acid-Azo Dyes on TiO2 Thin Films for Dye Sensitized Solar Cells Applications

• Main Authors: Zie, Carolynne Wei Sie, Zainab, Ngaini
• Format: E-Article
• Language: English
• Published: Hindawi Publishing Corporation 2017
• Subjects: Q Science (General)
• Online Access: http://ir.unimas.my/id/eprint/17200/1/Incorporation%20of%20Kojic%20Acid-Azo%20Dyes%20%28abstract%29.pdf; http://ir.unimas.my/id/eprint/17200/; https://www.hindawi.com/journals/jse/2017/2760301/; https://doi.org/10.1155/2017/2760301

Sensitization of heavy metal free organic dyes onto TiO2 thin films has gainedmuch attention in dye sensitized solar cells (DSSCs). A series of new kojic acid based organic dyes KA�–� were synthesized via nucleophilic substitution of azobenzene bearing different vinyl chains A�–� with kojyl chloride �. Azo dyes KA�–� were characterized for photophysical properties employing absorption spectrometry and photovoltaic characteristic in TiO2 thin film. The presence of vinyl chain in A�–� improved the photovoltaic performance from 0.20 to 0.60%. The introduction of kojic acid obtained from sago waste further increases the efficiency to 0.82–1.54%. Based on photovoltaic performance, KA� achieved the highest solar to electrical energy conversion efficiency (