標題: Metal-free organic dyes for TiO2 and ZnO dye-sensitized solar cells
作者: Selopal, Gurpreet Singh
Wu, Hui-Ping
Lu, Jianfeng
Chang, Yu-Cheng
Wang, Mingkui
Vomiero, Alberto
Concina, Isabella
Diau, Eric Wei-Guang
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 7-Jan-2016
摘要: We report the synthesis and characterization of new metal-free organic dyes (namely B18, BTD-R, and CPTD-R) which designed with D-p-A concept to extending the light absorption region by strong conjugation group of p-linker part and applied as light harvester in dye sensitized solar cells (DSSCs). We compared the photovoltaic performance of these dyes in two different photoanodes: a standard TiO2 mesoporous photoanode and a ZnO photoanode composed of hierarchically assembled nanostructures. The results demonstrated that B18 dye has better photovoltaic properties compared to other two dyes (BTD-R and CPTD-R) and each dye has higher current density (J(sc)) when applied to hierarchical ZnO nanocrystallites than the standard TiO2 mesoporous film. Transient photocurrent and photovoltage decay measurements (TCD/TVD) were applied to systematically study the charge transport and recombination kinetics in these devices, showing the electron life time (T-R) of B18 dye in ZnO and TiO2 based DSSCs is higher than CPTD-R and BTD-R based DSSCs, which is consistent with the photovoltaic performances. The conversion efficiency in ZnO based DSSCs can be further boosted by 35%, when a compact ZnO blocking layer (BL) is applied to inhibit electron back reaction.
URI: http://dx.doi.org/10.1038/srep18756
http://hdl.handle.net/11536/129675
ISSN: 2045-2322
DOI: 10.1038/srep18756
期刊: SCIENTIFIC REPORTS
Volume: 6
起始頁: 0
結束頁: 0
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