期刊
RSC ADVANCES
卷 3, 期 44, 页码 22412-22420出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra42537a
关键词
-
资金
- Greek national funding through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) [Thales K.A. 70/3/11676]
- European Commission [229927]
- Ministry of Education
- Special Research Account University of Crete
- GSRT
- DST [CS-83/2012]
A combination of a meso substituted zinc-porphyrin with two pyridyl groups and two benzoate groups at cis positions to each other (POR) with a mononuclear ruthenium(II) complex containing a 2,6-bis(1-methylbenzimidazol-2-yl)pyridine ligand and a carboxylic acid functionalized terpyridine ligand (SPS-G3) has been used as co-sensitizing system for the fabrication of dye-sensitized solar cells (DSSCs). The POR/SPS-G3 co-sensitized solar cell with a TiO2 photoanode displays enhanced short circuit current, open circuit voltage, and fill factor values (J(sc) = 16.18 mA cm (-2), V-oc = 0.64 V, FF = 0.71, respectively), resulting in an overall power conversion efficiency (PCE) of 7.35%, which is superior to that for the DSSCs based on the individual dyes POR and SPS-G3. This is attributed to the improved light harvesting efficiency of the POR/SPS-G3 co-sensitizing system, which is evidenced by the incident photon-to-current efficiency (IPCE) spectrum of the co-sensitized solar cell. Further improvement of the PCE value of the co-sensitized solar cell (up to 8.15%) has been achieved by using a graphene modified TiO2 (G-TiO2) photoanode, instead of a pure TiO2 photoanode. Based on dark current measurements and electrochemical impedance spectra (EIS), the increased PCE value of the solar cell with the G-TiO2 photoanode can be attributed to suppression of charge recombination at the photoanode/dye/electrolyte interface and enhancement of electron transport in the photoanode. These results are in accordance with the longer electron lifetime exhibited by the G-TiO2 photoanode.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据