期刊
CHEMPHYSCHEM
卷 10, 期 1, 页码 290-299出版社
WILEY-BLACKWELL
DOI: 10.1002/cphc.200800708
关键词
charge-carrier recombination; dye-sensitized solar cells; electron transport; impedance; nanocrystalline TiO(2)
资金
- Swiss National Science Foundation
- Taiwan Merit Scholarships [TMS 094-2A-026]
Electrochemical impedance spectroscopy (EIS) and transient voltage decay measurements are applied to compare the performance of dye sensitized solar cells (DSCs) using organic electrolytes, ionic liquids and organic-hole conductors as hole transport materials (HTM). Nano-crystalline titania films sensitized by the some heteroleptic ruthenium complex NaRu(4-carboxylic acid-4'-carboxylate) (4,4'-dinonyl-2,2'-bipyridyl)(NCS)(2), coded Z-907Na are employed as working electrodes. The influence of the nature of the HTM on the photovoltaic figures of merit, that is, the open circuit voltage, short circuit photocurrent and fill factor is evaluated. In order to derive the electron lifetime, as well as the electron diffusion coefficient and charge collection efficiency, EIS measurements are performed in the dark and under illumination corresponding to realistic photovoltaic operating conditions of these mesoscopic solar cells. A theoretical model is established to interpret the frequency response off the impedance under open circuit conditions, which is conceptually similar to photovoltage transient decay measurements. Important information on factors that govern the dynamics of electron transport within the nanocrystalline TiO(2) film and charge recombination across the dye sensitized heterojunction is obtained.
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