期刊
NANO LETTERS
卷 12, 期 9, 页码 4925-4931出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl302509q
关键词
Dye-sensitized solar cells; solid state; oxygen reduction; titanium dioxide; hole conductor; p-doping; light soaking
类别
资金
- Victorian State Government Department of Primary Industry (SERD Program, Victorian Organic Solar Cells Consortium)
- Victorian Science Agenda (VSA)
- Australian Research Council through an Australian Research Fellowship
- Commonwealth Scientific and Industrial Research Organization through an OCE Science Leader position
- Commonwealth of Australia
- Victorian Government
Solid state dye-sensitized solar cells (sDSCs) employing the hole conductor 2,2'7,7'-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9'-spiro-bifluorene (spiro-MeOTAD) require the presence of oxygen during fabrication and storage. In this paper, we determine the concentrations of oxidized spiro-MeOTAD within devices under different operating and storage conditions by UV-vis spectroscopy. Relative concentrations of spiro-MeOTAD(+) were found to be greater than 10% after illumination for standard sDSCs, where no chemical dopant had been used in the solar cell fabrication but oxygen and lithium ions were present. We suggest that oxidized spiro-MeOTAD is created as a byproduct of oxygen reduction at the TiO2 surface during cell illumination. Furthermore, we studied the effect of light soaking under different conditions and associated changes in spiro-MeOTAD(+) concentration on the solar cell measurements. Our findings give insights to photochemical reactions occurring within sDSCs and provide guidelines for which doping levels should be used in device fabrication in absence of oxygen.
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