Identifying effects of TiO2 nanowires inside bulk heterojunction organic photovoltaics on charge diffusion and recombination

被引：12
作者：
Yang, P. [1 ,2 ]
Zeigler, D. F. [3 ]
Bryant, K. C. [3 ]
Martin, T. R. [1 ,2 ]
Gamelin, D. R. [3 ]
Luscombe, C. K. [1 ,2 ]
机构：
[1] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA
[2] Univ Washington, Mol Engn & Sci Inst, Seattle, WA 98195 USA
[3] Univ Washington, Dept Chem, Seattle, WA 98195 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2014年 / 2卷 / 25期
基金：
美国国家科学基金会;
关键词：
SENSITIZED SOLAR-CELLS; ELECTRON-TRANSPORT; PERFORMANCE; MORPHOLOGY; SPECTROSCOPY; EFFICIENCY; IMPEDANCE; NANOTUBES; NANORODS; MOBILITY;
D O I：
10.1039/c4tc00563e
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The charge carrier dynamics of poly(3-hexylthiophene) (P3HT):[ 6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) organic bulk-heterojunction photovoltaics with and without TiO2 nanowires are studied. Using inorganic nanowires as electron transport pathways improves the charge transit time and electron diffusion coefficient, which is the origin of fill factor and power conversion efficiency improvement observed in these devices. Through further comparison of devices with surface-modified nanowires (PCB-TiO2-NW), it is found that under AM 1.5 light illumination, charge recombination is dominant in the organic layer rather than at the TiO2 nanowire surface.
引用
收藏
页码：4922 / 4927
页数：6
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