期刊
SCIENCE CHINA-CHEMISTRY
卷 55, 期 5, 页码 755-759出版社
SCIENCE PRESS
DOI: 10.1007/s11426-012-4512-2
关键词
polymer solar cells; inverted device structure; ZnO thin films
资金
- National Natural Science Foundation of China [50828301]
- NSFC [50990065, U0634003, 60937001]
- 973 project [2009CB623604]
A solution-processed zinc oxide (ZnO) thin film as an electron collection layer for polymer solar cells (PSCs) with an inverted device structure was investigated. Power conversion efficiencies (PCEs) of PSCs made with a blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C-61-butyric acid methyl ester (PCBM) are 3.50% and 1.21% for PSCs with and without the ZnO thin film, respectively. Light intensity dependence of the photocurrent and the capacitance-voltage measurement demonstrate that the increased PCEs are due to the restriction of the strong bimolecular recombination in the interface when a thin ZnO layer is inserted between the polymer active layer and the ITO electrode. These results demonstrate that the ZnO thin film plays an important role in the performance of PSCs with an inverted device structure.
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