期刊
APPLIED PHYSICS LETTERS
卷 96, 期 26, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3456530
关键词
buffer layers; electrochemical electrodes; lithium compounds; polymer films; semiconductor heterojunctions; solar cells; X-ray photoelectron spectra
资金
- Academia Sinica
- Ministry of Education
- National Science Council in Taiwan
The effects of cathode buffer layers on the bulk-heterojunction solar cells are investigated. Comparing with the device without buffer layer, obvious enhancements of V(oc) from 0.38 to 0.65 V and fill factor from 44% to 63% have been achieved by using 2 nm bathocuproine layer, which make the efficiency of the devices improved from 1.63% to 4.11%. Alternatively, lithium fluoride and/or tris(8-hydroxyquinolinato) aluminum were also introduced for clarification purpose. X-ray photoelectron spectroscopy study indicates that the degradation caused by the outer diffusion of carbon from active layers plays a crucial role in the device performance. (C) 2010 American Institute of Physics. [doi:10.1063/1.3456530]
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