期刊
APPLIED PHYSICS LETTERS
卷 99, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3610553
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资金
- Research Grants Council of Hong Kong [CityU 101707]
We show that by introducing a polymerized fluorocarbon film (CFx) on indium tin oxide (ITO), stability of CuPc/C-60 organic photovoltaic device can be improved. While the efficiency of a standard device decreases from 1.5% to 0.7% after 2000 h of storage and intermittent operation, a CFx-buffered device shows negligible changes (1.6% throughout 2000 h). We found that C-60 is influenced by the ITO substrate. X-ray photoemission studies show that reactive -O degrees species on the ITO surface were minimized after CFx polymerization. Reduction of such species from organic layers is considered a major cause for the stability enhancement in the CFx-buffered device. (C) 2011 American Institute of Physics. [doi:10.1063/1.3610553]
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