期刊
APPLIED PHYSICS LETTERS
卷 101, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4749813
关键词
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资金
- NSERC-USRA award
- Canada Research Chair (CRC)
- Ontario Ministry of Research and Innovation
- NSERC-Discovery Grant
We investigated the physical processes underlying the degradation of poly(3-hexyl-thiophene): phenyl-C-61-butyric acid methyl ester (P3HT:PCBM) photovoltaics under harsh environmental conditions during a 70-70-70 test (70% humidity at 70 degrees C from 0 to 70 h) using a variety of analytical techniques aimed at monitoring moisture incorporation. While the total oxygen content did not significantly increase during the test, a limited fraction of oxygen forms paramagnetic centers in P3HT, PCBM and, more limitedly, P3HT:PCBM heterojunctions. A strong correlation exists between the density of paramagnetic centers and the decay in the AM 1.5 photoconversion efficiency of the devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749813]
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