期刊
ADVANCED ENERGY MATERIALS
卷 3, 期 12, 页码 1614-1622出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201300272
关键词
polymer solar cells; nickel oxides; buffer layers; solution processing
类别
资金
- National High Technology Research and Development Program of China (863 Program) [2011AA050520]
- National Natural Science Foundation of China [61176054]
- Natural Science Foundation of Jiangsu Province of China [SBK201122663]
By application of thermal annealing and UV ozone simultaneously, a solution-processed NiOx film can achieve a work function of approximately -5.1 eV at a temperature below 150 degrees C, which allows the processing of NiOx that is compatible with fabrication of polymer solar cells (PSCs) on plastic substrates. The low processing temperature, which is greatly reduced from 250-400 degrees C to 150 degrees C, is attributed to the high concentration of NiOOH species on the film surface. This concentration will result in a large surface dipole and lead to increased work function. The pretreated NiOx is demonstrated to be an efficient buffer layer in PSCs based on polymers with different highest occupied molecular orbital energy levels. Compared with conventional poly(3,4-ethylenedioxy-thiophene):poly(styrenesulfonate)-buffered PSCs, the NiOx-buffered PSCs achieve similar or improved device performance as well as enhanced device stability.
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