期刊
ORGANIC ELECTRONICS
卷 14, 期 1, 页码 100-104出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2012.10.013
关键词
Organic solar cells; Polymer solar cells; Inverted solar cells; Zinc oxide; Solution process
资金
- Basic Science Research program [2012-0006813]
- Converging Research Center program [2012K001277]
- Global Frontier R&D Program on Center for Multi-scale Energy System [2012-054864]
- National Research Foundation (NRF) under the Ministry of Education, Science and Technology of Korea
- NRF [2011-0015172]
- Korean Ministry of Education, Science and Technology
We investigate the effects of ZnO annealing temperature (T-A) on the performance of inverted polymer solar cells with ZnO electron-selective layers deposited by spin coating aqueous solutions of an ammine-hydroxo zinc complex. The inverted solar cells based on poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid methyl ester with T-A as low as 80 degrees C exhibit power-conversion efficiencies of 3.6%, which is equal to those of devices with higher T-A. Characterizations of the ZnO films using X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, grazing incidence wide-angle X-ray scattering, and optical transmittance measurements show that the abrupt improvement of device performance from T-A = 60 to 80 degrees C is due to the improvement of energy-level alignment arising from the increases in the relative amount and the crystallinity of ZnO. (C) 2012 Elsevier B.V. All rights reserved.
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