期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 6, 页码 3792-3799出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b10240
关键词
polymer solar cells; AgAl alloy; high efficiency; LiF interlayer; stability; electrodes; ZnO; MoO3
资金
- National Natural Science Foundation of China [61275038, 61275037, 11274119]
- Research Grants Council of Hong Kong [GRF12303114]
- Hong Kong Baptist University [FRG2/14-15/081]
- Shenzhen Peacock Project [KQTD20140630110339343]
The performance and air stability of inverted polymer solar cells (PSCs) were greatly improved using a combination of LiF-modified ITO cathode and a MoO3/AgAl alloy anode. The power conversion efficiency (PCE) of PSCs with AgAl contact reached 9.4%, which is higher than that of the cells with Ag (8.8%) and Al electrode (7.6%). The PCE of AgAl-based PSCs can further increase up to 10.3% through incorporating an ultrathin LiF-modified ITO. AgAl-based cells also exhibit a superior stability compared to the cells with Ag and Al contacts. PCE of the AgAl-based cells without encapsulation remains 78% of its original value after the cells were aged for 380 days in air. The presence of a LiF-modified ZnO interlayer between ITO and the organic active layer improves the charge collection. The improvement in PCE and stability of the AgAl-based cells is primarily attributed to the formation of AlOx at the MoO3/AgAI interface, preventing Ag diffusion and improving the built-in potential across the active layer in the cells.
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