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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 35, Number 2
BKCSDE 35(2)
February 20, 2014 

Enhanced Stability of Organic Photovoltaics by Additional ZnO Layers on Rippled ZnO Electron-collecting Layer using Atomic Layer Deposition
Kwang-Dae Kim, Dong Chan Lim*, Myung-Geun Jeong, Hyun Ook Seo, Bo Yeol Seo, Joo Yul Lee, Youngsup Song, Shinuk Cho, Jae-Hong Lim, Young Dok Kim*
Organic photovoltaic, ZnO, Surface defect, Stability, Atomic layer deposition
We fabricated organic photovoltaic (OPV) based on ZnO ripple structure on indium tin oxide as electroncollecting layers and PTB7-F20 as donor polymer. In addition, atomic layer deposition (ALD) was used for preparing additional ZnO layers on rippled ZnO. Addition of 2 nm-thick ALD-ZnO resulted in enhanced initial OPV performance and stability. Based on photoluminescence results, we suggest that ALD-ZnO layers reduced number of surface defect sites on ZnO, which can act as electron-hole recombination center of OPV, and increased resistance of ZnO towards surface defect formation.
353 - 356
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