An aqueous solution-processed CuOX film as an anode buffer layer for efficient and stable organic solar cells. Issue 14 (17th March 2016)

• Record Type: Journal Article
• Authors: Yu, Zhikai; Liu, Wenqing; Fu, Weifei; Zhang, Zhongqiang; Yang, Weitao; Wang, Shengping; Li, Hongfei; Xu, Mingsheng; Chen, Hongzheng
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 14(2016)
• Page Start: 5130
• Page End: 5136
• Publication Date: 2016-03-17
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta00909c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A facile and green method has been developed for the aqueous solution preparation of CuO X as an anode buffer layer for organic solar cells (OSCs). Abstract : A facile and green method has been developed for the aqueous solution preparation of CuO X as an anode buffer layer for organic solar cells (OSCs). The CuO X buffer layer is prepared simply by spin-coating a copper acetylacetonate precursor based aqueous solution onto an ITO substrate at room temperature in ambient air. Hydrogen peroxide (H2 O2 ) is used to modify the precursor aqueous solution and can greatly increase the work function of the CuO X film to improve the hole collection efficiency and the charge transport efficiency. UV-ozone post-treatment of the CuO X film leads to the fully oxidized state of copper oxide, which significantly improves the performance of OSCs. Through H2 O2 modification and UV-ozone post-treatment on the CuO X anode buffer layer, the highest power conversion efficiency of the OSCs based on PTB7:PC71 BM blends reaches 8.68%, which is 10% higher than that of the standard PEDOT:PSS anode buffer layer based OSCs. In addition, the devices with the CuO X buffer layer show much better air stability than those with PEDOT:PSS. Our results indicate that the aqueous solution processed CuO X with low cost and green solvents is a promising anode buffer layer material for efficient and stable OSCs.