Hole extraction layer utilizing well defined graphene oxide with multiple functionalities for high-performance bulk heterojunction solar cells Original Research Article Organic Electronics, Volume 15, Issue 11, November 2014, Pages 2868-2875 Chao Li, Xiaoming Yang, Yue Zhao, Pan Zhang, Yingfeng Tu, Yaowen Li
Graphical abstractA simple method for synthesizing a series of graphene oxide with precise oxidation (pr-GO) (mild oxidation, moderate oxidation and severe oxidation) has been successfully developed. pr-GOs present multiple functionalities which is an excellent hole extraction material. Moderate oxidated pr-GO-3 as hole extraction layer (HEL) exhibited an improved 3.74% in power conversion efficiency and better air-stability compared to devices with other pr-GOs and conventional PEDOT:PSS HEL.
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