title: Preparation of Reduced Graphene Oxide:ZnO Hybrid Cathode Interlayer Using In Situ Thermal Reduction/Annealing for Interconnecting Nanostructure and Its Effect on Organic Solar Cell.
abstract: A novel hybrid cathode interlayer (CIL) consisting of reduced graphene oxide and zinc oxide (ZnO) is realized in the inverted organic solar cells (OSCs). A dual-nozzle spray coating system and facile one-step in situ thermal reduction/annealing (ITR/ITA) method are introduced to precisely control the components of the CIL, assemble ZnO with graphene oxide, and reduce graphene oxide into in situ thermal reduced graphene oxide (IT-RGO), simultaneously. The ZnO:IT-RGO hybrid CIL shows high electric conductivity, interconnecting nanostructure, and matched energy level, which leads to a significant enhancement in the power conversion efficiency from 6.16% to 8.04% for PTB7:PC71BM and from 8.02% to 9.49% for PTB7-Th:PC71BM-based OSCs, respectively. This newly developed spray-coated ZnO:IT-RGO hybrid CIL based on one-step ITR/ITA treatment has the high potential to provide a facile pathway to fabricate the large-scale, fast fabrication, and high performance OSCs.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People's Republic of China.
authors.forename: Ding
authors.initials: D
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People's Republic of China.
authors.forename: Pu
authors.initials: P
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People's Republic of China.
authors.forename: Yifan
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People's Republic of China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People's Republic of China.
authors.forename: Junsheng
authors.identifier: http://orcid.org/0000-0002-7484-8114
authors.initials: J
authors.lastname: Yu
keywords: hybrid cathode interlayer; in situ thermal annealing; in situ thermal reduction; organic solar cell; reduced graphene oxide; spray coating; zinc oxide