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

Ding Zheng, Wei Huang, Pu Fan, Yifan Zheng, Jiang Huang, Junsheng Yu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)4898-4907
Number of pages10
JournalACS Applied Materials and Interfaces
Volume9
Issue number5
DOIs
StatePublished - Feb 8 2017

Keywords

  • hybrid cathode interlayer
  • in situ thermal annealing
  • in situ thermal reduction
  • organic solar cell
  • reduced graphene oxide
  • spray coating
  • zinc oxide

ASJC Scopus subject areas

  • Materials Science(all)

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