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Solution-processed Molybdenum Oxide Hole Transport Layer Stabilizes Organic Solar Cells

  • Yan Fu Liu
  • , Si Wen Zhang
  • , Yan Xun Li
  • , Shi Lin Li
  • , Li Qing Huang
  • , Ya Nan Jing
  • , Qian Cheng
  • , Lin Ge Xiao
  • , Bo Xin Wang
  • , Bing Han*
  • , Jia Jie Kang
  • , Yuan Zhang
  • , Hong Zhang*
  • , Hui Qiong Zhou*
  • *Corresponding author for this work
  • National Center for Nanoscience and Technology
  • Zhengzhou University
  • China University of Geosciences, Beijing
  • Beihang University
  • PLA Rocket Force Characteristic Medical Center

Research output: Contribution to journalArticlepeer-review

Abstract

The hole transport layer (HTL) affects the device performance and stability of organic solar cells. In this work, a stable molybdenum oxide (MoOx) hole transport layer with low cost was prepared by adjusting the state of the precursor solution with an alcoholic solution of molybdenum acetylacetonate through an oxidant. The MoOx transport layer has good transmittance with a work function of 5.07 eV and higher surface energy. The PM6:Y6 devices using MoOx HTL achieve a high efficiency of 16.8%. MoOx HTL exhibits good applicability with excellent performance in both ternary and all-polymer systems. Air storage stability T80 of the all-polymer device using MoOx HTL was over 600 h, much higher than 70 h of the PEDOT:PSS-based device, and its thermal stability at 85 °C and operational stability under light show better stability than that of the PEDOT:PSS hole transport layer. This work provides a facile and low-cost method to fabricate HTL for organic solar cells, which is beneficial to improve their efficiency and stability.

Original languageEnglish
Pages (from-to)202-211
Number of pages10
JournalChinese Journal of Polymer Science (English Edition)
Volume41
Issue number2
DOIs
StatePublished - Feb 2023

Keywords

  • Hole transport layer
  • Molybdenum oxide
  • Stability

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