Simple and Low-Cost Vanadyl Oxalate as Hole Transporting Layer Enables Efficient Organic Solar Cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Mengdi Li
  • Yuefeng Zhang
  • Dongdong Xia
  • Jie Fang
  • Qian Xie
  • Yanxun Li
  • Chaowei Zhao
  • Chengyi Xiao
  • Shengyong You
  • Jicai Zhang
  • Lang Jiang
  • Weiwei Li

Detail(s)

Original languageEnglish
Article number2309244
Journal / PublicationAdvanced Functional Materials
Volume34
Issue number1
Online published22 Sept 2023
Publication statusPublished - 2 Jan 2024

Abstract

Organic solar cells (OSCs) with the conventional configuration usually use polyethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) as the hole-transporting layer (HTL); however, its acidity tends to affect the performance and long-term stability of the devices. Therefore, replacing PEDOT:PSS with other more stable HTLs is essential for realizing the practical applications of OSCs. To achieve this goal, a simple and low-cost vanadyl oxalate (VOC2O4) is identified as a HTL to facilitate high power conversion efficiencies (PCEs), good stability, and high thickness tolerance to be achieved in OSCs. The VOC2O4 thin film can be easily prepared by spin-coating from its aqueous solution onto ITO/glass substrate and thermally annealed at 100 °C to exhibit high transmittance, conductivity, and work function. It can be applied as a robust HTL with wide processing conditions, especially after being heated at 200 °C and treated with UV-ozone (UVO) to afford a very high PCE of 18.94% in OSCs. This value is among the highest PCEs obtained for binary OSCs. In addition, the derived OSCs exhibit high thickness tolerance and better stability than those based on PEDOT:PSS as HTL. These results reveal that VOC2O4 is an excellent HTL for OSCs, having great potential for large-area device applications. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • hole transporting layer, organic solar cells, power conversion efficiency, stability, vanadyl oxalate

Citation Format(s)

Simple and Low-Cost Vanadyl Oxalate as Hole Transporting Layer Enables Efficient Organic Solar Cells. / Li, Mengdi; Zhang, Yuefeng; Xia, Dongdong et al.
In: Advanced Functional Materials, Vol. 34, No. 1, 2309244, 02.01.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review