Water-Soluble Polymeric Interfacial Material for Planar Perovskite Solar Cells

Lingling Zheng, Yingzhuang Ma, Lixin Xiao, Fengyan Zhang, Yuanhao Wang, Hongxing Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Interfacial materials play a critical role in photoelectric conversion properties as well as the anomalous hysteresis phenomenon of the perovskite solar cells (PSCs). In this article, a water-soluble polythiophene PTEBS was employed as a cathode interfacial material for PSCs. Efficient energy level aligning and improved film morphology were obtained due to an ultrathin coating of PTEBS. Better ohmic contact between the perovskite layer and the cathode also benefits the charge transport and extraction of the device. Moreover, less charge accumulation at the interface weakens the polarization of the perovskite resulting in a relatively quick response of the modified device. The ITO/PTEBS/CH3NH3PbI3/spiro-MeOTAD/Au cells by an all low-temperature process achieved power conversion efficiencies of up to 15.4% without apparent hysteresis effect. Consequently, the utilization of this water-soluble polythiophene is a practical approach for the fabrication of highly efficient, large-area, and low-cost PSCs and compatible with low-temperature solution process, roll-to-roll manufacture, and flexible application.
Original languageEnglish
Pages (from-to)14129-14135
Number of pages7
JournalACS Applied Materials and Interfaces
Volume9
Issue number16
DOIs
Publication statusPublished - 26 Apr 2017

Keywords

  • hysteresis effect
  • impedance analysis
  • interfacial materials
  • planar perovskite solar cells
  • water-soluble

ASJC Scopus subject areas

  • Materials Science(all)

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