Highly efficient perovskite solar cells with precursor composition-dependent morphology

Chun Huang, Nianqing Fu, Fangyang Liu, Liangxing Jiang, Xiaojing Hao, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

Film uniformity and large crystalline size are indispensable and critical for obtaining high performance planar perovskite solar cells. Perovskite precursor composition plays a key role in the formation of high quality perovskite films. In this work, excess PbCl2is deliberately introduced, and is found to facilitate the solubility of CH3NH3I in concentrated solution at room temperature. The excess PbCl2is found to alter the formation pathway of perovskite thin films. Accordingly, the formation pathway is proposed. Analysis of the perovskite films and associated devices revealed that extremely uniform perovskite films consisting of large grains of several microns can be obtained with a small amount of excess PbCl2. The associated planar perovskite solar cells showed a reliable and reproducible efficiency of 16.1%.
Original languageEnglish
Pages (from-to)231-237
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume145
DOIs
Publication statusPublished - 1 Feb 2016

Keywords

  • PbCl 2
  • Perovskite Solar cell
  • Precursor composition
  • Thin film formation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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