Control of the Nucleation and Growth of the Lead Acetate Solution Derived CH3NH3PbI3 Films Leads to Enhanced Power Conversion Efficiency

Yuanqing Chen, Aditya S. Yerramilli, Lingwei Li, Wenwen Qu, Yuxia Shen, Yang Song, Terry Alford

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Control of the nucleation and growth of the CH3NH3PbI3 (MAPbI3) phase is one of the important issues in the development of the high-performance MAPbI3 perovskite solar cells. In this work, we demonstrated a novel and easy nucleation-controlling process to fabricate high-performance MAPbI3 solar cells using lead acetate as a precursor. The morphology and crystallinity of the final annealed perovskite film is greatly influenced by the intermediate phase in the precursor film. Efficient removal of the solvent and reactants by the use of long-time spin coating process makes the MAPbI3 nucleate at room temperature and grain coarsening during the anneal, resulting in the annealed films with smooth surface and high compactness. Precise control of the spin coating time made the average power conversion efficiency of the MAPbI3 solar cells increase from 12-13% to 15-16%.

Original languageEnglish (US)
Pages (from-to)2898-2906
Number of pages9
JournalACS Applied Energy Materials
Volume1
Issue number6
DOIs
StatePublished - Jun 25 2018

Keywords

  • nucleation
  • perovskite
  • power conversion efficiency
  • solar cells
  • spin coating

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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