Introduction of nitrogen gas flow and precursor aging process to improve the efficiency of the lead acetate derived CH3NH3PbI3 perovskite solar cells

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

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

In this study of the fabricated perovskite solar cells, flowing nitrogen is introduced during the spin coating of the precursor to remove the solvent vapor. The precursor is then aged prior to the anneal to obtain a pinhole-free perovskite film. Both the nitrogen flow and precursor aging methods resulted in improved film quality. The phase composition and orientation of the CH3NH3PbI3 phase was tuned through control of the aging time. This lead to high-performance CH3NH3PbI3 planar perovskite solar cells with power conversion efficiency over 16%. The intermediate phase composition was sensitive to the ambient atmosphere. The content of the PbI2 in the final CH3NH3PbI3 films varied with precursor aging time. The combination of nitrogen flow and suitable aging time resulted in films with enhanced (110)-orientation, compactness, charge carrier lifetimes, and correspondingly power conversion efficiencies.

Original languageEnglish (US)
Pages (from-to)49-56
Number of pages8
JournalSolar Energy Materials and Solar Cells
Volume190
DOIs
StatePublished - Feb 1 2019

Keywords

  • Intermediate phase
  • Lead halide
  • Perovskite
  • Solar cells

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Introduction of nitrogen gas flow and precursor aging process to improve the efficiency of the lead acetate derived CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite solar cells'. Together they form a unique fingerprint.

  • Cite this