Stabilizer-assisted growth of formamdinium-based perovskites for highly efficient and stable planar solar cells with over 22% efficiency

Guang Yang, Hengkai Zhang, Gang Li, Guojia Fang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

The best reported state-of-the-art perovskite solar cells (PSCs) show record power conversion efficiency (PCE) over 23%, where sequentially deposited formamidinium (FA)-dominated perovskites were adopted. Here, we develop a stabilizer-assisted growth method involving two stabilizers (MAPbBr3 and MACl) to fabricate phase-pure formamidinium lead iodide (α-FAPbI3) perovskite and substantially improve its opto-electronic properties. The high crystalline and large crystal grains within the α-FAPbI3 perovskite film as well as the reduced defects contribute to the enhanced PCE up to 22.51% in planar PSCs. More importantly, the stability of phase-stabilized FAPbI3 PSC is also significantly improved and the corresponding device exhibits an impressive 97% retention after 2600 h storage under ambient conditions. This work paves a way to further improve the photovoltaic performance and stability of FA-based planar PSCs.

Original languageEnglish
Article number103835
JournalNano Energy
Volume63
DOIs
Publication statusPublished - Sep 2019

Keywords

  • Opto-electronic properties
  • Phase-stabilized FAPbI3
  • Reduced defects
  • Stabilizer

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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