Giant improvement of performances of perovskite solar cells via component engineering

Qingbo Wei, Dongpu Chang, Zhangwen Ye, Xue Li, Lingxing Zan, Loujun Gao, Feng Fu, Dong Yang

Research output: Contribution to journalArticlepeer-review

Abstract

The absorption layer is a crucial factor for high-performance perovskite solar cells. In this work, the influence of the two components, methylammonium iodide (MAI) and formamidinium iodide (FAI) on the morphology, optical absorption and photovoltaic performances was systematically investigated. The results revealed that the surface morphologies of MAI/FAI based perovskite films were rougher, and the grain sizes became larger with increasing the FAI concentration. UV–Vis and photoluminescence spectra showed that there was a red shift with enhancing the FAI concentration. By the effective doping of FAI into the pristine MAI based perovskite film, the formation of a δ-FAPbI3 was successfully inhibited. As a result, the power conversion efficiency (PCE) of the perovskite solar cells based on mixed absorption layers was improved by about 27% compared to the pristine MAI based perovskite device.

Original languageEnglish (US)
Pages (from-to)393-400
Number of pages8
JournalJournal of Colloid And Interface Science
Volume588
DOIs
StatePublished - Apr 15 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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