Modulating the deep-level defects and charge extraction for efficient perovskite solar cells with high fill factor over 86%

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

30 Scopus Citations
View graph of relations

Author(s)

  • Xingcheng Li
  • Bo Li
  • Zeyan Cen
  • Yanbo Shang
  • Weitao Lian
  • Rui Cao
  • Lingbo Jia
  • Xiaofen Jiang
  • Tao Chen
  • Yalin Lu
  • Shangfeng Yang

Detail(s)

Original languageEnglish
Pages (from-to)4813-4822
Journal / PublicationEnergy & Environmental Science
Volume15
Issue number11
Online published27 Sept 2022
Publication statusPublished - 1 Nov 2022

Abstract

Perovskite solar cells (PSCs) have drawn unprecedented attention due to their skyrocketing power conversion; however, their reported fill factors (FFs) still lag behind those of commercialized solar cells, and there is a lack of a comprehensive understanding of the mechanism. Here, we employed a facile and effective strategy to improve the FF to 96.3% of the Shockley-Queisser (S-Q) limit through homogeneous incorporation of CsPbBr3 crystals, which could significantly passivate deep-level hole defects, thereby leading to dramatically enhanced hole mobility to balance with electron mobility. As a result, the non-radiative recombination is suppressed along with enhanced carrier extraction efficiency, resulting in a remarkable PCE of 25.09% (certified: 24.66%) with a record FF of 86.9%, which is the highest FF among those of the reported PSCs. An in-depth analysis suggests that this strategy could concurrently reduce the FF loss caused by series resistance, shunt resistance, and non-radiative recombination. This work provides an efficient strategy to promote the FF to approach the theoretical limit.

Research Area(s)

  • LAYERS

Citation Format(s)

Modulating the deep-level defects and charge extraction for efficient perovskite solar cells with high fill factor over 86%. / Li, Xingcheng; Wu, Xin; Li, Bo et al.
In: Energy & Environmental Science, Vol. 15, No. 11, 01.11.2022, p. 4813-4822.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review