Excess PbI2 Management via Multimode Supramolecular Complex Engineering Enables High-Performance Perovskite Solar Cells

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

3 Scopus Citations
View graph of relations

Author(s)

  • Hengkai Zhang
  • Wei Yu
  • Junxue Guo
  • Chao Xu
  • Zhiwei Ren
  • Kuan Liu
  • Guang Yang
  • Minchao Qin
  • Jiaming Huang
  • Zhiliang Chen
  • Qiong Liang
  • Zehan Wu
  • Yaokang Zhang
  • Hrisheekesh Thachoth Chandran
  • Jianhua Hao
  • Ye Zhu
  • Xinhui Lu
  • Zijian Zheng
  • Jinsong Huang
  • Gang Li

Detail(s)

Original languageEnglish
Article number2201663
Journal / PublicationAdvanced Energy Materials
Volume12
Issue number35
Online published28 Jul 2022
Publication statusPublished - 15 Sep 2022

Abstract

Excess PbI2 in perovskite film is an effective strategy for boosting perovskite solar cells (PSCs) performance. However, the presence of unreacted PbI2 is a critical source of intrinsic instability in perovskite under illumination, due to the photolysis of PbI2 (decomposed into metallic lead and iodine). Herein, this issue is solved by applying ionic liquids (ILs) on PSCs where the ILs can form types of stable supramolecules with residual lead iodide. The formation process and mechanism of the supramolecules are elucidated. The residual PbI2 is also revealed to cause high level lead interstitial defects and induced tensile strain which further deteriorate device performance. The self-assembled supramolecular complex can passivate the PSCs where significant enhancements are achieved in both power conversion efficiency (PCE, from 21.9% to 23.4%) and device stability (retaining 95% of the initial PCE after 4080 h in ambient dry-air storage, and 80% after 1400 h continuous light illumination).

Research Area(s)

  • excess PbI2 management, ionic liquids, perovskite solar cells, IONIC LIQUID, HALIDE PEROVSKITES, STABILITY, ORGANIZATION, PASSIVATION, EFFICIENCY, SALTS

Citation Format(s)

Excess PbI2 Management via Multimode Supramolecular Complex Engineering Enables High-Performance Perovskite Solar Cells. / Zhang, Hengkai; Yu, Wei; Guo, Junxue; Xu, Chao; Ren, Zhiwei; Liu, Kuan; Yang, Guang; Qin, Minchao; Huang, Jiaming; Chen, Zhiliang; Liang, Qiong; Shen, Dong; Wu, Zehan; Zhang, Yaokang; Chandran, Hrisheekesh Thachoth; Hao, Jianhua; Zhu, Ye; Lee, Chun-sing; Lu, Xinhui; Zheng, Zijian; Huang, Jinsong; Li, Gang.

In: Advanced Energy Materials, Vol. 12, No. 35, 2201663, 15.09.2022.

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