D-A-π-A-D-type Dopant-free Hole Transport Material for Low-Cost, Efficient, and Stable Perovskite Solar Cells

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

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Author(s)

  • Tianqi Niu
  • Weiya Zhu
  • Yiheng Zhang
  • Qifan Xue
  • Xuechen Jiao
  • Zijie Wang
  • Ping Li
  • Runfeng Chen
  • Fei Huang
  • Yuan Li
  • Yong Cao

Detail(s)

Original languageEnglish
Pages (from-to)249-269
Journal / PublicationJoule
Volume5
Issue number1
Online published23 Dec 2020
Publication statusPublished - 20 Jan 2021

Abstract

The development of low-cost and efficient hole transport materials (HTMs) is important for the commercialization of perovskite solar cells (PSCs). Comparing with the widely studied D-A-D and D-π-D linear-type small molecule HTMs, DTB-FL with a D-A-π-A-D molecular design is proposed, featuring facile synthesis and excellent opto-electronic properties. Moreover, the HTM with efficient surface passivation effects and proper energy level alignment at the hole extraction interface effectively inhibits recombination loss and improves the charge collection property.  As a result, the champion efficiencies of 21.5% and 19.6% for active areas of 0.09 and 1.0 cm2, respectively, with superior operational stability are achieved by using DTB-FL HTM. In addition, DTB-FL can also be used as efficient HTM for all-inorganic PSCs, producing an impressive PCE of 17.0%with a high Voc of 1.30 V. These results underscore the promising potential of the D-A-π-A-D molecular design in preparing low-cost dopant-free HTMs toward stable and efficient PSCs.

Research Area(s)

  • D-A-π-A-D type, dopant-free, hole transport material, MA-free, perovskite solar cells

Citation Format(s)

D-A-π-A-D-type Dopant-free Hole Transport Material for Low-Cost, Efficient, and Stable Perovskite Solar Cells. / Niu, Tianqi; Zhu, Weiya; Zhang, Yiheng; Xue, Qifan; Jiao, Xuechen; Wang, Zijie; Xie, Yue-Min; Li, Ping; Chen, Runfeng; Huang, Fei; Li, Yuan; Yip, Hin-Lap; Cao, Yong.

In: Joule, Vol. 5, No. 1, 20.01.2021, p. 249-269.

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