Dopant‐Free Hole‐Transporting Material with Enhanced Intermolecular Interaction for Efficient and Stable n‐i‐p Perovskite Solar Cells

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

1 Scopus Citations
View graph of relations

Author(s)

  • Tian Qin
  • Kaicheng Zhang
  • Ning Li
  • Juan Zhao
  • Zhenguo Chi
  • Zonglong Zhu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2100967
Journal / PublicationAdvanced Energy Materials
Volume11
Issue number29
Online published17 Jun 2021
Publication statusPublished - 5 Aug 2021

Abstract

Developing low-cost, efficient, and stable dopant-free hole-transporting materials (HTMs) in perovskite solar cells (PVSCs) is essential to their commercial deployment. Herein, the synthesis of a novel spirofluorene-dithiolane based small molecular HTM, SFDT-TDM, through facile and low-cost synthetic routes is reported. The C-Hπ interactions in adjacent SFDT-TDM are beneficial for high hole mobility and the methylthio groups in SFDT-TDM can serve as Lewis bases to passivate the defects on the surface of perovskite films, leading to suppressed non-radiative recombination and enhanced charge extraction at the perovskite/HTM interface. As a result, CsxFA1−xPbI3 based PVSCs with SFDT-TDM as the HTM realize champion power conversion efficiencies (PCEs) of 21.7% and 20.3% for small-area (0.04 cm2) and large-area (1.0 cm2) devices with negligible photocurrent hysteresis, respectively. Additionally, all-inorganic CsPbI3−xBrx based PVSCs with SFDT-TDM demonstrate an impressive PCE of 17.1% along with excellent stability. This work highlights the great potential of the spirofluorene core for exploring low-cost and dopant-free HTMs for PVSCs with high efficiency and stability.

Research Area(s)

  • defect passivation, dopant-free HTM, inorganic perovskites, MA-free perovskites, perovskite solar cells

Citation Format(s)

Dopant‐Free Hole‐Transporting Material with Enhanced Intermolecular Interaction for Efficient and Stable n‐i‐p Perovskite Solar Cells. / Wang, Jing; Wu, Xin; Liu, Yizhe; Qin, Tian; Zhang, Kaicheng; Li, Ning; Zhao, Juan; Ye, Ruquan; Fan, Zhanxi; Chi, Zhenguo; Zhu, Zonglong.

In: Advanced Energy Materials, Vol. 11, No. 29, 2100967, 05.08.2021.

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