A Spirobixanthene-Based Dendrimeric Hole-Transporting Material for Perovskite Solar Cells

Wei Yu, Jinhui Zhang, Dandan Tu, Qing Yang, Xuchao Wang, Xuan Liu, Feng Cheng, Yu Qiao, Gang Li, Xin Guo, Can Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

A dendrimer based on a spirobixanthene core, termed DH1, is designed and synthesized as a hole-transporting material (HTM) for perovskite solar cells (PSCs). DH1 showing a hyperbranched structure with methoxydiphenylamine carbazole dendrons stretching outward along the para-phenylene spacer acquires a large molecular size of up to 1.9 nm, which favors good thermal stability and amorphous property. The thus obtained DH1-based pinhole-free film as a hole-transport layer results in a power conversion efficiency of 17.13% and reduced hysteresis behavior of MAPbI3-based planar PSCs. This work provides the first example of the use of dendrimer-type HTM for PSC application, demonstrating a promising approach to design HTMs in a quasiglobular dendrimer with a large molecular size.

Original languageEnglish
Article number1900367
JournalSolar RRL
Volume4
Issue number1
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • dendrimers
  • hole-transporting materials
  • perovskite solar cells
  • spirobixanthene

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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