A linear conjugated tetramer as a surface-modification layer to increase perovskite solar cell performance and stability

Helin Wang, Jun Song, Zikang Li, Ludong Li, Jiahua Li, Xiaobin Li, Junle Qu, Wai Yeung Wong (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

A surface-modification layer is important for the performance and stability of perovskite solar cells, but the research on surface-modification materials is still lagging behind perovskite materials in the photovoltaic field. In this work, a linear conjugated tetramer, IDTT4PDI, was developed through Stille coupling with a high synthetic yield. IDTT4PDI showed excellent solubility, thermal stability, a suitable LUMO level (-4.08 eV), and high electron mobility, implying that it would be suitable for use as a surface-modification layer in inverted perovskite solar cells. The use of IDTT4PDI as a surface-modification layer improved the interfacial contact between the perovskite layer and PCBM film, reduced the trap-assisted recombination, and enhanced the electron transport efficiency. As a result, an efficiency of over 20% is achieved by an IDTT4PDI-modified MAPbI3 perovskite inverted device, which is much higher than that of the control device (17%). This work opens up a new direction for the use of linear perylene diimide derivatives as efficient surface-modification materials for achieving high-efficiency perovskite solar cells. This journal is

Original languageEnglish
Pages (from-to)11728-11733
Number of pages6
JournalJournal of Materials Chemistry A
Volume8
Issue number23
DOIs
Publication statusPublished - 21 Jun 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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