Benzodithiophene Hole-Transporting Materials for Efficient Tin-Based Perovskite Solar Cells

Sureshraju Vegiraju, Weijun Ke, Pragya Priyanka, Jen Shyang Ni, Yi Ching Wu, Ioannis Spanopoulos, Shueh Lin Yau, Tobin J. Marks, Ming Chou Chen, Mercouri G. Kanatzidis

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Developing efficient interfacial hole transporting materials (HTMs) is crucial for achieving high-performance Pb-free Sn-based halide perovskite solar cells (PSCs). Here, a new series of benzodithiophene (BDT)-based organic small molecules containing tetra- and di-triphenyl amine donors prepared via a straightforward and scalable synthetic route is reported. The thermal, optical, and electrochemical properties of two BDT-based molecules are shown to be structurally and energetically suitable to serve as HTMs for Sn-based PSCs. It is reported here that ethylenediammonium/formamidinium tin iodide solar cells using BDT-based HTMs deliver a champion power conversion efficiency up to 7.59%, outperforming analogous reference solar cells using traditional and expensive HTMs. Thus, these BDT-based molecules are promising candidates as HTMs for the fabrication of high-performance Sn-based PSCs.

Original languageEnglish
Article number1905393
JournalAdvanced Functional Materials
Volume29
Issue number45
DOIs
Publication statusPublished - Nov 1 2019

Keywords

  • benzodithiophene
  • lead-free
  • perovskite solar cells
  • tin
  • triphenylamine

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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