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Title: Benzodithiophene Hole‐Transporting Materials for Efficient Tin‐Based Perovskite Solar Cells

Journal Article · · Advanced Functional Materials
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  1. Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Modules National Central University Taoyuan 32001 Taiwan
  2. Department of Chemistry and the Center for Light Energy Activated Redox Processes (LEAP) Northwestern University Evanston IL 60208 USA

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.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC0001059
OSTI ID:
1560270
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 29 Journal Issue: 45; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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