Dopant-Free Tetrakis-Triphenylamine Hole Transporting Material for Efficient Tin-Based Perovskite Solar Cells

Ke, Weijun; Priyanka, Pragya; Vegiraju, Sureshraju; Stoumpos, Constantinos C.; Spanopoulos, Ioannis; Soe, Chan Myae Myae; Marks, Tobin J.; Chen, Ming-Chou; Kanatzidis, Mercouri G.

doi:10.1021/jacs.7b10898

Dopant-Free Tetrakis-Triphenylamine Hole Transporting Material for Efficient Tin-Based Perovskite Solar Cells

Journal Article · Wed Dec 06 00:00:00 EST 2017 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/jacs.7b10898· OSTI ID:1470385

^[1]; Priyanka, Pragya ^[2]; Vegiraju, Sureshraju ^[2]; ^[1]; Spanopoulos, Ioannis ^[1]; Soe, Chan Myae Myae ^[1]; ^[1]; Chen, Ming-Chou ^[2]; ^[1]

Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
National Central Univ., Chung-Li (Taiwan). Dept. of Chemistry

Developing dopant-free hole transporting layers (HTLs) is critical in achieving high-performance and robust state-of-the-art perovskite photovoltaics, especially for the air-sensitive tin-based perovskite systems. The commonly used HTLs require hygroscopic dopants and additives for optimal performance, which adds extra cost to manufacturing and limits long-term device stability. Here we demonstrate the use of a novel tetrakis-triphenylamine (TPE) small molecule prepared by a facile synthetic route as a superior dopant-free HTL for lead-free tin-based perovskite solar cells. The best-performing tin iodide perovskite cells employing the novel mixed-cation ethylenediammonium/formamidinium with the dopant-free TPE HTL achieve a power conversion efficiency as high as 7.23%, ascribed to the HTL’s suitable band alignment and excellent hole extraction/collection properties. This efficiency is one of the highest reported so far for tin halide perovskite systems, highlighting potential application of TPE HTL material in low-cost high-performance tin-based perovskite solar cells.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0001059

OSTI ID:: 1470385

Journal Information:: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 1 Vol. 140; ISSN 0002-7863

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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