TY - JOUR
T1 - Dopant-Free Tetrakis-Triphenylamine Hole Transporting Material for Efficient Tin-Based Perovskite Solar Cells
AU - Ke, Weijun
AU - Priyanka, Pragya
AU - Vegiraju, Sureshraju
AU - Stoumpos, Constantinos C.
AU - Spanopoulos, Ioannis
AU - Soe, Chan Myae Myae
AU - Marks, Tobin J.
AU - Chen, Ming Chou
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
This work was supported in part by the ANSER Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences, under Award DE-SC0001059. This work made use of the EPIC facility (NUANCE Center−Northwestern University), which has received support from the MRSEC program (NSF DMR-1121262) at the Materials Research Center, and the Nanoscale Science and Engineering Center (EEC-0118025/003), both programs of the National Science Foundation; the State of Illinois; and Northwestern University. The support at National Central University was received from the Ministry of Science and Technology of Taiwan (MOST).
Funding Information:
This work made use of the EPIC facility (NUANCE Center Northwestern University), which has received support from the MRSEC program (NSF DMR-1121262) at the Materials Research Center, and the Nanoscale Science and Engineering Center (EEC-0118025/003), both programs of the NationalScience Foundation; the State of Illinois; and Northwestern University.The support at National Central University was received from the Ministry of Science and Technology of Taiwan (MOST).
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2018/1/10
Y1 - 2018/1/10
N2 - 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.
AB - 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.
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U2 - 10.1021/jacs.7b10898
DO - 10.1021/jacs.7b10898
M3 - Article
C2 - 29211458
AN - SCOPUS:85040324648
SN - 0002-7863
VL - 140
SP - 388
EP - 393
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 1
ER -