TY - JOUR
T1 - High-Performance Ternary Perovskite–Organic Solar Cells
AU - Zhu, Tao
AU - Shen, Lening
AU - Xun, Sangni
AU - Sarmiento, Julio S.
AU - Yang, Yongrui
AU - Zheng, Luyao
AU - Li, Hong
AU - Wang, He
AU - Bredas, Jean Luc
AU - Gong, Xiong
N1 - Funding Information:
T.Z., L.S., and S.X. contributed equally to this work. The authors at The University of Akron acknowledge the National Science Foundation (ECCS/EPMD1903303) and Air Force Office of Scientific Research (AFOSR) (through the Organic Materials Chemistry Program, Grant Number: FA9550‐15‐1‐0292, Program Manager, Dr. Kenneth Caster) for financial support. H.L. and J.L.B. acknowledge support from the College of Science of the University of Arizona and the Department of the Navy, Office of Naval Research (Award No. N00014‐20‐1‐2110); they also thank the DOD High‐Performance Computing Modernization Program for computational resources. H.W. acknowledges funding from AFOSR Award FA9550‐17‐1‐0099.
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - Perovskite solar cells in which 2D perovskites are incorporated within a 3D perovskite network exhibit improved stability with respect to purely 3D systems, but lower record power conversion efficiencies (PCEs). Here, a breakthrough is reported in achieving enhanced PCEs, increased stability, and suppressed photocurrent hysteresis by incorporating n-type, low-optical-gap conjugated organic molecules into 2D:3D mixed perovskite composites. The resulting ternary perovskite–organic composites display extended absorption in the near-infrared region, improved film morphology, enlarged crystallinity, balanced charge transport, efficient photoinduced charge transfer, and suppressed counter-ion movement. As a result, the ternary perovskite–organic solar cells exhibit PCEs over 23%, which are among the best PCEs for perovskite solar cells with p–i–n device structure. Moreover, the ternary perovskite–organic solar cells possess dramatically enhanced stability and diminished photocurrent hysteresis. All these results demonstrate that the strategy of exploiting ternary perovskite–organic composite thin films provides a facile way to realize high-performance perovskite solar cells.
AB - Perovskite solar cells in which 2D perovskites are incorporated within a 3D perovskite network exhibit improved stability with respect to purely 3D systems, but lower record power conversion efficiencies (PCEs). Here, a breakthrough is reported in achieving enhanced PCEs, increased stability, and suppressed photocurrent hysteresis by incorporating n-type, low-optical-gap conjugated organic molecules into 2D:3D mixed perovskite composites. The resulting ternary perovskite–organic composites display extended absorption in the near-infrared region, improved film morphology, enlarged crystallinity, balanced charge transport, efficient photoinduced charge transfer, and suppressed counter-ion movement. As a result, the ternary perovskite–organic solar cells exhibit PCEs over 23%, which are among the best PCEs for perovskite solar cells with p–i–n device structure. Moreover, the ternary perovskite–organic solar cells possess dramatically enhanced stability and diminished photocurrent hysteresis. All these results demonstrate that the strategy of exploiting ternary perovskite–organic composite thin films provides a facile way to realize high-performance perovskite solar cells.
KW - low-optical-gap conjugated organic molecules
KW - perovskite solar cells
KW - photocurrent hysteresis
KW - power conversion efficiency
KW - ternary perovskite–organic composites
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U2 - 10.1002/adma.202109348
DO - 10.1002/adma.202109348
M3 - Article
C2 - 35038370
AN - SCOPUS:85124762192
VL - 34
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 13
M1 - 2109348
ER -