Electrical Loss Management by Molecularly Manipulating Dopant-free Poly(3-hexylthiophene) towards 16.93 % CsPbI2Br Solar Cells

Ming Hua Li; Jiang Yang Shao; Yan Jiang; Fa Zheng Qiu; Shuo Wang; Jianqi Zhang; Guangchao Han; Jilin Tang; Fuyi Wang; Zhixiang Wei; Yuanping Yi; Yu Wu Zhong; Jin Song Hu

doi:10.1002/anie.202105176

Electrical Loss Management by Molecularly Manipulating Dopant-free Poly(3-hexylthiophene) towards 16.93 % CsPbI₂Br Solar Cells

Ming Hua Li, Jiang Yang Shao, Yan Jiang^*, Fa Zheng Qiu, Shuo Wang, Jianqi Zhang, Guangchao Han, Jilin Tang, Fuyi Wang, Zhixiang Wei, Yuanping Yi, Yu Wu Zhong^*, Jin Song Hu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

Abstract

Inorganic cesium lead halide perovskites offer a pathway towards thermally stable photovoltaics. However, moisture-induced phase degradation restricts the application of hole transport layers (HTLs) with hygroscopic dopants. Dopant-free HTLs fail to realize efficient photovoltaics due to severe electrical loss. Herein, we developed an electrical loss management strategy by manipulating poly(3-hexylthiophene) with a small molecule, i.e., SMe-TATPyr. The developed P3HT/SMe-TATPyr HTL shows a three-time increase of carrier mobility owing to breaking the long-range ordering of “edge-on” P3HT and inducing the formation of “face-on” clusters, over 50 % decrease of the perovskite surface defect density, and a reduced voltage loss at the perovskite/HTL interface because of favorable energy level alignment. The CsPbI₂Br perovskite solar cell demonstrates a record-high efficiency of 16.93 % for dopant-free HTL, and superior moisture and thermal stability by maintaining 96 % efficiency at low-humidity condition (10–25 % R. H.) for 1500 hours and over 95 % efficiency after annealing at 85 °C for 1000 hours.

Original language	English
Pages (from-to)	16388-16393
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	60
Issue number	30
DOIs	https://doi.org/10.1002/anie.202105176
Publication status	Published - 19 Jul 2021
Externally published	Yes

Keywords

dopant-free
hole transporting layer
inorganic perovskite
solar cells
stability

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10.1002/anie.202105176

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Li, M. H., Shao, J. Y., Jiang, Y., Qiu, F. Z., Wang, S., Zhang, J., Han, G., Tang, J., Wang, F., Wei, Z., Yi, Y., Zhong, Y. W., & Hu, J. S. (2021). Electrical Loss Management by Molecularly Manipulating Dopant-free Poly(3-hexylthiophene) towards 16.93 % CsPbI₂Br Solar Cells. Angewandte Chemie - International Edition, 60(30), 16388-16393. https://doi.org/10.1002/anie.202105176

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abstract = "Inorganic cesium lead halide perovskites offer a pathway towards thermally stable photovoltaics. However, moisture-induced phase degradation restricts the application of hole transport layers (HTLs) with hygroscopic dopants. Dopant-free HTLs fail to realize efficient photovoltaics due to severe electrical loss. Herein, we developed an electrical loss management strategy by manipulating poly(3-hexylthiophene) with a small molecule, i.e., SMe-TATPyr. The developed P3HT/SMe-TATPyr HTL shows a three-time increase of carrier mobility owing to breaking the long-range ordering of “edge-on” P3HT and inducing the formation of “face-on” clusters, over 50 % decrease of the perovskite surface defect density, and a reduced voltage loss at the perovskite/HTL interface because of favorable energy level alignment. The CsPbI2Br perovskite solar cell demonstrates a record-high efficiency of 16.93 % for dopant-free HTL, and superior moisture and thermal stability by maintaining 96 % efficiency at low-humidity condition (10–25 % R. H.) for 1500 hours and over 95 % efficiency after annealing at 85 °C for 1000 hours.",

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author = "Li, {Ming Hua} and Shao, {Jiang Yang} and Yan Jiang and Qiu, {Fa Zheng} and Shuo Wang and Jianqi Zhang and Guangchao Han and Jilin Tang and Fuyi Wang and Zhixiang Wei and Yuanping Yi and Zhong, {Yu Wu} and Hu, {Jin Song}",

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AU - Li, Ming Hua

AU - Shao, Jiang Yang

AU - Jiang, Yan

AU - Qiu, Fa Zheng

AU - Wang, Shuo

AU - Zhang, Jianqi

AU - Han, Guangchao

AU - Tang, Jilin

AU - Wang, Fuyi

AU - Wei, Zhixiang

AU - Yi, Yuanping

AU - Zhong, Yu Wu

AU - Hu, Jin Song

PY - 2021/7/19

Y1 - 2021/7/19

N2 - Inorganic cesium lead halide perovskites offer a pathway towards thermally stable photovoltaics. However, moisture-induced phase degradation restricts the application of hole transport layers (HTLs) with hygroscopic dopants. Dopant-free HTLs fail to realize efficient photovoltaics due to severe electrical loss. Herein, we developed an electrical loss management strategy by manipulating poly(3-hexylthiophene) with a small molecule, i.e., SMe-TATPyr. The developed P3HT/SMe-TATPyr HTL shows a three-time increase of carrier mobility owing to breaking the long-range ordering of “edge-on” P3HT and inducing the formation of “face-on” clusters, over 50 % decrease of the perovskite surface defect density, and a reduced voltage loss at the perovskite/HTL interface because of favorable energy level alignment. The CsPbI2Br perovskite solar cell demonstrates a record-high efficiency of 16.93 % for dopant-free HTL, and superior moisture and thermal stability by maintaining 96 % efficiency at low-humidity condition (10–25 % R. H.) for 1500 hours and over 95 % efficiency after annealing at 85 °C for 1000 hours.

AB - Inorganic cesium lead halide perovskites offer a pathway towards thermally stable photovoltaics. However, moisture-induced phase degradation restricts the application of hole transport layers (HTLs) with hygroscopic dopants. Dopant-free HTLs fail to realize efficient photovoltaics due to severe electrical loss. Herein, we developed an electrical loss management strategy by manipulating poly(3-hexylthiophene) with a small molecule, i.e., SMe-TATPyr. The developed P3HT/SMe-TATPyr HTL shows a three-time increase of carrier mobility owing to breaking the long-range ordering of “edge-on” P3HT and inducing the formation of “face-on” clusters, over 50 % decrease of the perovskite surface defect density, and a reduced voltage loss at the perovskite/HTL interface because of favorable energy level alignment. The CsPbI2Br perovskite solar cell demonstrates a record-high efficiency of 16.93 % for dopant-free HTL, and superior moisture and thermal stability by maintaining 96 % efficiency at low-humidity condition (10–25 % R. H.) for 1500 hours and over 95 % efficiency after annealing at 85 °C for 1000 hours.

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Electrical Loss Management by Molecularly Manipulating Dopant-free Poly(3-hexylthiophene) towards 16.93 % CsPbI₂Br Solar Cells

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