Author
Listed:
- Jaemin Kong
(New York University Tandon School of Engineering)
- Yongwoo Shin
(Samsung Semiconductor, Inc.)
- Jason A. Röhr
(New York University Tandon School of Engineering)
- Hang Wang
(New York University Tandon School of Engineering)
- Juan Meng
(New York University Tandon School of Engineering)
- Yueshen Wu
(Yale University)
- Adlai Katzenberg
(New York University Tandon School of Engineering)
- Geunjin Kim
(Korea Research Institute of Chemical Technology (KRICT))
- Dong Young Kim
(Samsung Electronics)
- Tai-De Li
(The Graduate Center of the City University of New York
City College of New York)
- Edward Chau
(New York University Tandon School of Engineering)
- Francisco Antonio
(Yale University)
- Tana Siboonruang
(New York University Tandon School of Engineering)
- Sooncheol Kwon
(Wonkwang University)
- Kwanghee Lee
(Gwangju Institute of Science and Technology (GIST)
Gwangju Institute of Science and Technology (GIST))
- Jin Ryoun Kim
(New York University Tandon School of Engineering)
- Miguel A. Modestino
(New York University Tandon School of Engineering)
- Hailiang Wang
(Yale University)
- André D. Taylor
(New York University Tandon School of Engineering
Yale University)
Abstract
In perovskite solar cells, doped organic semiconductors are often used as charge-extraction interlayers situated between the photoactive layer and the electrodes. The π-conjugated small molecule 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9-spirobifluorene (spiro-OMeTAD) is the most frequently used semiconductor in the hole-conducting layer1–6, and its electrical properties considerably affect the charge collection efficiencies of the solar cell7. To enhance the electrical conductivity of spiro-OMeTAD, lithium bis(trifluoromethane)sulfonimide (LiTFSI) is typically used in a doping process, which is conventionally initiated by exposing spiro-OMeTAD:LiTFSI blend films to air and light for several hours. This process, in which oxygen acts as the p-type dopant8–11, is time-intensive and largely depends on ambient conditions, and thus hinders the commercialization of perovskite solar cells. Here we report a fast and reproducible doping method that involves bubbling a spiro-OMeTAD:LiTFSI solution with CO2 under ultraviolet light. CO2 obtains electrons from photoexcited spiro-OMeTAD, rapidly promoting its p-type doping and resulting in the precipitation of carbonates. The CO2-treated interlayer exhibits approximately 100 times higher conductivity than a pristine film while realizing stable, high-efficiency perovskite solar cells without any post-treatments. We also show that this method can be used to dope π-conjugated polymers.
Suggested Citation
Jaemin Kong & Yongwoo Shin & Jason A. Röhr & Hang Wang & Juan Meng & Yueshen Wu & Adlai Katzenberg & Geunjin Kim & Dong Young Kim & Tai-De Li & Edward Chau & Francisco Antonio & Tana Siboonruang & Soo, 2021.
"CO2 doping of organic interlayers for perovskite solar cells,"
Nature, Nature, vol. 594(7861), pages 51-56, June.
Handle:
RePEc:nat:nature:v:594:y:2021:i:7861:d:10.1038_s41586-021-03518-y
DOI: 10.1038/s41586-021-03518-y
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Citations
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Cited by:
- Dongdong Xu & Zhiming Gong & Yue Jiang & Yancong Feng & Zhen Wang & Xingsen Gao & Xubing Lu & Guofu Zhou & Jun-Ming Liu & Jinwei Gao, 2022.
"Constructing molecular bridge for high-efficiency and stable perovskite solar cells based on P3HT,"
Nature Communications, Nature, vol. 13(1), pages 1-8, December.
- Luning Wang & Sui Yang & Tingting Xi & Qingchen Yang & Jie Yi & Hongxing Li & Jianxin Zhong, 2023.
"Performance Optimization of CsPb(I 1–x Br x ) 3 Inorganic Perovskite Solar Cells with Gradient Bandgap,"
Energies, MDPI, vol. 16(10), pages 1-15, May.
- Junsheng Luo & Bowen Liu & Haomiao Yin & Xin Zhou & Mingjian Wu & Hongyang Shi & Jiyun Zhang & Jack Elia & Kaicheng Zhang & Jianchang Wu & Zhiqiang Xie & Chao Liu & Junyu Yuan & Zhongquan Wan & Thomas, 2024.
"Polymer-acid-metal quasi-ohmic contact for stable perovskite solar cells beyond a 20,000-hour extrapolated lifetime,"
Nature Communications, Nature, vol. 15(1), pages 1-9, December.
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