Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells
Abstract Polymer hole‐transport layers (HTLs) are critical components of inverted perovskite solar cells (IPVSCs). Triphenylamine derivatives PTAA (poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine]) and Poly‐TPD (poly[N,N′‐bis(4‐butylphenyl)‐N,N′‐bis(phenyl)benzidine]) have been widely adopted as hole...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-04-01
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| Series: | Interdisciplinary Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/idm2.12023 |
| _version_ | 1798040584390180864 |
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| author | Yue‐Min Xie Qin Yao Qifan Xue Zixin Zeng Tianqi Niu Yingzhi Zhou Ming‐Peng Zhuo Sai‐Wing Tsang Hin‐Lap Yip Yong Cao |
| author_facet | Yue‐Min Xie Qin Yao Qifan Xue Zixin Zeng Tianqi Niu Yingzhi Zhou Ming‐Peng Zhuo Sai‐Wing Tsang Hin‐Lap Yip Yong Cao |
| author_sort | Yue‐Min Xie |
| collection | DOAJ |
| description | Abstract Polymer hole‐transport layers (HTLs) are critical components of inverted perovskite solar cells (IPVSCs). Triphenylamine derivatives PTAA (poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine]) and Poly‐TPD (poly[N,N′‐bis(4‐butylphenyl)‐N,N′‐bis(phenyl)benzidine]) have been widely adopted as hole‐transport materials due to their perovskite passivation effects and suitable energy levels. However, the passivation mechanism (i.e., the functional group responsible for perovskite passivation) of triphenylamine derivative polymers remains unclear, hindering the development and application of this polymer type. Here, we develop a novel Poly‐TPD derivative, S‐Poly‐TPD, by replacing the n‐butyl functional group of Poly‐TPD with an isobutyl group to explore the influence of alkyl groups on HTL performance and top‐deposited perovskite properties. Compared with Poly‐TPD, the increased CH3‐terminal unit density and the decreased spatial distance between the –CH–CH3 and –CH2–CH3 units and the benzene ring in S‐Poly‐TPD not only enhanced the hole‐transport ability but also improved the perovskite passivation effect, revealing for the first time the role of the alkyl groups in perovskite passivation. As a result, the S‐Poly‐TPD‐based IPVSCs demonstrated high power‐conversion efficiencies of 15.1% and 21.3% in wide‐bandgap [MAPbI2Br(SCN)0.12] and normal‐bandgap [(FAPbI3)0.92(MAPbBr3)0.08] devices, respectively. |
| first_indexed | 2024-04-11T22:09:41Z |
| format | Article |
| id | doaj.art-215f183e763340788d496f7aa167a241 |
| institution | Directory Open Access Journal |
| issn | 2767-441X |
| language | English |
| last_indexed | 2024-04-11T22:09:41Z |
| publishDate | 2022-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Interdisciplinary Materials |
| spelling | doaj.art-215f183e763340788d496f7aa167a2412022-12-22T04:00:36ZengWileyInterdisciplinary Materials2767-441X2022-04-011228129310.1002/idm2.12023Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cellsYue‐Min Xie0Qin Yao1Qifan Xue2Zixin Zeng3Tianqi Niu4Yingzhi Zhou5Ming‐Peng Zhuo6Sai‐Wing Tsang7Hin‐Lap Yip8Yong Cao9Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaDepartment of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaDepartment of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaInstitute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. ChinaAbstract Polymer hole‐transport layers (HTLs) are critical components of inverted perovskite solar cells (IPVSCs). Triphenylamine derivatives PTAA (poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine]) and Poly‐TPD (poly[N,N′‐bis(4‐butylphenyl)‐N,N′‐bis(phenyl)benzidine]) have been widely adopted as hole‐transport materials due to their perovskite passivation effects and suitable energy levels. However, the passivation mechanism (i.e., the functional group responsible for perovskite passivation) of triphenylamine derivative polymers remains unclear, hindering the development and application of this polymer type. Here, we develop a novel Poly‐TPD derivative, S‐Poly‐TPD, by replacing the n‐butyl functional group of Poly‐TPD with an isobutyl group to explore the influence of alkyl groups on HTL performance and top‐deposited perovskite properties. Compared with Poly‐TPD, the increased CH3‐terminal unit density and the decreased spatial distance between the –CH–CH3 and –CH2–CH3 units and the benzene ring in S‐Poly‐TPD not only enhanced the hole‐transport ability but also improved the perovskite passivation effect, revealing for the first time the role of the alkyl groups in perovskite passivation. As a result, the S‐Poly‐TPD‐based IPVSCs demonstrated high power‐conversion efficiencies of 15.1% and 21.3% in wide‐bandgap [MAPbI2Br(SCN)0.12] and normal‐bandgap [(FAPbI3)0.92(MAPbBr3)0.08] devices, respectively.https://doi.org/10.1002/idm2.12023alkyl groupinverted perovskite solar cells (IPVSCs)perovskite passivationpolymer hole transport layers (HTLs)Poly‐TPDPTAA |
| spellingShingle | Yue‐Min Xie Qin Yao Qifan Xue Zixin Zeng Tianqi Niu Yingzhi Zhou Ming‐Peng Zhuo Sai‐Wing Tsang Hin‐Lap Yip Yong Cao Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells Interdisciplinary Materials alkyl group inverted perovskite solar cells (IPVSCs) perovskite passivation polymer hole transport layers (HTLs) Poly‐TPD PTAA |
| title | Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells |
| title_full | Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells |
| title_fullStr | Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells |
| title_full_unstemmed | Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells |
| title_short | Subtle side chain modification of triphenylamine‐based polymer hole‐transport layer materials produces efficient and stable inverted perovskite solar cells |
| title_sort | subtle side chain modification of triphenylamine based polymer hole transport layer materials produces efficient and stable inverted perovskite solar cells |
| topic | alkyl group inverted perovskite solar cells (IPVSCs) perovskite passivation polymer hole transport layers (HTLs) Poly‐TPD PTAA |
| url | https://doi.org/10.1002/idm2.12023 |
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