A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells
The hole-transport layer (HTL) plays a pivotal role in engineering high-performance inverted perovskite solar cells (PSCs), as it governs both hole extraction/transport dynamics and critically impacts the crystallization quality of the perovskite absorber layer in device architectures. Recent advanc...
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| author | Yuchen Yuan Houlin Li Haiqiang Luo Yang Zhang Xiaoli Li Ting Jiang Yajie Yang Lei Liu Baoyan Fan Xia Hao |
| author_facet | Yuchen Yuan Houlin Li Haiqiang Luo Yang Zhang Xiaoli Li Ting Jiang Yajie Yang Lei Liu Baoyan Fan Xia Hao |
| author_sort | Yuchen Yuan |
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| description | The hole-transport layer (HTL) plays a pivotal role in engineering high-performance inverted perovskite solar cells (PSCs), as it governs both hole extraction/transport dynamics and critically impacts the crystallization quality of the perovskite absorber layer in device architectures. Recent advancements have highlighted self-assembled monolayers (SAMs) as promising candidates for next-generation HTL materials in inverted PSCs due to their intrinsic advantages over conventional counterparts. These molecularly engineered interfaces demonstrate superior characteristics including simplified purification processes, tunable molecular structures, and enhanced interfacial compatibility with device substrates. This review systematically examines the progress, existing challenges, and future prospects of SAM-based HTLs in inverted photovoltaic systems, aiming to establish a systematic framework for understanding their structure–property relationships. The review is organized into three sections: (1) fundamental architecture of inverted PSCs, (2) molecular design principles of SAMs with emphasis on head-group functionality, and (3) recent breakthroughs in SAM-engineered HTLs and their modification strategies for HTL optimization. Through critical analysis of performance benchmarks and interfacial engineering approaches, we elucidate both the technological merits and inherent limitations of SAM implementation in photovoltaic devices. Furthermore, we propose strategic directions for advancing SAM-based HTL development, focusing on molecular customization and interfacial engineering to achieve device efficiency and stability targets. This comprehensive work aims to establish a knowledge platform for accelerating the rational design of SAM-modified interfaces in next-generation optoelectronic devices. |
| format | Article |
| id | doaj-art-d735723fab6c4fc9bcd3d3baf7adc2f9 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj-art-d735723fab6c4fc9bcd3d3baf7adc2f92025-08-20T03:47:48ZengMDPI AGEnergies1996-10732025-05-011810257710.3390/en18102577A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar CellsYuchen Yuan0Houlin Li1Haiqiang Luo2Yang Zhang3Xiaoli Li4Ting Jiang5Yajie Yang6Lei Liu7Baoyan Fan8Xia Hao9Institute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Materials and New Energy, Chongqing University of Science and Technology, Chongqing 401331, ChinaInstitute of New Energy and Low-Carbon Technology, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaThe hole-transport layer (HTL) plays a pivotal role in engineering high-performance inverted perovskite solar cells (PSCs), as it governs both hole extraction/transport dynamics and critically impacts the crystallization quality of the perovskite absorber layer in device architectures. Recent advancements have highlighted self-assembled monolayers (SAMs) as promising candidates for next-generation HTL materials in inverted PSCs due to their intrinsic advantages over conventional counterparts. These molecularly engineered interfaces demonstrate superior characteristics including simplified purification processes, tunable molecular structures, and enhanced interfacial compatibility with device substrates. This review systematically examines the progress, existing challenges, and future prospects of SAM-based HTLs in inverted photovoltaic systems, aiming to establish a systematic framework for understanding their structure–property relationships. The review is organized into three sections: (1) fundamental architecture of inverted PSCs, (2) molecular design principles of SAMs with emphasis on head-group functionality, and (3) recent breakthroughs in SAM-engineered HTLs and their modification strategies for HTL optimization. Through critical analysis of performance benchmarks and interfacial engineering approaches, we elucidate both the technological merits and inherent limitations of SAM implementation in photovoltaic devices. Furthermore, we propose strategic directions for advancing SAM-based HTL development, focusing on molecular customization and interfacial engineering to achieve device efficiency and stability targets. This comprehensive work aims to establish a knowledge platform for accelerating the rational design of SAM-modified interfaces in next-generation optoelectronic devices.https://www.mdpi.com/1996-1073/18/10/2577inverted perovskite solar cellsself-assembled monolayershole-transport layercarrier transport efficiency |
| spellingShingle | Yuchen Yuan Houlin Li Haiqiang Luo Yang Zhang Xiaoli Li Ting Jiang Yajie Yang Lei Liu Baoyan Fan Xia Hao A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells Energies inverted perovskite solar cells self-assembled monolayers hole-transport layer carrier transport efficiency |
| title | A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells |
| title_full | A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells |
| title_fullStr | A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells |
| title_full_unstemmed | A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells |
| title_short | A Comprehensive Review of Self-Assembled Monolayers as Hole-Transport Layers in Inverted Perovskite Solar Cells |
| title_sort | comprehensive review of self assembled monolayers as hole transport layers in inverted perovskite solar cells |
| topic | inverted perovskite solar cells self-assembled monolayers hole-transport layer carrier transport efficiency |
| url | https://www.mdpi.com/1996-1073/18/10/2577 |
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