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ShanghaiTech University Knowledge Management System
| Disentangling perovskite surface work functions and electron extraction energy offsets to drive high photovoltaic efficiency | |
Xiong, Shaobing1,2; Li, Di1; Xie, Junhan3  ; Wu, Hongbo4; Ma, Zaifei4; Li, Bo1; Liu, Xianjie5; Fahlman, Mats5; Chu, Junhao2; Pan, Caofeng6,7; Bao, Qinye1,8; Xiong, Shaobing9,10; Li, Di9; Xie, Junhan11; Wu, Hongbo12; Ma, Zaifei12; Li, Bo9; Liu, Xianjie13; Fahlman, Mats13; Chu, Junhao10; Pan, Caofeng14,15; Bao, Qinye9,16
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| 2025 | |
| 发表期刊 | SCIENCE BULLETIN (IF:18.8[JCR-2023],15.8[5-Year]) |
| ISSN | 2095-9273 |
| EISSN | 2095-9281 |
| 发表状态 | 已发表 |
| DOI | 10.1016/j.scib.2025.03.034 |
| 摘要 | Reducing nonradiative recombination is a main challenge in manufacturing highly efficient optoelectronic devices. Perovskite solar cells (PSCs) typically feature significant nonradiative recombination originating from energetic mismatch at the charge-extracting contact. Here, we widely manipulate the energy offset between the perovskite conduction band minimum (CBM) and the electron transporting state of the fullerene cathode interface layer in p-i-n PSCs by modifying the perovskite surface work function with defect-passivating self-assembled monolayers (SAMs) inducing surface dipoles. It is found that reducing the energy offset for electron extraction at such perovskite/fullerene electron-selective heterointerface from 0.98 to −0.02 eV yields a clear linear improvement in PSC built-in potential, with fill factor, photovoltage and power conversion efficiency all increasing as well. We further demonstrate that the improved photovoltaic performance is attributed to reduced energy offsets between the perovskite CBM and the fullerene electron accepting state, which accelerates electron extraction from perovskite and thus effectively suppresses nonradiative recombination. Moreover, the models of corresponding energy level alignment are proposed to discuss the impacts on PSC performance. Our work highlights the importance of tuning the work function even for defect-passivated perovskite surfaces to achieve barrier-less charge extraction and thus boost PSC performance. © 2025 Science China Press |
| 关键词 | Conduction bands Conversion efficiency Electron transport properties Hard facing Indium compounds Light absorption Self assembled monolayers Solar power generation Conduction-band minimum Electron extraction Electron-transporting Energy offset Function extraction Nonradiative recombination Optoelectronics devices Photo-voltaic efficiency Solar cell performance Surface work functions |
| 收录类别 | EI |
| 语种 | 英语 |
| 出版者 | Elsevier B.V. |
| EI入藏号 | 20251418170242 |
| EI主题词 | Perovskite solar cells |
| EI分类号 | 201.1.1 Metallurgy - 208.1 Coating Techniques - 208.4 Thin films - 702.3 Solar Cells - 741.1 Light/Optics - 804.2 Inorganic Compounds - 1008.4 Solar Energy Conversion and Power Generation - 1009.2 Energy Consumption - 1301.1.3 Atomic and Molecular Physics - 1301.4 Solid State Physics |
| 原始文献类型 | Article in Press |
| 文献类型 | 期刊论文 |
| 条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/510729 |
| 专题 | 物质科学与技术学院 物质科学与技术学院_博士生 |
| 通讯作者 | Fahlman, Mats; Fahlman, Mats |
| 作者单位 | 1.School of Physics and Electronic Science, East China Normal University, Shanghai; 200241, China; 2.Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai; 200433, China; 3.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 4.Center for Advanced Low-Dimension Materials, Donghua University, Shanghai; 201620, China; 5.Laboratory of Organic Electronics, Linköping University, Norrköping; 60174, Sweden; 6.Institute of Atomic Manufacturing, Beihang University, Beijing; 100191, China; 7.International Research Institute for Multidisciplinary Science, Beihang University, Beijing; 100191, China; 8.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 9.School of Physics and Electronic Science, East China Normal University, Shanghai; 200241, China; 10.Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai; 200433, China; 11.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 12.Center for Advanced Low-Dimension Materials, Donghua University, Shanghai; 201620, China; 13.Laboratory of Organic Electronics, Linköping University, Norrköping; 60174, Sweden; 14.Institute of Atomic Manufacturing, Beihang University, Beijing; 100191, China; 15.International Research Institute for Multidisciplinary Science, Beihang University, Beijing; 100191, China; 16.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China |
| 推荐引用方式 GB/T 7714 | Xiong, Shaobing,Li, Di,Xie, Junhan,et al. Disentangling perovskite surface work functions and electron extraction energy offsets to drive high photovoltaic efficiency[J]. SCIENCE BULLETIN,2025. |
| APA | Xiong, Shaobing.,Li, Di.,Xie, Junhan.,Wu, Hongbo.,Ma, Zaifei.,...&Bao, Qinye.(2025).Disentangling perovskite surface work functions and electron extraction energy offsets to drive high photovoltaic efficiency.SCIENCE BULLETIN. |
| MLA | Xiong, Shaobing,et al."Disentangling perovskite surface work functions and electron extraction energy offsets to drive high photovoltaic efficiency".SCIENCE BULLETIN (2025). |
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