Ligand-Modulated Excess PbI2 Nanosheets for Highly Efficient and Stable Perovskite Solar Cells

Ligand-Modulated Excess PbI2 Nanosheets for Highly Efficient and Stable Perovskite Solar Cells

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 21 vom: 27. Mai, Seite e2000865
1. Verfasser: Wang, Huanhuan (VerfasserIn)
Weitere Verfasser: Wang, Zaiwei, Yang, Zhen, Xu, Yuzeng, Ding, Yi, Tan, Liguo, Yi, Chenyi, Zhang, Zhuang, Meng, Ke, Chen, Gang, Zhao, Ying, Luo, Yongsong, Zhang, Xiaodan, Hagfeldt, Anders, Luo, Jingshan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article PbI2 ligand modulation perovskite solar cells
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520 |a Excess lead iodide (PbI2 ), as a defect passivation material in perovskite films, contributes to the longer carrier lifetime and reduced halide vacancies for high-efficiency perovskite solar cells. However, the random distribution of excess PbI2 also leads to accelerated degradation of the perovskite layer. Inspired by nanocrystal synthesis, here, a universal ligand-modulation technology is developed to modulate the shape and distribution of excess PbI2 in perovskite films. By adding certain ligands, perovskite films with vertically distributed PbI2 nanosheets between the grain boundaries are successfully achieved, which reduces the nonradiative recombination and trap density of the perovskite layer. Thus, the power conversion efficiency of the modulated device increases from 20% to 22% compared to the control device. In addition, benefiting from the vertical distribution of excess PbI2 and the hydrophobic nature of the surface ligands, the modulated devices exhibit much longer stability, retaining 72% of their initial efficiency after 360 h constant illumination under maximum power point tracking measurement 
650 4 |a Journal Article 
650 4 |a PbI2 
650 4 |a ligand modulation 
650 4 |a perovskite solar cells 
700 1 |a Wang, Zaiwei  |e verfasserin  |4 aut 
700 1 |a Yang, Zhen  |e verfasserin  |4 aut 
700 1 |a Xu, Yuzeng  |e verfasserin  |4 aut 
700 1 |a Ding, Yi  |e verfasserin  |4 aut 
700 1 |a Tan, Liguo  |e verfasserin  |4 aut 
700 1 |a Yi, Chenyi  |e verfasserin  |4 aut 
700 1 |a Zhang, Zhuang  |e verfasserin  |4 aut 
700 1 |a Meng, Ke  |e verfasserin  |4 aut 
700 1 |a Chen, Gang  |e verfasserin  |4 aut 
700 1 |a Zhao, Ying  |e verfasserin  |4 aut 
700 1 |a Luo, Yongsong  |e verfasserin  |4 aut 
700 1 |a Zhang, Xiaodan  |e verfasserin  |4 aut 
700 1 |a Hagfeldt, Anders  |e verfasserin  |4 aut 
700 1 |a Luo, Jingshan  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Advanced materials (Deerfield Beach, Fla.)  |d 1998  |g 32(2020), 21 vom: 27. Mai, Seite e2000865  |w (DE-627)NLM098206397  |x 1521-4095  |7 nnns 
773 1 8 |g volume:32  |g year:2020  |g number:21  |g day:27  |g month:05  |g pages:e2000865 
856 4 0 |u http://dx.doi.org/10.1002/adma.202000865  |3 Volltext 
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