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Impact of Amine Add...
Impact of Amine Additives on Perovskite Precursor Aging : A Case Study of Light-Emitting Diodes
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- Xu, Yan (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,Shenzhen Univ, Peoples R China
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- Xu, Weidong (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Hu, Zhang-Jun (author)
- Linköpings universitet,Molekylär ytfysik och nanovetenskap,Tekniska fakulteten
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- Steele, Julian A. (author)
- Katholieke Univ Leuven, Belgium
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- Wang, Yang (author)
- Nanjing Univ Posts & Telecommun, Peoples R China
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- Zhang, Rui (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Zheng, Guanhaojie (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Li, Xiangchun (author)
- Nanjing Univ Posts & Telecommun, Peoples R China
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- Wang, Heyong (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Zhang, Xin (author)
- Linköpings universitet,Molekylär ytfysik och nanovetenskap,Tekniska fakulteten
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- Solano, Eduardo (author)
- ALBA Synchrotron Light Source, Spain
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- Roeffaers, Maarten B. J. (author)
- Katholieke Univ Leuven, Belgium
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- Uvdal, Kajsa (author)
- Linköpings universitet,Molekylär ytfysik och nanovetenskap,Tekniska fakulteten
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- Qing, Jian (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,Jinan Univ, Peoples R China
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- Zhang, Wenjing (author)
- Shenzhen Univ, Peoples R China
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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(creator_code:org_t)
- 2021-06-17
- 2021
- English.
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In: The Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185. ; 12:25, s. 5836-5843
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https://pubs.acs.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Amines are widely employed as additives for improving the performance of metal halide perovskite optoelectronic devices. However, amines are well-known for their high chemical reactivity, the impact of which has yet to receive enough attention from the perovskite light-emitting diode community. Here, by investigating an unusual positive aging effect of CH3NH3I/CsI/PbI2 precursor solutions as an example, we reveal that amines gradually undergo N-formylation in perovskite precursors over time. This reaction is initialized by hydrolysis of dimethylformamide in the acidic chemical environment. Further investigations suggest that the reaction products collectively impact perovskite crystallization and eventually lead to significantly enhanced external quantum efficiency values, increasing from similar to 2% for fresh solutions to greater than or similar to 12% for aged ones. While this case study provides a positive aging effect, a negative aging effect is possible in other perovksite systems. Our findings pave the way for more reliable and reproducible device fabrication and call for further attention to underlying chemical reactions within the perovskite inks once amine additives are included.
Subject headings
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Xu, Yan
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Xu, Weidong
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Hu, Zhang-Jun
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Steele, Julian A ...
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Wang, Yang
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Zhang, Rui
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Zheng, Guanhaoji ...
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Li, Xiangchun
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Wang, Heyong
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Zhang, Xin
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Solano, Eduardo
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Roeffaers, Maart ...
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Uvdal, Kajsa
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Qing, Jian
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Zhang, Wenjing
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Gao, Feng
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Other Chemistry ...
- Articles in the publication
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The Journal of P ...
- By the university
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Linköping University