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Role of chloride on...
Role of chloride on the instability of blue emitting mixed-halide perovskites
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- Karlsson, Max (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Qin, Jiajun (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Niu, Kaifeng (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten
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- Luo, Xiyu (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Tsinghua Univ, Peoples R China
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- Rosén, Johanna (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten
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- Björk, Jonas (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten
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- Duan, Lian (author)
- Tsinghua Univ, Peoples R China
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- Xu, Weidong (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Northwestern Polytech 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)
- HIGHER EDUCATION PRESS, 2023
- 2023
- English.
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In: FRONTIERS OF OPTOELECTRONICS. - : HIGHER EDUCATION PRESS. - 2095-2759. ; 16:1
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Although perovskite light-emitting diodes (PeLEDs) have seen unprecedented development in device efficiency over the past decade, they suffer significantly from poor operational stability. This is especially true for blue PeLEDs, whose operational lifetime remains orders of magnitude behind their green and red counterparts. Here, we systematically investigate this efficiency-stability discrepancy in a series of green- to blue-emitting PeLEDs based on mixed Br/Cl-perovskites. We find that chloride incorporation, while having only a limited impact on efficiency, detrimentally affects device stability even in small amounts. Device lifetime drops exponentially with increasing Cl-content, accompanied by an increased rate of change in electrical properties during operation. We ascribe this phenomenon to an increased mobility of halogen ions in the mixed-halide lattice due to an increased chemically and structurally disordered landscape with reduced migration barriers. Our results indicate that the stability enhancement for PeLEDs might require different strategies from those used for improving efficiency.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Ion migration; Blue electroluminescence; Mixed halide perovskites
Publication and Content Type
- ref (subject category)
- art (subject category)
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