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Effects of local compositional heterogeneity in mixed halide perovskites on blue electroluminescence
Linköpings universitet, Institutionen för fysik, kemi och biologi, Elektroniska och fotoniska material. Linköpings universitet, Tekniska fakulteten. Tsinghua Univ, Peoples R China.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Elektroniska och fotoniska material. Linköpings universitet, Tekniska fakulteten. Northwestern Polytech Univ, Peoples R China.ORCID-id: 0000-0002-0767-3086
Chinese Acad Sci, Peoples R China.
Tech Univ Chemnitz, Germany.
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2024 (Engelska)Ingår i: Matter, ISSN 2590-2393, E-ISSN 2590-2385, Vol. 7, nr 3Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Compositional heterogeneity is commonly observed in mixed bromide/iodide perovskite photoabsorbers, typically with minimal effects on charge carrier recombination and photovoltaic performance. Consistently, it has so far received very limited attention in bromide/chloride-mixed perovskites, which hold particular significance for blue light -emitting diodes. Here, we uncover that even a minor degree of localized halide heterogeneity leads to severe non -radiative losses in mixed bromide/chloride blue perovskite emitters, presenting a stark contrast to general observations in photovoltaics. We not only provide a visualization of the heterogeneity landscape spanning from micro -to sub-microscale but also identify that this issue mainly arises from the initially formed chloride -rich clusters during perovskite nucleation. Our work sheds light on a long-term neglected factor impeding the advancement of blue light -emitting diodes using mixed halide perovskites and provides a practical strategy to mitigate this issue.

Ort, förlag, år, upplaga, sidor
CELL PRESS , 2024. Vol. 7, nr 3
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URN: urn:nbn:se:liu:diva-202945DOI: 10.1016/j.matt.2023.12.019ISI: 001202419100001OAI: oai:DiVA.org:liu-202945DiVA, id: diva2:1853773
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Funding Agencies|National Natural Science Foundation of China [52250060, 62288102, 62274135, 51903137, 61890942]; Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-005]; DFG (Deutsche Forschungsgemeinschaft) [801847]; European Research Council (ERC) under the European Union [2018-07152]; Olle Engkvist Foundation; Swedish Research Council [2018-04969]; Swedish Governmental Agency for Innovation Systems [2019-02496]; Formas [UF150033]; Royal Society [EP/R023980/1]; Engineering and Physical Sciences Research Council (EPSRC) [EP/V06164X/1, EP/V027131/1, 756962]; Tata Group; European Research Council under the European Union [P2019-48758]; Nano Lund; Swedish Energy Agency Energimyndigheten [P2022-00394, 202006210284]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (faculty grant SFO-Mat-LiU); China Scholarship Council; Tsinghua Scholarship for short-term overseas graduate studies; [SPP 2196]; [2009-00971]

Tillgänglig från: 2024-04-23 Skapad: 2024-04-23 Senast uppdaterad: 2024-04-23

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Luo, XiyuXu, WeidongKarlsson, MaxYin, ChunyangZou, YataoZhao, HaifengGao, Feng
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Elektroniska och fotoniska materialTekniska fakulteten
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