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Tailoring quasi-2D perovskite thin films via nanocrystals mediation for enhanced electroluminescence
Tanghao Liu1; Zhipeng Zhang1; Qi Wei1; Bingzhe Wang1; Kaiyang Wang1; Jia Guo1; Chao Liang1; Dandan Zhao1; Shi Chen1; Yuxin Tang1; Yuanyuan Zhou2; Guichuan Xing1
2021-05
Source PublicationChemical Engineering Journal
ISSN1385-8947
Volume411Pages:128511
Abstract

Quasi-2D halide perovskites have recently emerged as a promising family of semiconducting materials for light-emitting applications. However, these materials usually consist of mixed 2D-3D perovskite phases with rarely controlled distributions when processed into thin films. Such film structures can be detrimental to carrier transport and transfer, limiting the electroluminescent properties and light-emitting device performance. In this work, we tailor the solution crystallization of quasi-2D perovskites with a nanocrystals-mediation strategy, which leads to high-quality, low-defect-density quasi-2D perovskite films with uniformly mixed 2D-3D perovskite phases. Mechanistic insights gained from ultrafast spectroscopic studies reveal a highly enhanced carrier funnelling process in such nanocrystals-mediated films, which results in a threefold increase in the electroluminescence efficiency compared with the pristine thin pristine films. This work demonstrates the promise of a potentially versatile approach in using nanocrystals to manipulate the functional properties of quasi-2D perovskite thin films.

KeywordCarrier Funnelling Defect Density Electroluminescence Nanocrystals Quasi-2d Perovskite
DOI10.1016/j.cej.2021.128511
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000624521200005
PublisherELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Scopus ID2-s2.0-85099793628
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorYuanyuan Zhou; Guichuan Xing
Affiliation1.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Taipa,China
2.Department of Physics,Hong Kong Baptist University,Kowloon,Hong Kong
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Tanghao Liu,Zhipeng Zhang,Qi Wei,et al. Tailoring quasi-2D perovskite thin films via nanocrystals mediation for enhanced electroluminescence[J]. Chemical Engineering Journal,2021,411:128511.
APA Tanghao Liu,Zhipeng Zhang,Qi Wei,Bingzhe Wang,Kaiyang Wang,Jia Guo,Chao Liang,Dandan Zhao,Shi Chen,Yuxin Tang,Yuanyuan Zhou,&Guichuan Xing.(2021).Tailoring quasi-2D perovskite thin films via nanocrystals mediation for enhanced electroluminescence.Chemical Engineering Journal,411,128511.
MLA Tanghao Liu,et al."Tailoring quasi-2D perovskite thin films via nanocrystals mediation for enhanced electroluminescence".Chemical Engineering Journal 411(2021):128511.
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