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Hybrid Perovskite Light-Emitting Diodes Based on Perovskite Nanocrystals with Organic-Inorganic Mixed Cations
Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China.;Nanyang Technol Univ, Sch Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore..
Nanyang Technol Univ, Sch Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore..
Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
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2017 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 29, no 18, 1606405Article in journal (Refereed) Published
Abstract [en]

Organic-inorganic hybrid perovskite materials with mixed cations have demonstrated tremendous advances in photovoltaics recently, by showing a significant enhancement of power conversion efficiency and improved perovskite stability. Inspired by this development, this study presents the facile synthesis of mixed-cation perovskite nanocrystals based on FA((1-x))Cs(x)PbBr(3) (FA = CH(NH2)(2)). By detailed characterization of their morphological, optical, and physicochemical properties, it is found that the emission property of the perovskite, FA((1-x))Cs(x)PbBr(3), is significantly dependent on the substitution content of the Cs cations in the perovskite composition. These mixed-cation perovskites are employed as light emitters in light-emitting diodes (LEDs). With an optimized composition of FA(0.8)Cs(0.2)PbBr(3), the LEDs exhibit encouraging performance with a highest reported luminance of 55 005 cd m(-2) and a current efficiency of 10.09 cd A(-1). This work provides important instructions on the future compositional optimization of mixed-cation perovskite for obtaining high-performance LEDs. The authors believe this work is a new milestone in the development of bright and efficient perovskite LEDs.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2017. Vol. 29, no 18, 1606405
National Category
Physical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-323024DOI: 10.1002/adma.201606405ISI: 000400636400018OAI: oai:DiVA.org:uu-323024DiVA: diva2:1104928
Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-02Bibliographically approved

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