Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/12418
Title: Improvement of photophysical properties of CsPbBr3 and Mn2+:CsPb(Br,Cl)(3) perovskite nanocrystals by Sr2+ doping for white light-emitting diodes
Authors: Yüce, Hürriyet
Mandal, Mukunda
Yalçınkaya, Yenal
Andrienko, Denis
Demir, Mustafa Muammer
Keywords: Transition metals
Perovskites
Diffraction
Nanocrystals
Publisher: American Chemical Society
Abstract: All-inorganic metal halide perovskite nanocrystals (NCs) having the general formula ABX(3), where A is a monovalent cation, for example, Cs+, B is a divalent cation, typically Pb2+, and X is Cl-, Br-, I-, or their binary mixture, show potential in optoelectronic devices. In this work, we explore the effect of B-site doping on the optoelectronic properties of CsPbX3 NCs (X = Br, Cl). First, the Pb2+ ions in the pristine CsPbBr3 NC are partially substituted by Mn2+ ions. The alkaline earth metal strontium is then doped on both pristine and the Mn2+-substituted NCs. We found that a small percentage of Sr2+ doping remarkably improves the photoluminescence quantum yield of CsPbBr3 and Mn2+-state emission in Mn2+:CsPb(Br,Cl)(3) NCs. Perovskite NC film/ poly(methyl methacrylate) composites with all four NC variants were used in a white light-emitting diode (WLED), where Sr2+ doping increased the luminous efficiency of the WLED by similar to 4.7%. We attribute this performance enhancement to a reduced defect density and an attenuated microstrain in the local NC structure.
Description: Article; Early Access
URI: http://dx.doi.org/10.1021/acs.jpcc.2c01244
https://hdl.handle.net/11147/12418
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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