Ligand Assisted Control of Photoluminescence in Organometal Perovskite Nanocrystals

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY

Eurasian Chemico-Technological Journal Pub Date : 2021-08-30 DOI:10.18321/ectj1078

K. Sekerbayev, G. K. Mussabek, Yerkin Shabdan, Y. Taurbayev

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引用次数: 0

Abstract

Organometal perovskite nanocrystals have shown remarkable properties not only in photovoltaics, but also in light-emitting devices. In this work colloidal nanocrystals of organometal perovskite CH3NH3PbBr3 (MAPBr) with effective visible photoluminescence were synthesized by the ligand assisted reprecipitation method. The studies were carried out by photoluminescence spectroscopy and optical transmission spectroscopy. Analysis of the photoluminescence and transmission spectra showed that by changing the concentration of the ligands oleylamine and octylamine, it is possible to control the size of nanocrystals and the photoluminescence wavelength due to the quantum confinement effect. It was shown that the increase in ligands concentration in MAPBr perovskite nanocrystals (NCs) solutions decreases the width of the peak which indicates a better quality of the obtained nanocrystals. An increase in the band gap indicates a decrease in the size of the nanocrystals. Replacing the ligands in the colloidal perovskite NCs solutions leads to shift of the photoluminescence peak from 456 to 535 nm.

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配体辅助控制有机金属钙钛矿纳米晶体的光致发光

有机金属钙钛矿纳米晶体不仅在光伏发电中，而且在发光器件中都表现出了显著的性能。本工作采用配体辅助再沉淀法合成了具有有效可见光致发光的有机金属钙钛矿CH3NH3PbBr3（MAPBr）胶体纳米晶体。利用光致发光光谱和透射光谱进行了研究。光致发光和透射光谱的分析表明，通过改变配体油胺和辛胺的浓度，由于量子限制效应，可以控制纳米晶体的尺寸和光致发光波长。结果表明，MAPBr钙钛矿纳米晶体（NCs）溶液中配体浓度的增加降低了峰的宽度，这表明所获得的纳米晶体的质量更好。带隙的增加表明纳米晶体的尺寸减小。取代胶体钙钛矿NCs溶液中的配体导致光致发光峰从456 nm移动到535 nm。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Eurasian Chemico-Technological Journal CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

20.00%

发文量

审稿时长

20 weeks

期刊介绍： The journal is designed for publication of experimental and theoretical investigation results in the field of chemistry and chemical technology. Among priority fields that emphasized by chemical science are as follows: advanced materials and chemical technologies, current issues of organic synthesis and chemistry of natural compounds, physical chemistry, chemical physics, electro-photo-radiative-plasma chemistry, colloids, nanotechnologies, catalysis and surface-active materials, polymers, biochemistry.