Mn2+/Ce3+共掺钙钛矿量子点的光学特性研究

Optical Properties of Mn2+/Ce3+ Co-Doped Perovskite Quantum Dots

张建峰 ¹张瑞 ¹刘海运 ¹陈刚 ¹吕泽华 ¹张力夫¹

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作者信息

1. 太原科技大学应用科学学院,太原 030024
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摘要

针对Mn2+离子掺杂CsPbCl3量子点中发光效率低且铅毒性问题,采用改进的热注入法制备了(Mn,Ce)∶CsPbCl3量子点.利用Ce3+离子4f-5d本征跃迁导致的主晶格到Mn2+发射的能量转移,实现Mn2+发射增强.研究表明,稀土离子Ce3+的引入有助于提高激子到Mn2+的能量转移效率,从而提高量子点的光致发光量子效率.在PbCl2∶MnCl2∶CeCl3进料比为1∶1∶0.5时,量子产率为19％,较纯CsPbCl3量子点的发光效率提升了33倍.此外,制备了基于(Mn,Ce)∶CsPbCl3量子点复合荧光粉的白光发光二极管,对其电致发光强度、显色指数(CRI)和色温随着驱动电流的变化做了一定的研究,当驱动电流为20 mA时,色温为3 000 K,CRI为81.9.

Abstract

Aiming at the problems of low luminous efficiency and lead toxicity in Mn2+ion doped CsPbCl3 quantum dots,the(Mn,Ce)∶CsPbCl3 quantum dots were prepared by improved heat implantation method.The energy trans-fer from the main lattice to Mn2+emission caused by the 4f-5d intrinsic transition of Ce3+ions are used to enhance Mn2+emission.The results show that the introduction of rare earth ion Ce3+helps to improve the energy transfer ef-ficiency from exciton to Mn2+,so as to improve the photoluminescence quantum efficiency of quantum dots.When the feed ratio of PbCl2∶MnCl2∶CeCl3 is 1∶1∶0.5,the quantum yield is 19％,which is 33 times higher than that of pure CsPbCl3 quantum dots.Moreover,a white light-emitting diode based on(Mn,Ce)∶CsPbCl3 quantum dot com-posite phosphors was prepared.The changes of electroluminescence intensity,color rendering index(CRI)and col-or temperature with driving current were studied.When the driving current was 20 mA,the color temperature was 3 000 K,and the CRI was 81.9.

关键词

钙钛矿量子点/锰铈共掺杂/常压/稀土/LED

Key words

perovskite quantum dots/Co-doped of manganese and cerium/ambient air/rear earth/LED

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出版年

2024

太原科技大学学报

太原科技大学

太原科技大学学报

影响因子：0.342

ISSN：1673-2057

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