温州大学化学与材料工程学院

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祝贺梁晓娟和向卫东老师指导研究生何美玲在Journal of the American Ceramic Society上发表学术论文

发布时间:2018-11-30    来源:化学与材料工程学院    作者:    点击次    [点击关闭]

标题(中文):锰掺杂氯溴铅铯量子点微晶玻璃的制备:双光发射和良好的热稳定性

标题(英文):Doping manganese into CsPb(Cl/Br)3 quantum dots glasses: Dual-color emission and super thermal stability

刊物名称及期号、页码:Journal of the American Ceramic Society 2018 DOI: doi.org/10.1111/jace.15945.

作者姓名(中文):何美玲,程银子,沈琳俐,张慧灵,沈晨阳,向卫东*,梁晓娟*

作者姓名(英文):Meiling He, Yinzi Cheng, Linli Shen, Huiling Zhang, Chenyang Shen, Weidong Xiang*, Xiaojuan Liang*

摘要:CsPbX3 (X=Cl, Br, I) perovskite quantum dots (QDs) represent bright and tunable photoluminescence, it is regrettable that the air instability and poor water resistant properties prevent their application in optoelectronic devices. At the same time, the toxicity of lead is also a major factor restricting its development. As a consequence, we demonstrate the partial replacement of Pb with Mn through conventional melt-quenching and heat-treatment method preparation of Mn-doped CsPb(Cl/Br)3 QD glass. Mn-doped CsPb(Cl/Br)3 QD glass exhibits high luminescent intensity like QDs. It is important that Mn-doped CsPb(Cl/Br)3 QD glass with Dual-Color maintained the same lattice structure like Mn-doped CsPb(Cl/Br)3 QDs, and highly homogeneous spectral characteristics of Mn luminescence. The intensity and position of this Mn-related emission are also tunable by altering the experimental parameters, such as the Pb-to-Mn feed ratio, annealing temperature. More importantly, the as-prepared orange Mn-doped CsPb(Cl/Br)3 QD glass was employed to fabricate white LEDs combined with a commercial Ce3+:Y3Al5O12 phosphor-in-glass (Ce-PiG) on top of a InGaN blue chip. And the constructed WLEDs generate a warm white with an optimal luminous efficacy (LE) of 67.00 l m/W, a high CRI of 81.4 , and a low CCT of 4902 K.

研究现状:量子点溶液具有很多优异的光学性能,但是它们容易被极性溶剂破坏,特别是在水环境中,因此如何提高稳定性是许多学者研究的重点。本篇文章中,我们使用熔融淬灭和热处理的方法,成功地在硼硅锌(ZnO-B2O3-SiO2, ZBS)玻璃中析出了橙色的Mn-doped CsPb(Cl/Br)3量子点。橙红色的微晶玻璃可以作为一种红色的荧光材料应用与白光LED中。

创新点:为了解决量子点溶液的不稳定性,可以将量子点溶液制备成薄膜或者粉体,这些方法一定程度上可以提高量子点的稳定性,但目前的复合材料还具有一定的缺陷。微晶玻璃是新型微晶材料的一种,它是通过基础玻璃或其它材料在加热过程中进行控制晶化而得到的一种中含有大量微晶体和玻璃体的复合固体材料。本文中制备的微晶玻璃不仅很好的保持了量子点的荧光特性,而且提高了量子点在空气中和水中的稳定性。这是第一次锰掺杂卤化铅铯量子点微晶玻璃的制备。

原文链接:https://doi.org/10.1111/jace.15945