Zr^(4+)掺杂CsPbI_(3)钙钛矿量子点玻璃的光学性能  

Optical Properties of Zr^(4+) Doped CsPbI_(3)Perovskite Quantum Dots Glass

作　　者：许周速[1] 王鹏[1] 杨伊健 郑国君 满涛 王阳明 刘小峰[5] 邱建荣[3] XU Zhousu;WANG Peng;YANG Yijian;ZHENG Guojun;MAN Tao;WANG Yangming;LIU Xiaofeng;QIU Jianrong(Institute of Intelligent Optoelectronic Technology,Zhejiang University of Technology,Hangzhou 310023,China;College of Electrical Engineering and Computer Sciences,Ningbo University,Ningbo 315211,Zhejiang,China;College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China;College of Computer Science and Technology,Zhejiang University of Technology,Hangzhou 310023,China;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China.)

机构地区：[1]浙江工业大学光电子智能化技术研究所,杭州310023 [2]宁波大学信息科学与工程学院,浙江宁波315211 [3]浙江大学光电科学与工程学院,杭州310027 [4]浙江工业大学计算机科学与技术学院,杭州310023 [5]浙江大学材料科学与工程学院,杭州310027

出　　处：《硅酸盐学报》2024年第8期2606-2614,共9页Journal of The Chinese Ceramic Society

基　　金：浙江省自然科学基金(LZ24F050009,LR21E020005);国家自然科学基金(12304443,62175210,U20A20211);区域光纤通信网与新型光通信系统国家重点实验室开放基金(上海交通大学,2023GZKF016)。

摘　　要：钙钛矿量子点具有优异的光电性能,有望应用于显示、光伏和光电探测等领域,然而,较差的稳定性限制其应用,将钙钛矿量子点嵌入到玻璃中可以有效地提升其稳定性。采用高温熔融–热处理方法制备了Zr^(4+)掺杂CsPbI_(3)量子点硼硅酸盐玻璃。结果表明:CsPbI_(3)量子点在玻璃内部析出,并且随着ZrO_(2)含量增加,由于较小直径的Zr^(4+)取代了较大直径的Pb^(2+),(200)晶面的衍射峰向大角度偏移;随着ZrO_(2)含量的增加,发光峰和吸收边均出现蓝移,荧光强度和量子效率先增大后减小,荧光寿命逐渐减小;随着ZrO_(2)含量增加,玻璃中[BO_(4)]和[SiO_(4)]四面体网络结构增加,导致玻璃三维网络结构增加,从而抑制了CsPbI_(3)量子点的析晶。本工作表明所制备的玻璃具有良好的热稳定性,能够应用于显示、照明等领域。Introduction In recent years,all-inorganic halide perovskite(CsPbX_(3),X=Cl,Br,I)quantum dots(QDs)have attracted widespread attention due to their excellent optical and electrical properties.They exhibit high photoluminescence(PL)efficiency,narrow emission bandwidth and tunable emission energy at a wide spectral range.However,the poor stability of CsPbX_(3)QDs under ambient conditions strongly limit their applications.In this work,CsPbI_(3)QD-doped borosilicate glasses were prepared by high-temperature melting-quenching followed by heat treatment.ZrO_(2)is employed as the network modifier,which effectively modifies the local network structure of glass.By optimizing the concentration of ZrO_(2)and the heat treatment temperature or time,the PL efficiency of the glass can be effectively improved.PL intensity of the QDs glass sample demonstrates high stability,which is almost unchanged after multiple heating and cooling cycles between 293 K and 373 K.Methods The CsPbI_(3)QD-doped glasses were prepared by high-temperature melting-quenching followed by heat treatment.All raw materials with the designed ratios were accurately weighed and mixed in an agate mortar for 20 min.After the raw materials were thoroughly mixed,they were placed in a covered alumina crucible and transferred to a muffle furnace for melting at 1200℃for 20 min.Afterwards,the glass melt was quenched onto a steel plate and pressed into a glass plate.Finally,the precursor glass were heat-treated at different temperatures(520–550℃)for 4 h and at 530℃for different times(2–12 h)to precipitate the CsPbI_(3)QDs.PL spectra,PL decay curves and thermal stability of glass samples were examined with a FLS 980 fluorescence spectrometer.Optical absorption spectra were recorded by using a UV-3600UV-Vis-NIR spectrometer.X-ray diffraction patterns were recorded by using an X’Pert PRO powder diffractometer.The network structure of glass was analyzed by using a Nicolet 6700 spectrometer andan InVia Reflex Raman spectrometer.The photoluminescence quantum yiel

关 键 词：锆离子 量子点 硼硅酸盐玻璃 析晶 

分 类 号：TQ171.1[化学工程—玻璃工业]