BN量子点与双戊酸协同诱导生长的Rec.2020标准绿光CsPbBr_(3)纳米晶复合材料  

Rec.2020 Standard Green Light Emitting CsPbBr_(3)Nanocrystal Composites Based on Synergistic Induction Growth of BNQD and Glutaric Acid

作　　者：刘汉强 涂永华 魏俊青 谢杨杨 LIU Hanqiang;TU Yonghua;WEI Junqing;XIE Yangyang(Tianjin Key Laboratory of Thin Film Electronics and Communication Devices,School of Integrated Circuit Science and Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学集成电路科学与工程学院薄膜电子与通信器件天津市重点实验室,天津300384

出　　处：《发光学报》2025年第4期658-664,共7页Chinese Journal of Luminescence

基　　金：天津市自然科学基金(22JCQNJC00910);天津理工大学校级研究生科研创新实践项目(YJ2319)。

摘　　要：CsPbBr_(3)钙钛矿纳米晶具备出色的绿光发光特性和低成本制备优势,是有望满足超高清显示色域的重要材料。然而,由于元素成分比例和尺寸控制等多因素影响,CsPbBr_(3)钙钛矿纳米晶难以在530 nm附近形成窄绿光发射,从而与Rec.2020色域要求的标准绿光存在明显偏差。基于此,本工作在室温下以配体辅助再沉淀法为基础,通过在前驱体溶液中引入氮化硼量子点和双戊酸配体协同诱导纳米晶生长,合成了CsPbBr_(3)@BNQD纳米晶复合材料。双戊酸配体在纳米晶表面的锚定作用和BNQD纳米晶的宽禁带特性,使得所制备CsPbBr_(3)@BNQD纳米晶复合材料形成525 nm处的窄绿光发射,其半峰全宽为15.9 nm,发光效率高达78%,其CIE坐标(0.161,0.790)与Rec.2020标准绿色坐标几乎完全重合。此外,CsPbBr_(3)@BNQD纳米晶复合材料在LED片上封装应用中表现出良好的老化稳定性,为超高清显示的标准绿光技术提供了有效方案。CsPbBr_(3)perovskite nanocrystals possess outstanding green light emission and low-cost preparation,making them important materials that are expected to meet the color gamut requirements for ultra-high-definition displays.However,due to the influence of multiple factors such as the elemental composition ratio and size control,it is difficult for CsPbBr_(3)perovskite nanocrystals to form narrow green light emission near 530 nm,thus resulting in a significant deviation from the standard green light required by the Rec.2020 color gamut.In this work,CsPbBr_(3)@BNQD nanocrystal composites were synthesized by introducing boron nitride quantum dots(BNQD)and glutaric acid ligands into the precursor solution of ligand-assisted reprecipitation to synergistically induce the growth of nanocrystals.The anchoring effect of glutaric acid ligands on the surface of nanocrystals and the wide bandgap characteristics of BNQD nanocrystals enable the prepared CsPbBr_(3)@BNQD nanocrystal composites to exhibit narrow green light emission at 525 nm with a full width at half maximum(FWHM)of 15.9 nm and a high luminous efficiency of 78%.Moreover,its CIE coordinates(0.161,0.790)basically coincide with the standard green coordinates of Rec.2020.In addition,the CsPbBr_(3)@BNQD nanocrystal composites demonstrate good aging stability in the LED on-chip packaging application,providing an effective solution for the standard green light technology in ultra-high-definition displays.

关 键 词：钙钛矿纳米晶体 氮化硼量子点 复合材料 Rec.2020标准绿光 

分 类 号：O482.31[理学—固体物理]