Cu掺杂CsPbBr_(3)钙钛矿纳米晶的制备及荧光性能研究  

Preperation and Fluorescence Properties of Cu-doped CsPbBr_(3) Perovskite Nanocrystals

作　　者：温鹏 陈婷 梁梦标 武文魁 厉有鹏 张春媚 赵梦迪 谢志翔 徐彦乔 WEN Peng;CHEN Ting;LIANG Mengbiao;WU Wenkui;LI Youpeng;ZHANG Chunmei;ZHAO Mengdi;XIE Zhixiang;XU Yanqiao(Institute of Materials Science&Devices,Suzhou University of Science and Technology,Suzhou 215009,China;School of Chemistry and Life Science,Suzhou University of Science and Technology,Suzhou 215009,China;School of Material Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333001,China)

机构地区：[1]苏州科技大学材料科学与器件研究院,苏州215009 [2]苏州科技大学化学与生命科学学院,苏州215009 [3]景德镇陶瓷大学材料科学与工程学院,景德镇333000

出　　处：《中国陶瓷》2025年第1期8-19,共12页China Ceramics

基　　金：国家自然科学基金项目(52062019,22202143);江苏省高等学校基础科学(自然科学)研究重大项目(24KJA430013);江苏省自然科学基金青年项目(BK20230662)。

摘　　要：CsPbX_(3)(X=Cl,Br,I)全无机钙钛矿纳米晶具有优异的光电特性,但其应用受到Pb^(2+)的毒性和晶胞的不稳定性等限制。过渡金属离子Cu^(2+)掺杂制备CsPb_(1-x)Cu_(x)Br_(3)纳米晶可以有效解决这一问题。采用分段加热法,掺杂一定量的Cu^(2+)使得CsPbBr_(3)晶胞收缩,同时提高荧光量子产率。当反应温度为130℃、Cu^(2+)掺杂量为5%时,CsPb_(1-x)Cu_(x)Br_(3)纳米晶的荧光量子产率达到74%,平均粒径为11.15±2.42 nm。与未掺杂的纳米晶相比,掺杂后CsPb_(0.95)Cu_(0.5)Br_(3)纳米晶的水稳定性、紫外光稳定性以及存储稳定性分别提高了37%、34%和28%。CsPb_(0.95)Cu_(0.05)Br_(3)纳米晶白光发光二极管器件的显色指数为54.3,流明效率和色温分别为43.2 lm/W和6512 K,色坐标为(0.33,0.34),其色域覆盖范围可达国家电视委员会标准的134.64%。CsPbX_(3)(X=Cl,Br,I)all inorganic perovskite nanocrystals have excellent optoelectronic properties,but their applications are limited by the toxicity of Pb^(2+)and the instability of the cell.Doping with transition metal ion Cu^(2+)to prepare CsPb_(1-x)Cu_(x)Br_(3)NCs can effectively solve this problem.By employing a segmented heating method and doping a certain amount of Cu^(2+),the crystal cell of CsPbBr_(3)shrinks while enhancing the photoluminescence quantum yield.When the reaction temperature is 130℃and the Cu^(2+)doping amount is 5%,the photoluminescence quantum yield of the CsPb_(1-x)Cu_(x)Br_(3)nanocrystals reaches 74%,and the average particle size of the sample shows 11.15±2.42 nm.Compared to the undoped nanocrystals,the water stability,ultraviolet stability,and storage stability of the doped CsPb_(0.95)Cu_(0.5)Br_(3)nanocrystals are improved by 37%,34%,and 28%,respectively.The white light-emitting diode device based on CsPb_(0.95)Cu_(0.05)Br_(3)NCs has a color rendering index of 54.3,a luminous efficiency and a correlated color temperature of 43.2 lm/W and 6512 K,respectively.The color coordinate of the WLED is(0.33,0.34)and its color gamut reaches 134.64%of the National Television System Committee standard.

关 键 词：全无机钙钛矿 金属离子 铜掺杂 量子产率 稳定性 

分 类 号：TQ174.75[化学工程—陶瓷工业]