稀土Er^(3+)离子掺杂的全无机CsPbCl_(3)钙钛矿纳米晶的合成及发光性能  

Synthesis and Photoluminescent Properties of Rare Earth Er^(3+)-Doped All-Inorganic CsPbCl_(3)Perovskite Nanocrystals

作　　者：王沐伊 李会利[1] Wang Muyi;Li Huili(Engineering Research Center for Nanophotonics&Advanced Instruments of Ministry of Education,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学物理与电子科学学院纳光电集成与先进装备教育部工程研究中心,上海200241

出　　处：《微纳电子技术》2023年第10期1608-1618,共11页Micronanoelectronic Technology

摘　　要：CsPbCl_(3)全无机钙钛矿纳米晶(PNC)的应用受到其弱发光、极低的光致发光量子产率(PLQY)以及长期暴露于氧气和湿气环境中稳定性差等的限制。为了解决这一问题,使用稀土金属元素铒的三价阳离子(Er^(3+))作为B位掺杂元素,制备出了明亮蓝紫光发射的Er^(3+)∶CsPbCl_(3)钙钛矿纳米晶发光材料。掺杂后的纳米晶具有最佳的形貌和发光性能:PLQY为16.7%、平均粒径约为7.98nm、荧光发射峰蓝移至400nm、半峰全宽仅为10.0nm。同时该纳米晶的环境稳定性也显著提升,在测试环境(温度60℃、湿度60%RH)下存放10天后,其发光强度仍能保持初始荧光发射强度的60%以上。此工作较大程度上改善了CsPbCl_(3)钙钛矿纳米晶存在的问题,对于其实际应用存在重大意义。CsPbCl_(3)all-inorganic perovskite nanocrystals(PNCs)are still limited by weak luminescence,very low photoluminescence quantum yield(PLQY),and instability under long-term exposure to oxygen and moisture.To solve the problem,Er^(3+)∶CsPbCl_(3)PNCs emitting bright blue-violet light were prepared by using the trivalent cation of erbium(Er^(3+))as B-site doping element.The doped nanocrystals have the best morphology and luminescence properties:PLQY is 16.7%,average particle size is about 7.98 nm,fluorescence emission peak blue shifts to 400 nm,full width at half maximum(FWHM)is only 10.0 nm.Meanwhile,the environmental stability of the nanocrystals is also significantly improved.After 10 days of storage in the test environment(temperature of 60℃,humidity of 60%RH),its luminous intensity can still maintain more than 60%of the initial fluorescence emission intensity.The work has improved the existing problems of CsPbCl_(3)PNCs to a great extent,and has great significance for practical application.

关 键 词：钙钛矿纳米晶(PNC) CsPbCl_(3) 光致发光量子产率(PLQY) B位掺杂 稳定性 

分 类 号：TB383[一般工业技术—材料科学与工程]