摘要
无机铅卤钙钛矿CsPbX_(3)(X=Cl,Br,I)由于具有荧光量子产率高、带隙可调、吸光系数高等优点,在发光器件和光伏器件领域有着广阔的应用前景。但由于重金属铅具有毒性,会对环境及生物造成危害,所以开发无铅钙钛矿及其衍生材料成为研究热点。而在众多材料中,钙钛矿衍生材料——金属卤化物具有种类多、结构类型多、发光性能优等优点。因此本文利用油酸还原法制备了钙钛矿衍生材料Cs_(3)MnBr_(5),该方法具有环境友好、能耗低、产物纯度高、可大批量生产等优点。Cs_(3)MnBr_(5)材料在近紫外激发下显示了明亮的绿色发光,峰值位于528 nm,半高宽43 nm,色坐标为(0.25,0.69),色纯度高达92%,荧光量子产率为64.69%,在LED照明领域和显示领域具有商业应用潜力。
Inorganic lead halide perovskite has broad application prospects in light-emitting devices and photovoltaic devices due to its advantages,such as high fluorescence quantum yield,adjustable band gap,and high absorption coefficient.Due to the toxic lead ions which is harmful to the environ⁃ment and organisms,the development of lead-free perovskite materials and their derived materials has become a research hotspot.Among many materials,compared with perovskite materials,perovskite-derived materials-metal halides have the advantages of many types,many structural types,and excellent luminescent properties.In this paper,the perovskite-derived material Cs_(3)Mn⁃Br_(5)was prepared by the oleic acid reduction method,which has the advantages of environmental friendliness,low energy consumption,high product purity,and mass production.The Cs_(3)MnBr_(5)ma⁃terial shows bright green luminescence under near-ultraviolet excitation,the emission peak locates at 528 nm,the full width at half maximum is 43 nm,the color coordinates are(0.25,0.69),PLQY is 64.96%and the color purity is as high as 92%.These indicate that Cs_(3)MnBr_(5)material has potential applications in commercial LED lighting and displays.
作者
陈一凡
李江涛
余启辉
陈禹丞
蒋越宁
李旭
王凤和
CHEN Yi-fan;LI Jiang-tao;YU Qi-hui;CHEN Yu-cheng;JIANG Yue-ning;LI Xu;WANG Feng-he(College of Physics Science&Technology,Hebei University,Baoding 071002,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2022年第8期1198-1206,共9页
Chinese Journal of Luminescence
基金
国家自然科学基金(51802069)
中央引导地方项目(216Z104G)
河北大学人才引进项目(521000981236)
河北大学实验室开放项目(sy202036,sy202038)资助。
