Eu3+, Tb3+ doping induced tunable luminescence of Cs2AgInCl6 double perovskite nanocrystals and its mechanism

被引:28
作者
Cui, Endian [1 ]
Yuan, Xiangyang [1 ]
Tang, Luomeng [1 ]
Yang, Lu [1 ]
Yang, Xiaoyan [1 ]
Liao, Xiaoling [1 ]
Tang, Jianfeng [1 ]
Zhao, Yanan [3 ]
Sun, Wei [4 ]
Liu, Kai [5 ]
Liu, Yingshuai [1 ]
Liu, Jing [1 ,2 ]
机构
[1] Southwest Univ, Sch Mat & Energy, Key Lab Luminescence Anal & Mol Sensing, Minist Educ, Chongqing 400715, Peoples R China
[2] Southern Med Univ, Affiliated Hosp 3, Orthoped Hosp Guangdong Prov, Ctr Orthopaed Surg,Dept Joint Surg, Guangzhou, Guangdong, Peoples R China
[3] Southwest Univ, Analyt & Testing Ctr, Chongqing 400715, Peoples R China
[4] Hainan Normal Univ, Coll Chem & Chem Engn, Key Lab Laser Technol & Optoelect Funct Mat Hainan, Haikou 571158, Peoples R China
[5] Chongqing Jiaotong Univ, Coll Mat Sci & Engn, Chongqing 400074, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Cs-2; AgInCl6; Lanthanide doping; Energy transfer; Tunable luminescence; Defect formation energy; HALIDE DOUBLE PEROVSKITE; UP-CONVERSION NANOCRYSTALS; LEAD; LANTHANIDE; TRANSITIONS; DESIGN;
D O I
10.1016/j.apsusc.2022.155472
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Incorporation of lanthanide ions (Ln3+) can remarkably enhance the structural stability and optical properties of lead-free perovskite NCs. Herein, we have established the relationship between the intrinsic emission of Cs2A-gInCl6 host and the Ln3+ by Eu3+, Tb3+ doping in Cs2AgInCl6 NCs, realizing tunable luminescence of NCs in the visible region. Experimental studies and density functional theory (DFT) calculations analysis show that Eu3+ and Tb3+ occupy the sites of In3+ in Cs2AgInCl6, the defect formation energy for Cs2AgInCl6:Ln3+ is larger than the pristine Cs2AgInCl6, resulting in a more stable cubic double perovskite structure. The optical band gap in-creases with the increase in Ln3+ doping percentage. Turning excitation from 250 nm to 300 nm, the broad self -trapped excitons (STEs) emission is more remarkable, and the narrow Ln3+ emission is less notable. The emitted color can be adjusted from white to red and to green light by altering the doping concentration of Eu3+ or Tb3+ and excitation wavelength. This work promotes the design and optoelectronic application of desired lead-free perovskites.
引用
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页数:9
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