Highly Efficient Lead-Free (Bi,Ce)-Codoped Cs2Ag0.4Na0.6InCl6 Double Perovskites for White Light-Emitting Diodes

Wang, Chun-Yun2; Liang, Pei1; Xie, Rong-Jun4; Yao, Yue2; Liu, Ping2; Yang, Yatao3; Hu, Jie3; Shao, Liyang3; Sun, Xiao Wei3; Kang, Feiyu2; Wei, Guodan2

2020-09-22

10.1021/acs.chemmater.0c02463

CHEMISTRY OF MATERIALS   影响因子和分区

0897-4756

1520-5002

Lead-free double perovskite phosphors are promising alternatives to lead halide perovskites for wide uses in optoelectronic applications, but suffer from a low quantum efficiency. Here, we propose to enhance the quantum efficiency of orange-emitting Cs2Ag0.4Na0.6InCl6:Bi via a codoping strategy. The internal quantum efficiency of Cs2Ag0.4Na0.6InCl6:1% Bi phosphor was increased from 89.9% to the record 98.4 and 98.6% by codoping with 1% Ni and 1% Ce, respectively. High-level density functional theory calculations have revealed that the enhanced efficiency is ascribed to the formation of shallow trap states by codoping with Ce, while codoping with Mn can create delocalized deep traps that decrease the quantum efficiency. By applying the (Bi, Ce)-codoped sample together with a blue BaMgAl10O17:Eu2+ phosphor, a white light-emitting diode with an excellent color rendering index of 95.7 and a correlated color temperature of 4430 K has been demonstrated. The developed Cs2Ag0.4Na0.6InCl6:Bi,Ce phosphor shows a great potential as down-conversion luminescent material in solid-state lighting for general illumination.

SCI ; EI

英语

其他

New Energy Technology Engineering Laboratory[SDRC [2016]172] ; National Natural Science Foundation of China[51832005]

Chemistry ; Materials Science

Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:000575419000024

AMER CHEMICAL SOC

20204309390286

Lead compounds ; Perovskite ; Quantum theory ; Density functional theory ; Light emitting diodes ; Quantum efficiency ; Light emission

Minerals:482.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

MATERIALS SCIENCE

Web of Science

1.China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China
2.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Tsinghua Berkeley Shenzhen Inst TBSI, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Coll Mat, Xiamen 361005, Peoples R China

Wang, Chun-Yun,Liang, Pei,Xie, Rong-Jun,et al. Highly Efficient Lead-Free (Bi,Ce)-Codoped Cs2Ag0.4Na0.6InCl6 Double Perovskites for White Light-Emitting Diodes[J]. CHEMISTRY OF MATERIALS,2020,32(18):7814-7821.

Wang, Chun-Yun.,Liang, Pei.,Xie, Rong-Jun.,Yao, Yue.,Liu, Ping.,...&Wei, Guodan.(2020).Highly Efficient Lead-Free (Bi,Ce)-Codoped Cs2Ag0.4Na0.6InCl6 Double Perovskites for White Light-Emitting Diodes.CHEMISTRY OF MATERIALS,32(18),7814-7821.

Wang, Chun-Yun,et al."Highly Efficient Lead-Free (Bi,Ce)-Codoped Cs2Ag0.4Na0.6InCl6 Double Perovskites for White Light-Emitting Diodes".CHEMISTRY OF MATERIALS 32.18(2020):7814-7821.