Broadband emission of double perovskite Cs2Na0.4Ag0.6In0.995Bi0.005Cl6:Mn2+ for single-phosphor white-light-emitting diodes

Manchen Hu; Jiajun Luo; Shunran Li; Jing Liu; Jinghui Li; Zhifang Tan; Guangda Niu; Zhenxing Wang; Jiang Tang

doi:10.1364/OL.44.004757

Broadband emission of double perovskite Cs₂Na_0.4Ag_0.6In_0.995Bi_0.005Cl₆:Mn²⁺ for single-phosphor white-light-emitting diodes

Opt Lett. 2019 Oct 1;44(19):4757-4760. doi: 10.1364/OL.44.004757.

Authors

Manchen Hu, Jiajun Luo, Shunran Li, Jing Liu, Jinghui Li, Zhifang Tan, Guangda Niu, Zhenxing Wang, Jiang Tang

PMID: 31568435
DOI: 10.1364/OL.44.004757

Abstract

In this Letter, we report the broadband photoluminescence of lead-free double perovskite Cs₂Na_0.4Ag_0.6In_0.95Bi_0.05Cl₆:Mn²⁺. Under ultraviolet excitation, the white phosphor shows two emission peaks at 550 nm and 610 nm from self-trapped exciton and doped Mn²⁺ ions, respectively, leading to a broad emission spectrum over the whole visible spectrum suitable for lighting application. The white-light-emitting diodes exhibit high light quality with CIE coordinates (0.38, 0.42) and color rendering index of 82.6. The mechanism of luminescence of this double perovskite is also discussed in this Letter.