Abstract

Lead-free double perovskite materials with efficient and stable self-trapped exciton (STE) emissions show enormous potential for next-generation solid-state lighting. However, the low-emission efficiency and difficulty of spectral regulation are two major obstacles to their application. Here, all-inorganic rare-earth-based double perovskite Cs₂NaYCl₆ single crystals with strong blue emissions were reported as effective hosts to accommodate lanthanide ion doping. By controlling the introduction of Tb^{3 +} ions and efficient energy transfer from the STEs to the dopants, the emission color of Cs₂NaYCl₆ single crystals was flexibly modulated from blue to green. The quantum yields were also significantly improved from 10% to 78.81% by optimizing the Tb^{3 +} ion concentration. Further, stable light-emitting diode prototypes based on Cs₂NaYCl₆ color conversion materials were fabricated to demonstrate the practical applications of rare-earth-based double perovskite.

© 2022 Optica Publishing Group

Double perovskite microcrystals-based white light-emitting diodes without reabsorption of multiphase phosphors

Gang Yang, Yongsheng Zhu, Xueguo Li, Jinshu Huang, Xiumei Xu, Xiaoxu Ji, Aihua Wang, Jinbing Cheng, and Gencai Pan
Opt. Lett. 46(24) 6043-6046 (2021)

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

Manchen Hu, Jiajun Luo, Shunran Li, Jing Liu, Jinghui Li, Zhifang Tan, Guangda Niu, Zhenxing Wang, and Jiang Tang
Opt. Lett. 44(19) 4757-4760 (2019)

Enhanced photoluminescence of double perovskite Cs₂SnI₆ nanocrystals via Na⁺ doping

Haoming Wei, Tingyu Si, Fan Xu, Wuyang Fan, Tengzhou Yang, Bingqiang Cao, Fangying Juan, Jun Xu, and Yangqing Wu
Opt. Express 31(15) 25298-25306 (2023)

Stable and efficient luminescence of Cs₄PbBr_6−xIx PQDs glass: a potential material for wide color gamut display

Xiaoqing Liu, Yang Lu, Ran Wei, Siyuan Fu, Shiqing Xu, and Junjie Zhang
Opt. Lett. 47(13) 3335-3338 (2022)

Optical temperature sensing by tuning photoluminescence in a wide (visible to near infrared) wavelength range in a Eu³⁺-doped Bi-based relaxor ferroelectric

Arnab De, Anupam Mishra, Dipak Kumar Khatua, Vivek Dwij, Vasant Sathe, Satyam Jena, and Rajeev Ranjan
Opt. Lett. 47(3) 489-492 (2022)