Tunable dual-emission of Sb3+, Ho3+Co-doped Cs2NaScCl6single crystals for light-emitting diodes

Qingyong Qin; Yu Liu; Ge Gao; Zhaoqiong Chen; Zejiang Gao; Li Chen; Xianci Zhong; Bingsuo Zou

doi:10.1088/1361-6528/ad14b2

Tunable dual-emission of Sb³⁺, Ho³⁺Co-doped Cs₂NaScCl₆single crystals for light-emitting diodes

Nanotechnology. 2023 Dec 29;35(11). doi: 10.1088/1361-6528/ad14b2.

Authors

Qingyong Qin¹, Yu Liu¹, Ge Gao¹, Zhaoqiong Chen¹, Zejiang Gao¹, Li Chen¹, Xianci Zhong², Bingsuo Zou^{1

3}

Affiliations

¹ School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China.
² School of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, People's Republic of China.
³ School of Resources, Environments and Materials, Guangxi University, Nanning 530004, People's Republic of China.

PMID: 38086072
DOI: 10.1088/1361-6528/ad14b2

Abstract

Lead-free halide double perovskites are considered as one of the most promising materials in optoelectronic devices, such as solar cells, photodetectors, and light-emitting diodes (LEDs), due to their environmental friendliness and chemical stability. However, the extremely low photoluminescence quantum yield (PLQY) of self-trapped excitons (STEs) emission from lead-free halide double perovskites impedes their applications. Herein, Sb³⁺ions were doped into rare-earth-based double perovskite Cs₂NaScCl₆single crystals (SCs), resulting in a large enhancement of PLQY from 12.57% to 87.37%. Moreover, by co-doping Sb³⁺and Ho³⁺into Cs₂NaScCl₆SCs, the emission color can be tuned from blue to red, due to an efficient energy transfer from STEs to Ho³⁺ions. Finally, the synthesized sample was used in multicolor LED, which exhibited excellent stability and optical properties. This work not only provides a new strategy for improving the optical properties of Cs₂NaScCl₆SCs, but also suggests its potential application in multicolor LEDs.

Keywords: energy transfer; light-emitting diodes; photoluminescence quantum yield; rare-earth-based double perovskite; self-trapped excitons.