Highly efficient yellow emission and abnormal thermal quenching in Mn2+-doped Rb4CdCl6

Dayu Huang; Qiuyun Ouyang; Youchao Kong; Bo Wang; Ziyong Cheng; Abdulaziz A Al Kheraif; Hongzhou Lian; Jun Lin

doi:10.1039/d3dt00453h

Highly efficient yellow emission and abnormal thermal quenching in Mn²⁺-doped Rb₄CdCl₆

Dalton Trans. 2023 May 2;52(17):5715-5723. doi: 10.1039/d3dt00453h.

Authors

Dayu Huang^{1

2}, Qiuyun Ouyang², Youchao Kong³, Bo Wang³, Ziyong Cheng¹, Abdulaziz A Al Kheraif⁴, Hongzhou Lian¹, Jun Lin¹

Affiliations

¹ State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. jlin@ciac.ac.cn.
² Key Laboratory of In-Fiber Integrated Optics, Ministry Education of China, and College of Physics and Opotoelectronic Engineering, Harbin Engineering University, Harbin 150001, China.
³ Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, 999078, P. R. China.
⁴ Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia.

PMID: 37021982
DOI: 10.1039/d3dt00453h

Abstract

In this paper, Mn²⁺-doped Rb₄CdCl₆ metal halide single crystals were prepared by a hydrothermal method. The Rb₄CdCl₆:Mn²⁺ metal halide exhibits yellow emission with photoluminescence quantum yields (PLQY) as high as 88%. Due to the thermally induced electron detrapping, Rb₄CdCl₆:Mn²⁺ also displays good anti-thermal quenching (ATQ) behavior with thermal quenching resistance (131% at 220 °C). The increase in the photoionization and the detrapping of the captured electrons from the shallow trap states were appropriately attributed to this exceptional phenomenon based on thermoluminescence (TL) analysis and density functional theory (DFT) calculations. The relationship between the fluorescence intensity ratio (FIR) of the material and temperature change was further explored using the temperature-dependent fluorescence spectrum. It was used as a temperature measuring probe based on absolute sensitivity (S_a) and relative sensitivity (S_b) with the change in temperature. The phosphor-converted white light emitting diodes (pc-WLEDs) were fabricated using a 460 nm blue chip with a yellow phosphor, which has a color rendering index (CRI = 83.5) and a low correlated color temperature (CCT = 3531 K). Because of this, finding new metal halides with ATQ behavior for high-power optoelectronic applications may be made possible by our findings.