Highly Luminescent Earth-Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K
Journal
Small
Journal Volume
19
Journal Issue
8
Date Issued
2023-02
Author(s)
Tan, Guang-Hsun
Chen, Yu-Neng
Chuang, Yung-Tang
Lin, Hao-Cheng
Hsieh, Chung-An
Chen, Yi-Sheng
Lee, Tzu-Yi
Miao, Wen-Chien
Kuo, Hao-Chung
Chen, Li-Yin
Lin, Hao-Wu
Abstract
The phosphor-converted light-emitting diode (PC-LED) has become an indispensable solid-state lighting and display technologies in the modern society. Nevertheless, the use of scarce rare-earth elements and the thermal quenching (TQ) behavior are still two most crucial issues yet to be solved. Here, this work successfully demonstrates a highly efficient and thermally stable green emissive MnI2 (XanPO) crystals showing a notable photoluminescence quantum yield (PLQY) of 94% and a super TQ resistance from 4 to 623 K. This unprecedented superior thermal stability is attributed to the low electron-phonon coupling and the unique rigid crystal structure of MnI2 (XanPO) over the whole temperature range based on the temperature-dependent photoluminescence (PL) and single crystal X-ray diffraction (SCXRD) analyses. Considering these appealing properties, green PC-LEDs with a power efficacy of 102.5 lm W-1 , an external quantum efficiency (EQE) of 22.7% and a peak luminance up to 7750 000 cd m-2 are fabricated by integrating MnI2 (XanPO) with commercial blue LEDs. Moreover, the applicability of MnI2 (XanPO) in both micro-LEDs and organic light-emitting diodes (OLEDs) is also demonstrated. In a nutshell, this study uncovers a candidate of highly luminescent and TQ resistant manganese halide suitable for a variety of emission applications.
Subjects
coordination environments; electron-phonon coupling; light-emitting diodes; manganese(II) halide crystals; zero thermal quenching emission
SDGs
Publisher
WILEY-V C H VERLAG GMBH
Description
2205981
Type
journal article