https://scholars.lib.ntu.edu.tw/handle/123456789/629619
Title: | Highly Luminescent Earth-Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K | Authors: | 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 KEN-TSUNG WONG Lin, Hao-Wu |
Keywords: | coordination environments; electron-phonon coupling; light-emitting diodes; manganese(II) halide crystals; zero thermal quenching emission | Issue Date: | Feb-2023 | Publisher: | WILEY-V C H VERLAG GMBH | Journal Volume: | 19 | Journal Issue: | 8 | Source: | Small | 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. |
Description: | 2205981 |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/629619 | ISSN: | 1613-6810 | DOI: | 10.1002/smll.202205981 |
Appears in Collections: | 化學系 |
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