https://scholars.lib.ntu.edu.tw/handle/123456789/626250
標題: | Disorder–Order Conversion-Induced Enhancement of Thermal Stability of Pyroxene Near-Infrared Phosphors for Light-Emitting Diodes | 作者: | Wen D Liu H Guo Y Zeng Q Wu M RU-SHI LIU |
關鍵字: | Cr3+; Near-Infrared Light; Ordering/Disordering; Structural Rigidity; Thermal Quenching | 公開日期: | 2022 | 來源出版物: | Angewandte Chemie - International Edition | 摘要: | The minimization of thermal quenching, which leads to luminescence loss at high temperatures, is one of the most important issues for near-infrared phosphors. In the present work, we investigated the properties of near-infrared Ca(Sc,Mg)(Al, Si)O6 : Cr3+ phosphors with a pyroxene-type structure under blue light excitation. The CaScAlSiO6 : Cr3+ end member of Ca(Sc,Mg)(Al,Si)O6 : Cr3+ phosphor led to broadband emission at a full-width half maximum of 215 nm, whereas the CaMgSi2O6 : Cr3+ end member exhibited high thermal stability at 150 °C, with an intensity of 88.4 % of that at room temperature. The structural analysis and density functional theory calculations revealed the absence of soft conformations and local space confinement contributed to the high structural rigidity and weakened the thermal quenching effect. © 2022 Wiley-VCH GmbH. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129902173&doi=10.1002%2fanie.202204411&partnerID=40&md5=23ddc8688fb5b1e4cdf5ef42407c5760 https://scholars.lib.ntu.edu.tw/handle/123456789/626250 |
ISSN: | 14337851 | DOI: | 10.1002/anie.202204411 | SDG/關鍵字: | Density functional theory; Infrared devices; Light; Light emission; Light emitting diodes; Quenching; Rigidity; Silicate minerals; Thermodynamic stability; Cr 3+; Disorder-order; Endmembers; Lightemitting diode; Minimisation; Near infrared light; Near-infrared phosphors; Ordering/disordering; Structural rigidity; Thermal quenching; Phosphors |
顯示於: | 化學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。