https://scholars.lib.ntu.edu.tw/handle/123456789/575869
標題: | 3d3 system – Comparison of Mn4+ and Cr3+ in different lattices | 作者: | Grinberg M Lesniewski T Mahlik S Liu R.S. RU-SHI LIU |
關鍵字: | Alumina; Aluminum oxide; Fluorine compounds; Temperature distribution; Crystal field modeling; Crystal fields; Electron-lattice interactions; Luminescence lifetime; Red emitting phosphor; Spectroscopic property; Spin orbit interactions; Temperature dependence; Crystal structure | 公開日期: | 2017 | 卷: | 74 | 起(迄)頁: | 93-100 | 來源出版物: | Optical Materials | 摘要: | In the last years the Mn4+ has been successfully used as a dopant in the red-emitting phosphors based on fluoride matrices such as: AMF6 (A=Na, K, Cs, Ba, Rb; M=Si, Ti, Ge), due to its efficient red emission around 630 nm. The peculiarities of the Mn4+ emission are the consequence of the specific energetic structure related to three electrons occupying the 3d orbitals which interact with the crystal field of the lattice. The 3d3 ion system is one of the most extensively investigated systems, specifically concerning the Cr3+, since Al2O3:Cr3+ (ruby) has been used for laser generation. In this contribution the details of energetic structure and kinetics of radiative and nonradiative processes in the 3d3 system are discussed. Special attention is given to consideration of the electron-lattice interaction and spin-orbit coupling. Differences between the spectroscopic properties of Cr3+ and Mn4+ ions in different lattices are analyzed in the framework of the extended crystal field model that includes the vibronic structure of the system. Specifically, we present the proper formula describing the temperature dependence of the Mn4+ luminescence lifetime that includes the interaction with odd-parity phonons. ? 2017 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016626370&doi=10.1016%2fj.optmat.2017.03.057&partnerID=40&md5=0bc5037b72abe00e96565570331716b7 https://scholars.lib.ntu.edu.tw/handle/123456789/575869 |
ISSN: | 9253467 | DOI: | 10.1016/j.optmat.2017.03.057 |
顯示於: | 化學系 |
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