Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7129564 | Optics & Laser Technology | 2018 | 6 Pages |
Abstract
A series of novel double perovskite tellurate red-emitting phosphors Sr2MgTeO6:xEu3+ (xâ¯=â¯0.05-0.40) were successfully synthesized by a high-temperature solid-state reaction method. The phase structure, photoluminescence properties and thermal stability of the phosphor were investigated in detail. The phosphor shows dominant emission peak at 614â¯nm belonging to the 5D0â¯ââ¯7F2 electric dipole transition under 465â¯nm excitation. The luminescence intensity keeps increasing with increasing the content of Eu3+ to 25â¯mol%, and the critical transfer distance of Eu3+ was calculated to be 12â¯Ã
. The quenching temperature for Sr2MgTeO6:0.25Eu3+ was estimated to be above 500â¯K. This spectral feature reveals high color purity and excellent chromaticity coordinate characteristics. Therefore, Eu3+-doped Sr2MgTeO6 phosphors are potential red phosphors for blue chip-based white light-emitting diode and display devices.
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Engineering
Electrical and Electronic Engineering
Authors
Jingyun Liang, Shancang Zhao, Xuexia Yuan, Zengmei Li,