A robust red-emitting phosphor-in-glass (PiG) for use in white lighting sources pumped by blue laser diodes

A red-emitting phosphor-in-glass (PiG) material was synthesized by dispersing CaAlSiN3:Eu2+ phosphor powders in a ZnO-B2O3-BaO-Al2O3 glass matrix. A fully densified translucent CaAlSiN3:Eu2+ PiG material was achieved at 650 °C for 40 min with an external quantum efficiency (QE) of 43%, transmittance...

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Published inJournal of alloys and compounds Vol. 702; pp. 193 - 198
Main Authors Zhu, Qiang-Qiang, Xu, Xin, Wang, Le, Tian, Zi-Feng, Xu, Yan-Zheng, Hirosaki, Naoto, Xie, Rong-Jun
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 25.04.2017
Elsevier BV
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Summary:A red-emitting phosphor-in-glass (PiG) material was synthesized by dispersing CaAlSiN3:Eu2+ phosphor powders in a ZnO-B2O3-BaO-Al2O3 glass matrix. A fully densified translucent CaAlSiN3:Eu2+ PiG material was achieved at 650 °C for 40 min with an external quantum efficiency (QE) of 43%, transmittance of 30% at 640 nm and thermal conductivity of 1.12 Wm−1K−1. The CaAlSiN3:Eu2+ particles were distributed in the glass matrix uniformly, and no serious interfacial reactions occurred between the glass matrix and the contained phosphor particles. Under the excitation of blue laser, the maximum luminous flux of CaAlSiN3:Eu2+ PiG sample is 39 lm at the laser flux density of 0.5 W/mm2. Although luminous saturation was observed at high laser incident density, the PiG material would be a promising red color converter for use in white lighting sources pumped by blue laser diodes. Red-emitting phosphor-in-glass (PiG) material, where CaAlSiN3:Eu2+ phosphor powders are uniformly distributed in a ZnO-B2O3-BaO-Al2O3 glass matrix, as a promising red color converter for laser lighting and display technologies. [Display omitted] •CaAlSiN3:Eu2+ PiG is prepared and discussed for laser lighting technology.•Optical properties of achieved PiG under the blue laser irradiation are clarified.•PiG shows suitability as a red color converter in low incident laser power range.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.01.256