Multi-wavelength excitable europium-doped borosilicate glasses for orange-red emission: composition-induced structure and valence variation

稀土学报(英文版), 2012, 30(5): 408-412. doi: 10.1016/S1002-0721(12)60062-3

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China

2.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China

3.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China

4.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

5.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China;Key Lab of Display Materials & Photoelectronic Devices Ministry of Education, Tianjin 300384, China;Tianjin Key Lab for Photoelecironic Materials & Devices, Tianjin 300384, China

基金项目: Project supported by National Natural Science Foundation of China(50872091;51102265) Key Discipline of Materials Physics and Chemistry (Tianjin,China)(10SYSYJC28100)

Multi-wavelength excitable europium-doped borosilicate glasses for orange-red emission: composition-induced structure and valence variation

QIU Kun ^1, , TIAN Hua ^2, , SONG Jun ^3, , MAO Zhiyong ^4, , WANG Dajian ^5,

1.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China

2.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China

3.School of Materials Science & Engineering. Tianjin University of Technology. Tianjin 300384, China

4.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Keywords： borosilicate glasses

Europium-doped borosilicate glasses were prepared by melt-quenching procedure in the air.The mixed valence of Eu2+ and Eu3+was identified by photoluminescence spectrum and electron paramagnetic resonanoe (EPR).The existence of mixed valence was observed owing to the unequivalent substitution and de-polymerization network of the as-prepared borosilicate glasses.The variation of the glass composition in B2O3/BaO ratios changed the stability of the Eu3+ ions distinctly.In particular,as-prepared borosilicate glasses exhibited a tri-wavelength light excitable spectra centered at 397,466 and 534 nm to give the broadened orange-red emission at around 592 and 617 nm,due to supersensitive transitions of Eu3+ ions.This simultaneous tri-wavelength excitation happened to correspond with the emitting wavelength from near ultraviolet,blue AllnGaN chips and that from YAG:Ce3+.The total quantum yield (QY) of the Eu-doped glasses under 466nm excitation was evaluated to be 10％,potentially providing a versatile combination with the europium-doped borosilicate glasses for red component addition to improve the quality of white light.

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Multi-wavelength excitable europium-doped borosilicate glasses for orange-red emission: composition-induced structure and valence variation

参考文献