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Color-converted remote phosphor prototype of multiwavelength excitable borosilicate glass for white light-emitting diodes |
Tian Hua (田华)a b c, Liu Ji-Wen (刘技文)a b d, Qiu Kun (仇坤)b c, Song Jun (宋俊)b c, Wang Da-Jian (王达健)b c d |
a School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China; b School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China; c Institute of Materials Physics, Tianjin University of Technology, Tianjin 300384, China; d Tianjin Key Laboratory for Photoelectric Materials & Devices, Tianjin 300384, China |
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Abstract We report a unique red light-emitting Eu-doped borosilicate glass to convert color for warm white light-emitting diodes. This glass can be excited by from 394 nm-peaked near ultraviolet light, 466 nm-peaked blue light, to 534 nm-peaked green light to emit desired red light with an excellent transmission in the wavelength range of 400-700 nm which makes this glass suitable for the color conversion without great cost of luminous power loss. In particular, assembling this glass to commercial white light-emitting diodes, the tested results show that the color rendering index is improved to 84 with a loss of luminous power by 12 percent at average, making this variety of glass promising for inorganic "remote-phosphor" color conversion.
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Received: 07 February 2012
Revised: 05 April 2012
Accepted manuscript online:
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PACS:
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85.60.Jb
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(Light-emitting devices)
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42.15.Eq
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(Optical system design)
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78.55.Qr
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(Amorphous materials; glasses and other disordered solids)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 50872091 and 21076161), the Tianjin Municipal Sci/Tech. Commission, China (Grant Nos. 10SYSYJC28100 and 2006ZD30), and the Tianjin Municipal Higher Education Commission, China (Grant No. 20110304). |
Corresponding Authors:
Liu Ji-Wen, Wang Da-Jian
E-mail: jwliu@tjut.edu.cn; djwang@tjut.edu.cn
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Cite this article:
Tian Hua (田华), Liu Ji-Wen (刘技文), Qiu Kun (仇坤), Song Jun (宋俊), Wang Da-Jian (王达健) Color-converted remote phosphor prototype of multiwavelength excitable borosilicate glass for white light-emitting diodes 2012 Chin. Phys. B 21 098504
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