標題: (Ba,Sr)Y2Si2Al2O2N5:Eu2+: a novel near-ultraviolet converting green phosphor for white light-emitting diodes
作者: Liu, Wei-Ren
Yeh, Chiao-Wen
Huang, Chien-Hao
Lin, Chun Che
Chiu, Yi-Chen
Yeh, Yao-Tsung
Liu, Ru-Shi
Department of Applied Chemistry
公開日期: 1-Jan-2011
摘要: A highly intense green-emitting phosphor BaY2Si2Al2O2N5 : Eu2+ (BYN : Eu2+) peaking at 511 nm was synthesized by a solid state reaction. The structure refinement, luminescence properties of BYN : Eu2+ phosphors as well as their thermal quenching and the fabrication of white-light-emitting diodes (W-LEDs) were firstly investigated. By partially substituting Ba by Sr, namely (Ba, Sr)Y2Si2Al2O2N5 : Eu2+ (BSYN : Eu2+), the emission peak was shifted to 565 nm, giving a yellow-orange color, due to the splitting of the 5d energy level. By utilizing a mixture of blue-emitting BaMgAl10O17 : Eu2+, green-emitting BYN : Eu2+ and red-emitting CaAlSiN3 : Eu2+ phosphors as light converters, an intense white GaN-based n-UV-LED (380 nm) was fabricated to a exhibit good color-rendering index R-a of 84.5 at a correlated color temperature of 5089 K and CIE coordinates of (0.3425, 0.3478). Based on these results, we are currently evaluating the potential application of BYN : Eu2+ as a green-emitting near-UV convertible phosphor.
URI: http://dx.doi.org/10.1039/c0jm03573d
ISSN: 0959-9428
DOI: 10.1039/c0jm03573d
Volume: 21
起始頁: 3740
結束頁: 3744
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