標題: Ca2PO4Cl : Eu2+: an intense near-ultraviolet converting blue phosphor for white light-emitting diodes
作者: Chiu, Yi-Chen
Liu, Wei-Ren
Chang, Chun-Kuei
Liao, Cheng-Chun
Yeh, Yao-Tsung
Jang, Shyue-Ming
Chen, Teng-Ming
應用化學系
Department of Applied Chemistry
公開日期: 1-Jan-2010
摘要: A blue phosphor Ca2PO4Cl : Eu2+ was synthesized by solid state reaction and evaluated as a candidate for white LEDs. The luminescent intensity of Ca2PO4Cl : Eu2+ was found to be 128% under excitation at 380 nm, 149% under 400 nm, and 247% under 420 nm, as high as that of BaMgAl10O17 : Eu2+. Furthermore, Ca2PO4Cl : Eu2+ reveals high quantum efficiency and excellent thermal stability. By utilizing a mixture of blue-emitting Ca2PO4Cl : Eu2+, green-emitting (Ba, Sr)(2)SiO4 : Eu2+ and redemitting CaAlSiN3 : Eu2+ as light converters, an intense white GaN-based n-UV-LED (400 nm) was fabricated to exhibit an excellent color-rendering index R-a of 93.4 at a correlated color temperature of 4590 K. Based on the results, we are currently evaluating the potential application of Ca2PO4Cl : Eu2+ as a blue-emitting near-UV convertible phosphor.
URI: http://dx.doi.org/10.1039/b920610h
http://hdl.handle.net/11536/149894
ISSN: 0959-9428
DOI: 10.1039/b920610h
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 20
起始頁: 1755
結束頁: 1758
Appears in Collections:Articles