title: Synthesis and luminescence properties of blue-emitting phosphor Ca12Al14O32F2:Eu2+for white light-emitting diode.
abstract: A blue-emitting phosphor Ca12Al14O32F2:Eu2+was synthesized using a high-temperature solid-state reaction under a reductive atmosphere. The X-ray diffraction measurements indicate that a pure phase Ca12Al14O32F2:Eu2+can be obtained for low doping concentration of Eu2+. The phosphor has a strong absorption in the range 270-420 nm with a maximum at ~340 nm and blue emission in the range 400-500 nm with chromatic coordination of (0.152, 0.045). The optimal doping concentration is ~0.24. In addition, the luminescence properties of the as-synthesized phosphor were evaluated by comparison with those of Ca12Al14O32Cl2:Eu2+and the commercially available phosphor BaMgAl10O17:Eu2+. The emission intensity of Ca12Al14O32F2:Eu2+was ~72% that of BaMgAl10O17:Eu2+under excitation at λ = 375 nm. The results indicate that Ca12Al14O32F2:Eu2+has potential application as a near-UV-convertible blue phosphor for white light-emitting diodes.
authors.affiliation: Key Laboratory of Rare Earth Optical and Electronic Materials and Devices, Huaihua University, Huaihua, People's Republic of China.
authors.forename: Wanping
authors.initials: W
authors.lastname: Chen
authors.affiliation: Key Laboratory of Rare Earth Optical and Electronic Materials and Devices, Huaihua University, Huaihua, People's Republic of China.
authors.forename: Xinzhu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Rare Earth Optical and Electronic Materials and Devices, Huaihua University, Huaihua, People's Republic of China.
authors.forename: Liping
authors.initials: L
authors.lastname: Wang
mesh_terms: D003116:Color; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D049408:Luminescent Agents; D005063:Europium
keywords: Ca12Al14O32F2; LED; luminescence; phosphor