title: Luminescence properties, crystal structure and LED package of potential blue-emitting phosphors--Ca2BN2F:Eu2+.
abstract: A blue-emitting phosphor - Ca2BN2F:Eu2+ was synthesized by a solid state reaction. Ca2BN2F crystallizes in the orthorhombic system with space group Pnma (No. 62) and Z = 4. The Ca2BN2F:Eu2+ exhibites broad emission and excitation bands corresponding to the allowed f→d electronic transition of Eu2+. Concentration quenching of Eu2+ emission was observed for 1 mol% due to the energy transfer between Eu2+ ions via electric multipolar interaction with the critical transfer distance of about 25.11 Å. In addition, the thermal stability and applications of blue-emitting Ca2BN2F:Eu2+ phosphors in n-UV LED have been firstly discussed in this study. The preliminary data demonstrate that the novel blue-emitting phosphor exhibits the potential to be an n-UV convertible phosphor.
authors.affiliation: Material and Chemical Research Laboratories, ITRI, Hsinchu 300, Taiwan.
authors.forename: Yi-Chen
authors.initials: YC
authors.lastname: Chiu
authors.forename: Wei-Ren
authors.initials: WR
authors.lastname: Liu
authors.forename: Chien-Hao
authors.initials: CH
authors.lastname: Huang
authors.forename: Yao-Tsung
authors.initials: YT
authors.lastname: Yeh
authors.forename: Shyue-Ming
authors.initials: SM
authors.lastname: Jang
mesh_terms: D001896:Boron Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D003116:Color; D003460:Crystallization / Q000379:methods; D003461:Crystallography; D004581:Electronics / Q000295:instrumentation; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry*; D005461:Fluorine / Q000737:chemistry*; D008029:Lighting / Q000295:instrumentation / Q000379:methods; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry; D008420:Manufactured Materials; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation / Q000379:methods*; D014466:Ultraviolet Rays
chemical_list: D001896:Boron Compounds; D017610:Calcium Compounds; D049408:Luminescent Agents; D005461:Fluorine; C017282:boron nitride; D005063:Europium