title: A long persistent phosphor based on recombination centers originating from Zn imperfections.
abstract: The recombination luminescence from Zn imperfections has been extensively investigated; however, there have been few reports on the long persistent luminescence of Zn imperfections as emitting centers. Here, we observed a long persistent luminescence in blue-white visible region from 6 ZnO:3 GeO2:Al2O3 phosphor with Zn imperfections as emitting centers. Persistent luminescence could be observed beyond 2h with naked eyes. The properties of traps were also elaborated by the measurements of thermo-luminescence spectra and photo-stimulated luminescence decay curves. Furthermore, a long persistent phosphor with warm white color was developed by doping Cr(3+) into 6 ZnO:3 GeO2:Al2O3 phosphor.
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Du
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China.
authors.forename: Kaniyarakkal
authors.initials: K
authors.lastname: Sharafudeen
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China.
authors.forename: Chenxing
authors.initials: C
authors.lastname: Liao
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China. Electronic address: qjr@scut.edu.cn.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
mesh_terms: D000536:Aluminum Hydroxide / Q000737:chemistry*; D000537:Aluminum Oxide / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D005857:Germanium; C040516:germanium oxide; D000536:Aluminum Hydroxide; C069471:aluminum oxide hydroxide; D015032:Zinc; D000537:Aluminum Oxide; D015034:Zinc Oxide
keywords: Long persistent luminescence; Recombination luminescence; Zn imperfections