title: The effects of charge compensation on photoluminescence properties of a new green-emitting ZnB2O4:Tb3+ phosphor.
abstract: Charge compensation is an effective way to eliminate charge defects and improve the luminescent intensity of phosphors. In this paper, a new green-emitting phosphor ZnB(2)O(4):Tb(3+) was prepared by solid-state reaction at 750 °C. The effects of Tb(3+) doping content and charge compensators (Li(+), Na(+) or K(+)) on photoluminescence properties of ZnB(2)O(4):Tb(3+) were investigated. X-ray powder diffraction analysis confirms the sample has cubic structure of ZnB(2)O(4). The excitation and emission spectra indicate that this phosphor can be excited by near ultraviolet light at 378 nm, and exhibits bright green emission with the highest peak at 544 nm corresponding to the (5)D4 → (7)F5 transition of Tb(3+). The critical quenching concentration of Tb(3+) in ZnB(2)O(4) host is 8 mol%. The results of charge compensation show that the emission intensity can be improved by Na(+) and K(+). Specifically, K(+) is the optimal one for ZnB(2)O(4):Tb(3+).
authors.affiliation: State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Zhan-Chao
authors.initials: ZC
authors.lastname: Wu
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.forename: Yong-Mei
authors.initials: YM
authors.lastname: Mei
authors.forename: Man
authors.initials: M
authors.lastname: Jiang
authors.forename: Shao-Ping
authors.initials: SP
authors.lastname: Kuang
mesh_terms: D008027:Light; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013725:Terbium / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D017967:Zinc Compounds; D013725:Terbium
keywords: charge compensation; green-emitting phosphor; photoluminescence