title: Effect of surface modification on photoluminescence properties of Y3Al5O12:Ce3+, Gd3+ nano-phosphors.
abstract: In this study, a series of Y(3)Al(5)O(12):Ce(3+), Gd(3+) nano-phosphors were prepared using a simply wet chemical process with polyvinyl pyrrolidone as a modifier. The crystal and bonding structures of Y(3)Al(5)O(12):Ce(3+), Gd(3+) nano-phosphors prepared with different weight percentages of polyvinyl pyrrolidone were characterized by X-ray diffractometry and infrared spectrometry. The decomposition process of dried precursor gel with adding 1.37 wt% polyvinyl pyrrolidone was investigated by differential thermal and thermogravimetric analysis. The effect of surface modification on photoluminescence properties for the samples was studied. The results show that the steric hindrance effect of polyvinyl pyrrolidone leads to high dispersion and good crystallinity of Y(3)Al(5)O(12):Ce(3+), Gd(3+) nano-phosphors prepared with adding a proper weight percentages of polyvinyl pyrrolidone. Adding polyvinyl pyrrolidone is beneficial for the photoluminescence enhancement of the samples, which is attributed to the promotion of the incorporation of Ce(3+) and Gd(3+) into the Y(3)Al(5)O(12) nanocrystal and the surface passivation of the nano-particles by the polyvinyl pyrrolidone molecules.
authors.affiliation: Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.forename: Junfu
authors.initials: J
authors.lastname: Zhao
authors.forename: Hefeng
authors.initials: H
authors.lastname: Zhou
authors.forename: Jian
authors.initials: J
authors.lastname: Liang
authors.forename: Xuguang
authors.initials: X
authors.lastname: Liu
authors.forename: Bingshe
authors.initials: B
authors.lastname: Xu
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D002563:Cerium / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D015019:Yttrium / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; C503779:yttrium-aluminum-garnet; D002563:Cerium; D015019:Yttrium; D005682:Gadolinium; D000535:Aluminum