Comparative study of optical and structural properties of electrospun 1-dimensional CaYAl3O7:Eu3+ nanofibers and bulk phosphor

被引：24

作者：

Yim, Chul Jin ^{[1
]}

Unithrattil, Sanjith ^{[1
]}

Chung, Woon Jin ^{[2
]}

Im, Won Bin ^{[1
]}

机构：

[1] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

[2] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 330717, Chungnam, South Korea

来源：

MATERIALS CHARACTERIZATION | 2014年 / 95卷

基金：

新加坡国家研究基金会;

关键词：

Electrospinning; MEM analysis; Red phosphor; Nano-phosphor; PHOTOLUMINESCENCE PROPERTIES; CHARGE-DENSITY; LUMINESCENCE; MICROBELTS; EU3+; BAMGAL10O17; NANOTUBES; EMISSION; TM; LN;

D O I：

10.1016/j.matchar.2014.06.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the optical and structural studies of Eu3+-doped 1-dimensional CaYAl3O7 nano-fiber phosphor. CaYAl3O7:Eu3+ phosphors were synthesized by electrospinning technique and the pristine nano-fibers were annealed at 900 degrees C to form well crystallized uniform fibers. Under ultraviolet excitation, the CaYAl3O7:Eu3+ exhibited red emission, due to transitions in the 4f states of Eu3+. In order to explore the difference between the quantum efficiency of nano-fiber and bulk CaYAl3O7:Eu3+ phosphor, detailed structural and optical analyses were carried out. The structural analysis of the CaYAl3O7:Eu3+ nano-fibers indicates that the structural environment surrounding the dopant Eu3+ ion was more unstable in nano-fiber when compared to a bulk sample. Decay curves for both the samples when fitted with double exponential decay model indicate that the nano-fiber has shorter decay time, arising from the larger contribution from the non-radiative decay, due to defect levels introduced in the host lattice. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：27 / 35

页数：9

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