Blue luminescence from ZnGa2O4: Effect of lattice distortion and particle size

被引：32
作者：
Kamal, Chirauri Satya [1 ,2 ]
Boddu, Sanyasinaidu [3 ]
Vishwanadh, B. [4 ]
Rao, K. Ramachandra [1 ]
Sudarsan, V. [3 ]
Vatsa, R. K. [3 ]
机构：
[1] Govt Coll A, Crystal Growth & Nanosci Res Ctr, Rajahmundry 533105, Andhra Prades, India
[2] Adikavi Nannaya Univ, Dept Phys, Rajahmundry 533296, Andhra Prades, India
[3] Bhabha Atom Res Ctr, Chem Div, Bombay 400085, Maharashtra, India
[4] Bhabha Atom Res Ctr, Mat Sci Div, Bombay 400085, Maharashtra, India
来源：
JOURNAL OF LUMINESCENCE | 2017年 / 188卷
关键词：
ZnGa2O4; Synthesis; Photo luminescence; Lifetime; XRD; TEM; PHOTOLUMINESCENCE PROPERTIES; N-LINES; PHOSPHOR; EMISSION; SPECTRA; MN2+;
D O I：
10.1016/j.jlumin.2017.04.056
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Dependence of structural and luminescence properties of nano-crystalline ZnGa2O4 phosphors on the synthesis conditions such as concentration of precursor metal ions and nature of solvents were investigated in detail. Based on XRD and luminescence studies carried out on samples prepared with high and low concentrations of precursor metal ions in ethylene glycol medium, it is established that distortion of structural units along with defects/traps in the lattice, and not the particle size, is responsible for the observed blue shift in emission maxima with decrease in precursor concentrations. Unlike this, a red shift is observed when the synthesis is carried out under identical conditions in water medium. This has been explained based on difference in particle size distributions as confirmed by TEM studies.
引用
收藏
页码：429 / 435
页数：7
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