Spectral analysis of Cu2+:Zn2SiO4, Ni2+:Zn2SiO4 and Co2+:Zn2SiO4 nanocomposites by a sol-gel method

被引：14

作者：

Babu, B. Chandra ^{[1
]}

Buddhudu, S. ^{[1
]}

机构：

[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

来源：

INDIAN JOURNAL OF PHYSICS | 2014年 / 88卷 / 06期

关键词：

Sol-gel glass; Nanocomposites; Optical analysis; OPTICAL-ABSORPTION; PHOTOLUMINESCENCE CHARACTERISTICS; GLASS; NI2+;

D O I：

10.1007/s12648-014-0455-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nanocomposites of host Zn2SiO4 and Cu2+:Zn2SiO4, Ni2+:Zn2SiO4 and Co2+:Zn2SiO4 powders have successfully been synthesised by means of sol-gel method. Their structural and morphological studies have been carried out from the measurement of their X-ray diffraction, field-emission scanning electron microscope and high-resolution transmission electron microscopy. Such studies have revealed their grain sizes in (20-25 nm) exhibiting their structures in willemite. Besides these, optical absorption and luminescence spectra of these nanocomposites have also been investigated. Optical absorption spectra of Cu2+:Zn2SiO4 (blue), Ni2+:Zn2SiO4 (green) and Co2+:Zn2SiO4 (pinkish red) in their xero-gel glasses and from their absorption profiles, crystal field parameter (D (q) ) and energy level characteristic Racah parameters of (B and C) have been computed. For these sol-gel powder materials showing bright colours, their emission profiles have also been measured and these emissions are found to arise due to the occurrence of d-d transitions.

引用

页码：631 / 640

页数：10

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