Structural and optical properties of nanocrystalline ZnO powder from sol-gel method

被引：86
|
作者：
Suwanboon, Sumetha [1 ]
机构：
[1] Prince Songkla Univ, Fac Sci, Mat Sci Program, Hat Yai 90112, Songkhla, Thailand
来源：
SCIENCEASIA | 2008年 / 34卷 / 01期
关键词：
zinc oxide; PVP; sol-gel; optical properties; photoluminescence;
D O I：
10.2306/scienceasia1513-1874.2008.34.031
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Nanocrystalline ZnO powders have been synthesized by using zinc acetate dihydrate and polyvinylpyrrolidone (PVP) as starting materials. The calcined powders in air at 600 degrees C for 1 hour have been characterized by X-ray diffraction (XRD), indicating the wurtzite or hexagonal structure with crystallite size of about 45 nm. The transmission electron microscopy (TEM) image gives the grain size of about 100 nm in diameter at 3x10(-4) M PVP The morphology of ZnO powders has been changed from platelet-like to rod shape with increase in PVP concentrations. The calcined ZnO powders exhibited the direct optical band gap of about 3.222-3.237 eV, and its photoluminescence gave the UV emission peak at about 390 nm with small blue shift due to smaller grain size at higher PVP concentrations.
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收藏
页码：31 / 34
页数：4
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