DocumentCode :
3620333
Title :
Light absorption in nanostructured crystalline ZnO thin films
Author :
M. Danila;L. Licea;M. Purica
Author_Institution :
National Inst. for Res. & Dev. in Microtechnologies (IMT), Bucharest, Romania
Volume :
1
fYear :
2005
fDate :
6/27/1905 12:00:00 AM
Firstpage :
77
Abstract :
This work is presenting some experimental results on transmissivity and absorption coefficient versus wavelength in visible and near-infrared ranges for transparent and conductive ZnO nanocrystalline thin films with thickness of 0.1 - 0.2 /spl mu/m and grain sizes of 15-20 nm. The absorption coefficient which is the measurable quantity differs in the nanocrystalline thin films as compared to that of the bulk sample, in exchange the energy band-gap which is the determinable microscopic quantity remains unchanged, its variation being connected only to the nanocrystalline structure and size lattice symmetry and particle size, up to 3-5 nm. An elementary model is considered to explain the experimental results on light absorption in ZnO nanocrystalline thin films with grain size D/sub hkl/ in the range of 15-20 nm. The proposed model applies to polycrystalline thin films 0.1-0.2 /spl mu/m with grain size larger than 5 to 7 nm.
Keywords :
"Crystallization","Zinc oxide","Transistors","Grain size","Electromagnetic wave absorption","Conductive films","Energy measurement","Particle measurements","Size measurement","Wavelength measurement"
Publisher :
ieee
Conference_Titel :
Semiconductor Conference, 2005. CAS 2005 Proceedings. 2005 International
Print_ISBN :
0-7803-9214-0
Type :
conf
DOI :
10.1109/SMICND.2005.1558714
Filename :
1558714
Link To Document :
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