NDLI: Optical Characteristics of Strontium Titanate Films Formed by Sol-Gel Method on Quartz Substrates

Content Provider	Springer Nature Link
Author	Kulak, A. I. Sohrabi Anaraki, H. Gaponenko, N. V. Khoroshko, L. S. Kholov, P. A. Raichyok, T. F.
Copyright Year	2017
Abstract	The transmission spectra of films of strontium titanate up to 200 nm thick produced on quartz glass substrates by the sol-gel method were investigated in the region of 200–1100 nm. The sol was prepared from strontium acetate, titanium tetraisopropoxide, acetic acid, and ethylene glycol monomethyl ether. The strontium titanate films were formed by successive deposition of five layers with intermediate drying of each layer and final heat treatment at temperatures in the range of 500–700$^{o}$C. From analysis of the transmission spectra it was established that the obtained films are characterized by a wide forbidden band decreasing from 4.46 to 3.84 eV in the transition from x-ray amorphous films to crystalline films with refractive index of 1.996 (λ = 620 nm) due to the high packing density of up to 81.5% of that for monocrystalline strontium titanate.
Starting Page	132
Ending Page	135
Page Count	4
File Format	PDF
ISSN	00219037
Journal	Journal of Applied Spectroscopy
Volume Number	84
Issue Number	1
e-ISSN	15738647
Language	English
Publisher	Springer US
Publisher Date	2017-04-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	sol-gel method strontium titanate optical transmission spectra refractive index band gap energy Atomic/Molecular Structure and Spectra Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Condensed Matter Physics

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