Comprehensive optical studies on SnS layers synthesized by chemical bath deposition

Title
Comprehensive optical studies on SnS layers synthesized by chemical bath deposition
Author(s)
박진호게디스리데비바수데바레디전찬욱Ramakrishna Reddy K.T[Ramakrishna Reddy K.T]
Keywords
SULFIDE THIN-FILMS; BAND-STRUCTURE; SOLAR-CELLS; ELECTRODEPOSITION; THICKNESS; SINGLE; CONSTANTS; BEHAVIOR; SPECTRA
Issue Date
201504
Publisher
ELSEVIER SCIENCE BV
Citation
OPTICAL MATERIALS, v.42, pp.468 - 475
Abstract
A simple non-vacuum and cost effective wet chemical technique, chemical bath deposition was used to prepare tin sulphide (SnS) layers on glass substrates. The layers were formed by varying bath temperature in the range, 40-80 degrees C, keeping other deposition parameters as constant. An exhaustive investigation on their optical properties with bath temperature was made using the transmittance and reflectance measurements. The absorption coefficient was evaluated from the optical transmittance data utilizing Lambert's principle and is >10(4) cm(-1) for all the as-prepared layers. The energy band gap of the layers was determined from the differential reflectance spectra that varied from 1.41 eV to 1.30 eV. Consequently, refractive index and extinction coefficient were obtained from Pankov relations and dispersion constants were calculated using Wemple-Didomenico method. In addition, other optical parameters such as the optical conductivity, dielectric constants, dissipation factor, high frequency dielectric constant and relaxation time were also calculated. Finally electrical parameters such as resistivity, carrier mobility and carrier density of as-prepared layers were estimated using optical data. A detailed analysis of the dependence of all above mentioned parameters on bath temperature is reported and discussed for a clean understanding of electronic characteristics of SnS layers. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/32860http://dx.doi.org/10.1016/j.optmat.2015.01.043
ISSN
0925-3467
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공과대학 > 화학공학부 > Articles
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