Surface morphology and optical studies of non-aqueous Bi2S3 thin films

Authors
Mane, R. S.Desai, J. D.Joo, Oh-ShimHan, Sung-Hwan
Issue Date
2007-02
Publisher
ESG
Citation
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, v.2, no.2, pp.141 - 148
Abstract
A high purity, amorphous Bi2S3 thin film composed of loosely packed nanometer-sized spherical grains has been successfully deposited onto ITO substrate at room temperature from non-aqueous bismuth nitrate and sodium thiosulphate solution using a simple, inexpensive, reproducible, and environmentally friendly chemical route method. Film was characterized for structural, surface morphological, optical properties by means of X-ray diffraction ( XRD), scanning electron microscopy ( SEM) and UV-vis spectrometer, respectively. In last section, Bi2S3 film on ITO substrate was utilized in photo-electrochemical ( PEC) solar cell as a working and platinum as a reference electrode in presence of 80 mW/ cm(2) light intensity in lithium iodide as an electrolyte. Film of non-aqueous Bi2S3 exhibits two separate direct band transitions. Existence of two separate direct transitions was firstly noted in Bi2S3 thin films and explained its possible causes. PEC analysis confirms n-type conductivity.
Keywords
CHEMICALLY DEPOSITED BI2S3; BATH DEPOSITION; CHEMICALLY DEPOSITED BI2S3; BATH DEPOSITION; chemically modified electrode; glutamic acid; hydroquinone; catechol; electrochemical determination
ISSN
1452-3981
URI
https://pubs.kist.re.kr/handle/201004/134705
Appears in Collections:
KIST Article > 2007
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