Surface Morphology and Optical Studies of Non-aqueous Bi2S3 Thin Films
Titel:
Surface Morphology and Optical Studies of Non-aqueous Bi2S3 Thin Films
Auteur:
R.S. Mane, J.D. Desai, Oh-Shim Joo and Sung-Hwan Han
Verschenen in:
International journal of electrochemical science
Paginering:
Jaargang 2 (2007) nr. 2 pagina's 141-148
Jaar:
2007
Inhoud:
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/cm2 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.
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