Investigation on effects of precursor pre-heat treatments on CIGS formation using spin-coated CIG precursor

Madhuri, K. and Kannan, P. K. and Yadav, Brijesh Singh and Chaudhari, Sushmita and Dhage, Sanjay R. and Dey, Suhash Ranjan (2021) Investigation on effects of precursor pre-heat treatments on CIGS formation using spin-coated CIG precursor. Journal of Materials Science: Materials in Electronics, 32 (2). pp. 1521-1527. ISSN 0957-4522

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A low cost, non-vacuum process involving spin coating of metallic precursors followed by selenization was substantiated for the fabrication of CIGS (CuInxGa(1−x)Se2) thin film absorber. Spin coating of CIG precursors using environmentally benign solvents and studying the effects of various heat treatments on the spin-coated CIG precursor film leads to high-quality crystalline CIGS thin films with minimum carbon impurities. In this work, effects of various heat treatments of CIG precursor (heat treatment of precursor films after each individual run of spin coating using hot plate, using air dryer, without any pre-heat treatment and heating of 30-run coated sample on hot plate for 30 mins) followed by selenization has been investigated and being reported. The as-prepared CIGS thin film samples are characterized by X-ray diffraction (XRD), Raman spectroscopy (RS), Field emission scanning electron microscopy (FESEM), UV-Vis-IR spectroscopy and X-ray photo electron spectroscopy. From XRD pattern and Raman spectra, MoSe2 phase is also observed along with tetragonal chalcopyrite CIGS phase. Through FESEM and EDS, it is observed that heating each individual run has resulted a high-quality compact dense film with minimum carbon composition. XPS also confirms the minimum carbon composition in case of preheating individual run. From UV-Vis spectra, the bandgap of the prepared CIGS material is found to be 1.5 eV, essential for the cell fabrication.

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IITH Creators:
IITH CreatorsORCiD
Chaudhari, SushmitaUNSPECIFIED
Dey, Suhash Ranjan
Item Type: Article
Uncontrolled Keywords: Cell fabrications; Environmentally benign; Field emission scanning electron microscopy; Metallic precursor; Nonvacuum process; Pre-heat treatment; Thin-film absorbers; Uv-vis-ir spectroscopies Carbon; Carbon films; Coatings; Copper compounds; Field emission microscopes; Film preparation; Heat treatment; Nanocrystalline materials; Photoelectron spectroscopy; Scanning electron microscopy; Selenium compounds; Spin coating; X ray diffraction
Subjects: Physics
Materials Engineering > Materials engineering
Materials Engineering > Nanostructured materials, porous materials
Divisions: Department of Material Science Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 25 Jun 2021 10:47
Last Modified: 11 Mar 2022 06:54
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