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Substrates Effects on CdTe Thin Films Using Double Layer Thermal Evaporation

K.M.A. Hussain, M.S.S. Chowdhury


The CdTe thin films are successfully deposited by a thermal evaporation method. In the CdTe/CdS/FTO glass and CdTe/CdS/AZO/FTO glass structures, modified double-layer thermal evaporation technique is applied for the preparation of CdTe thin films. The XRD analysis of CdTe thin films showed that the films are polycrystalline with a cubic structure. The scanning electron microscopy (SEM) image showed the homogeneous and uniform surface structure of the films. High conductivity of the CdTe thin films was observed for varying temperature. The high optical absorption co-efficient about 105/cm and ~1.5 eV direct band gap of the films indicate that the films are useful as an absorber for photovoltaic application in the solar cell. The research work is done to optimize deposition conditions, deposition technique, thickness and substrates of the materials. The achievement of the modified double-layer thermal evaporation method might be helpful to fabricate solar cells. 


Keywords: Double layers, electrical properties, thermal evaporation

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Nelson J. The Physics of Solar Cells. UK: Imperial College Press; 2004.

Khosroabadi S, Keshmiri SH. Design of a high efficiency ultrathin CdS/CdTe solar cell using back surface field and backside distributed Bragg reflector. Opt. Express. 2014; 22 (S3): A921–29p.

Chander S, Dhaka MS. Preparation and physical characterization of CdTe thin films deposited by vacuum evaporation for photovoltaic applications. Adv. Mater. Lett. 2015; 6 (10): 907–12p.

First Solar raises bar for CdTe with 21.5% efficiency record: pv-magazine. [Online] [Accessed: 20-Nov-2015]. Available:

Echendu OK, Dharmadasa IM. Graded-bandgap solar cells using all-electrodeposited ZnS, CdS and CdTe thin-films. Energies. 2015; 8: 4416–35p.

Waleed A, Zhang Q, Tavakoli M M, et al. Performance improvement of solution-processed CdS/CdTe solar cells with a thin compact TiO2 buffer layer. Sci. Bull. 2016; 61 (1): 86–91p.

Deivanayaki S, Jayamurugan P, Mariappan R, et al. Optical and structural characterization of CdTe thin films by chemical bath deposition technique. Chalcogenide Lett. 2010; 7 (3): 159–63p.

Hussain KMA, Syed IM, Zohra FT, et al. Structural, Optical and Surface Properties of CdTe Thin Films on CdS/FTO Glass Substrates. Am. J of Mat. Sci. and App. 2015; 3 (6): 76–80p.

Lovergine N, Prete P, Tapfer L, et al. Hydrogen Transport Vapor Growth and Properties of Thick CdTe Epilayers for RT X-ray Detector Applications. Cryst Res Tech. 2005; 40 (10–11): 1018–22p.

Katlander J, Chr B, Batres-Estrada G, et al. Development of Methods to Use CdTe Detectors in Field Measurements. Jour. of Phys. Conf. Series. 2006; 41: 523–26p.

Chander S, Dhaka MS. Optimization of physical properties of vacuum evaporated CdTe thin films with the application of thermal treatment for solar cells. Mater. Sci. Semicond. Process. 2015; 40: 708–12p.

Dejpasand MT, Dizaji HR, Ehsani MH. Tunable Structural and Optical Properties of Cadmium Telluride (CdTe) thin Films with Substrate Temperature. Procedia Mater. Sci. 2015; 11: 114–18p.

Enriquez JP, Mathews NR, Hernández GP, et al. Influence of the film thickness on structural and optical properties of CdTe thin films electrodeposited on stainless steel substrates. Mater. Chem. Phys. 2013; 142: 432–37p.

Singh S, Kumar R, Sood KN. Structural and electrical studies of thermally evaporated nanostructured CdTe thin films. Thin Solid Films. 2010; 519 (3): 1078–81p.

Powder Diffraction Data File. Joint Committee of Powder Diffraction Standard. International Center for Diffraction Data, USA Card no. 15–0770.

Aliyu MM, Islam MA, Hamzah NR, et al. Sopian K and Amin N, Recent Developments of Flexible CdTe Solar Cells on Metallic Substrates: Issues and Prospects Int. J. Photoenergy. 2012; 2012: 1–10p.

Nowak M. Linear distribution of intensity of radiation reflected from and transmitted through a thin film on a thick substrate. Thin Solid Films. 1995; 266: 258–62p.

Dejpasand MT, Dizaji HR, Ehsani MH. Tunable Structural and Optical Properties of Cadmium Telluride (CdTe) thin Films with Substrate Temperature. Procedia Mater. Sci. 2015; 11: 114–18p.

Khairnar UP, Bhavsar DS, Vaidya RU, et al. Optical properties of thermally evaporated cadmium telluride thin films. Mater. Chem. Phys. 2003; 80: 421–27p.

Mohammed H. Opto-Electronic Properties of CdTe:Zn Thin Films. M.S. thesis. Baghdad, Iraq: College of Education, Ibn Al-Haithem, University of Baghdad; 2008.

Lee JH, Lim DG, Yi JS. Electrical and optical properties of CdTe films prepared by vacuum evaporation with close spacing between source and substrate. Sol. Energy Mater. Sol. Cells. 2003; 75: 235–42p.

Chander S, Dhaka MS. Physical properties of vacuum evaporated CdTe thin films with post-deposition thermal annealing. Phys. E Low-Dimensional Syst. Nanostructures. 2015; 73: 35–9p.


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