Optical and electrical characterization of CdS-Glycine thin films with ammonia free buffer grown at different temperatures for solar cells applications

D. Berman-Mendoza; D. Quiñones-Urías; S. Ferra-González; A. Vera-Marquina; A. Rojas-Hernández; R. Gómez Fuentes; A. García-Juárez; A. L. Leal-Cruz; A. Ramos-Carrasco

doi:10.1117/12.2026481

18 November 2013 Optical and electrical characterization of CdS-Glycine thin films with ammonia free buffer grown at different temperatures for solar cells applications

D. Berman-Mendoza, D. Quiñones-Urías, S. Ferra-González, A. Vera-Marquina, A. Rojas-Hernández, R. Gómez Fuentes, A. García-Juárez, A. L. Leal-Cruz, A. Ramos-Carrasco

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Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 87858F (2013) https://doi.org/10.1117/12.2026481
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

In this work we report the fabrication and electro-optical characterization of CdS thin films using glycine as complexing agent with ammonia and ammonia free buffer by the Chemical Bath Deposition (CBD) method. The CdS thin films were grown at different temperatures of 50, 60, 70 and 80 °C in a thermal water bath. The morphology of these films was determined using atomic force microscopy; the resultant films were homogeneous, well adhered to the substrate, and specularly reflecting with a varying color depending on the deposition temperature. Transmittance and reflectance measurements of thermally treated CdS films were carried to study the effect of the ammonia buffer on its optical properties and bandgap. The crystallinity of the CdS thin films was determined by means of X Ray diffraction measurements. Therefore, for this study, an ammonia-free complexing agent has been taken for the deposition of CdS. Among different methods, which are being used for the preparation of CdS films, Chemical Bath Deposition (CBD) is the most attractive due to its low cost, easy to handle and large possibilities regarding doping and deposition on various substrates. In particular it can be used to easily obtain field effect devices by depositing CdS thin films over a SiO2/Si substrate. Heterostructures with interesting physical properties can be imagined, realized and tested in this way.. Structures CdS/PbS also were realized and have shown good solar cell characteristics.

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D. Berman-Mendoza, D. Quiñones-Urías, S. Ferra-González, A. Vera-Marquina, A. Rojas-Hernández, R. Gómez Fuentes, A. García-Juárez, A. L. Leal-Cruz, and A. Ramos-Carrasco "Optical and electrical characterization of CdS-Glycine thin films with ammonia free buffer grown at different temperatures for solar cells applications", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 87858F (18 November 2013); https://doi.org/10.1117/12.2026481

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KEYWORDS

Cadmium sulfide

Thin films

Annealing

Solar cells

Transmittance

Atomic force microscopy

Crystals

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