Chemically deposited CdS by an ammonia-free process for solar cells window layers

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2009.11.001· OSTI ID:21285651

Ochoa-Landin, R ^[1]; Sastre-Hernandez, J; Vigil-Galan, O ^[2]; Ramirez-Bon, R ^[1]

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1. Centro de Investigacion y Estudios Avanzados del IPN, Unidad Queretaro, Apdo. Postal 1-798, 76001 Queretaro, Qro. (Mexico)
2. Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional UP Adolfo Lopez Mateos, Edif. 9, 07738 Mexico, DF (Mexico)

Chemically deposited CdS window layers were studied on two different transparent conductive substrates, namely indium tin oxide (ITO) and fluorine doped tin oxide (FTO), to determine the influence of their properties on CdS/CdTe solar cells performance. Three types of CdS films obtained from different chemical bath deposition (CBD) processes were studied. The three CBD processes employed sodium citrate as the complexing agent in partial or full substitution of ammonia. The CdS films were studied by X-ray diffraction, optical transmission spectroscopy and atomic force microscopy. CdS/CdTe devices were completed by depositing 3 {mu}m thick CdTe absorbent layers by means of the close-spaced vapor transport technique (CSVT). Evaporated Cu-Au was used as the back contact in all the solar cells. Dark and under illumination J-V characteristic and quantum efficiency measurements were done on the CdS/CdTe devices to determine their conversion efficiency and spectral response. The efficiency of the cells depended on the window layer and on the transparent contact with values between 5.7% and 8.7%. (author)

• OSTI ID: 21285651
• Journal Information: Solar Energy, Vol. 84, Issue 2; Other Information: Elsevier Ltd. All rights reserved; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
CADMIUM SULFIDES
CADMIUM TELLURIDE SOLAR CELLS
WINDOWS
QUANTUM EFFICIENCY
TIN OXIDES
LAYERS
FLUORINE
INDIUM OXIDES
DOPED MATERIALS
SODIUM COMPOUNDS
CITRATES
FILMS
CHELATING AGENTS
SPECTRAL RESPONSE
CONVERSION
CHEMICAL VAPOR DEPOSITION
PERFORMANCE
SUBSTRATES
TRANSMISSION
ELECTRIC CONDUCTIVITY