The deposition of a high resistivity transparent (HRT) oxide between a transparent conductive oxide (TCO) and the window CdS has demonstrated the improvement of performance of CdS/CdTe solar cells, fabricated in the superstrate-configuration. In this work the influence of the pneumatic spray pyrolysis (PSP) and magnetron sputtering techniques on the properties TCO/SnO2/CdS structure through the deposition of the intermediate SnO2 between the commercial conducting glass and CdS window is presented by means of X-ray photoelectron spectroscopy (XPS), secondary ion mass spectroscopy (SIMS), and contact resistance, calculated using transmission line method (TLM), in order to reduce the front contact resistance in devices with superstrate-configuration. The results of this work are applicable to other solar cells in the same configuration as the recent solar cells based on the compound Sb2Se3, where the use of this type of HRT has not been studied.
In this work the influence of the deposition of SnO2 buffer layer on the optical, electrical and morphological properties of commercial conducting glasses is presented. Previously the transparent conducting oxide (TCO) were studied in order to determine which is the most appropriate in solar cell applications. The SnO2 thin films were deposited onto glass and commercial conducting glass by pneumatic spray pyrolysis (PSP) and magnetron sputtering techniques and characterized optically and electrically. TCO/buffer bi-layers configuration were processed and characterized through a modified well-known Haccke figure of merit. The results are discussed in terms of considering the usefulness or otherwise of this configuration, depending on the morphological quality of commercial conductive glass in the processing of second-generation solar cells in thin film technology.
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