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Keller, David A.
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article
Effect of Mg doping on Cu2O thin films and their behavior on the TiO2/Cu2O heterojunction solar cells
Abstract
<p>The present work shows the effect of magnesium doping on structural, optoelectrical and electrical properties of Cu<sub>2</sub>O thin films prepared by spray pyrolysis. The variation in the concentration of Mg shows significant impact on the final thin film properties, whereas the film doped with 0.5 at% of Mg exhibited major property improvements in comparison with the undoped thin film and among the other concentrations tested. This condition was further applied for the deposition of an absorber layer in a heterojunction solar cell array with a gradient in thicknesses of active layers to investigate the impact of changing thicknesses on the PV parameters of the solar cell. TiO<sub>2</sub> was used as a window layer and the 0.5 at% Cu<sub>2</sub>O doped film as an absorber layer. The produced heterojunction solar cell array was further exposed to a rapid thermal annealing treatment. The I-V measurements show an open circuit voltage of up to 365 mV and a short circuit current density, which is dependent on absorber layer thickness, and reaches to a maximum value of 0.9 mA/cm<sup>2</sup>.</p>