| Abstrakt: |
A theoretical study of the photovoltaic parameters of inorganic solar cells based on ZnO/Cu2O and ZnO/CuO heterojunctions is carried out to improve their energy conversion efficiency. The influence of the thickness, charge carrier concentration, and bandgap of Cu2O and CuO films, as well as ZnO, on the photovoltaic parameters of solar cells is studied. The simulation results show that the efficiency of solar cells is significantly affected by the contact potential difference, the diffusion length of minority charge carriers, the amount of generated photocurrent, and the recombination rate. The maximum efficiency of a solar cell based on ZnO/Cu2O equal to 10.63% is obtained, which is achieved with a bandgap, thickness, and charge carrier concentration in Cu2O equal to 1.9 eV, 5 μm, and 1015 cm–3, while the bandgap, thickness, and the concentration of charge carriers in ZnO is equal to 3.4 eV, 20 nm, and 1019 cm–3, and the displacement of the edges of the conduction bands is 0.8 eV. For a solar cell based on ZnO/CuO, the maximum efficiency of 18.27% is obtained with a bandgap, thickness, and charge carrier concentration in CuO equal to 1.4 eV, 3 μm, and 1017 cm–3, as well as a displacement of the conduction band edges of 0.03 eV. The obtained results of modeling solar cells can be used to design and manufacture inexpensive and efficient photovoltaic structures. [ABSTRACT FROM AUTHOR] |
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