Cu₂O/TiO₂heterojunction Solar Cells With TiO₂Nanorod Arrays Encapsulated In Cu₂O Film

With the rapid development of the global economy, Shortage of energy and increase in demand, Global invest in renewable energy such as wind, hydro, tidal energy, nuclear energy and solar cell to solve the energy crisis and environmental。Where solar cell is inexhaustible, inexhaustible; and very safe, low cost, and free from environmental constraints, solar energy is directly converted into heat and electricity for the benefit of all mankind and has the most potential energy in the21st century. a large number of basic experiments to improve the photoelectric conversion efficiency of solar cells.Cu2O/TiO2heterojunction solar cells consisting of n-type TiO2nanorod arrays encapsulated in the p-type Cu2O thin film were demonstrated by using hydrothermal reaction and electrodeposition technology. The effects of precursor concentration, temperature, deposition potential, length of TiO2nanorods and thickness of Cu2O thin film on the optical and electrical properties of the heteroj unction were studied in detail. Experimental results show that under the irradiation of AM1.5G simulated sunlight with an intensity of100mw/cm2, the optimized photoelectric conversion efficiency is0.63%with the short-circuit current density of2.43mA/cm2, the open circuit voltage of0.68V, and the fill factor of0.66, while the corresponding thickness of Cu2O film is500nm and the length of TiO2nanorods is800nm.In our experiments, we have carried out a series of spinel structure of Cu2O/TiO2heteroj unction. The thesis discusses the structure, composition, optical and electrical properties. More retails are listed as follow:(1) Cu2O/TiO2heterojunction were carried out by hydrothermal method. and electrodeposition technology(2) We studied in TiO2content changes of TiO2-Cu2O heteroj unction impact study. Including:precursor reactant titanium acid concentration and four ding fat and TiO2length influential role. We have two groups of the experimental data shows that the concentration of the fat acid four ding the best value to0.08ml, with four titanate ding increasing concentration of fat, nanometer TiO2bar array the dense, optical and photoelectric conversion efficiency reduced. And on the other hand, titanium dioxide nanotubes of great length is about800nm. The conditions have larger the optical and photoelectric effect. And along with the nano TiO2great length increase reduced.(3) The preliminary study ZnO-Cu2O heterojunction photoelectric chemical properties. TiO2, for comparison, ZnO with for n type semiconductor, however in photoelectric chemical performance in difference, the optical is1.64mA/cm2photoelectric conversion efficiency may reach0.45%.