Heterojunction and photoelectrochemistry mixed solar cell

Abstract

The invention discloses a heterojunction and photoelectrochemistry mixed solar cell structure which belongs to the technical field of the applications of solar cells and nano materials. The solar cell structure is characterized in that a transparent electrode layer, a semiconductor nano linear array and an electrolytic solution layer are in pairwise contact; the transparent electrode layer and the semiconductor nano linear array form a heterojunction solar cell; and the transparent electrode layer, the semiconductor nano linear array and the electrolytic solution layer together form a photoelectrochemistry solar cell. The solar energy converting device with the novel structure is formed by mixing the heterojunction solar cell and the photoelectrochemistry solar cell, simultaneously has the characteristics of the two cells and has high photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a heterojunction and photoelectrochemical hybrid solar cell device, belonging to the technical field of solar cells and nanometer material applications. Background technique [0002] Facing the global energy shortage crisis and the deteriorating ecological environment, countries around the world are actively researching, developing and utilizing renewable energy, so as to realize the sustainable development of the energy industry and society. Among them, solar energy has become the focus of renewable energy due to its unique advantages. If 0.1% of the solar energy on the earth's surface is converted into electrical energy, the conversion rate is 5%, and the annual power generation can reach 5.6×10 12 A kilowatt-hour is equivalent to 40 times the current energy consumption in the world. Therefore, solar energy is considered to be the best solution to the energy crisis and the deterioration of the ecological environment. [00...

AI Technical Summary

Problems solved by technology

[0006] The shortcomings of the above two types of solar cell models are: when using a structure with a semiconductor nanowire array layer, if only a heterojunction cell is formed, it is difficult to utilize the space between the semiconductor nanowires, resulting in an insufficient junction area. High, resulting in low battery efficiency; if a traditional photoelectrochemical cell is formed, the electrolyte solution layer between the transparent electrode layer and the nano-semiconductor layer will increase the internal resistance of the battery, resulting in low battery efficiency

The experimental results show that: if no dropwise addition of HBr and Br 2 As the electrolytic solution, only the carbon nanotube film and the silicon nanowire array are in contact, only heterojunction cells can be formed, and the photoelectric conversion efficiency is less than 0.1%; if the solution containing HBr and Br 2 As the electrolytic solution, but without contacting the carbon nanotube film and the silicon nanowire array, only a photoelectrochemical cell can be formed, and the photoelectric conversion efficiency is only 0.7%.

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