Nanowire intermediate band solar cell structure based on butterfly-shaped plasmon antenna enhancement

Abstract

The invention discloses a nanowire intermediate band solar cell structure based on a butterfly-shaped plasmon enhancement antenna. A flat oxygen doped zinc telluride / zinc oxide core shell structure nanowire is arranged on a silicon dioxide or quartz substrate. The zinc oxide is arranged on an outer layer. A nanowire length of the oxygen doped zinc telluride / zinc oxide core shell structure is 1-10 micron. A diameter of the core shell structure nanowire is 200-400 nm. A thickness of the zinc oxide is 5-40 nm. Two sides of the core shell structure nanowire are provided with several pairs of metal-aluminum butterfly-shaped antennas. Each pair of the metal-aluminum butterfly-shaped antennas is a tip-to-tip triangular pyramid structure. In each pair of the butterfly-shaped antennas, the two tip-to-tip triangular pyramids can be centrosymmetric relative to the nanowire and can be non-centrosymmetrical. Problems that a state density of an intermediate band of an intermediate band solar cell absorption layer is small and absorption efficiency is low are mainly solved, sunlight full spectrum absorption is enhanced and overall photoelectric conversion efficiency of a device is increased.

Description

technical field [0001] The invention specifically relates to a nanowire solar cell structure and a preparation method thereof, belonging to the technical field of solar cells. Background technique [0002] Solar cells are photoelectric devices that convert solar energy into electrical energy by using the photovoltaic effect of photovoltaic semiconductor materials, and have been widely used in production and life. Existing solar cells are generally made of ultra-pure monocrystalline silicon wafers, and the thickness of this very expensive material is required to be about 200um to absorb as much sunlight as possible, which makes the manufacturing process of silicon-based flat-panel solar cells very difficult. It is complicated, consumes a lot of energy, and costs high. Compared with traditional solar cells, nanowire concentrating solar cells have several advantages: they are more capable of separating and focusing charges, and they can be made of abundant and cheap materials....

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a nanowire mid-band solar cell structure based on a butterfly plasmon enhanced antenna, which solves the problem that the mid-band solar cell has a low density of states in the mid-band and low absorption efficiency. The development of high-efficiency solar cells has laid a solid foundation, and it is expected to realize the development of next-generation solar cells in the direction of high efficiency and low cost

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