Double-sided three-terminal flexible cadmium telluride solar cell

Abstract

The invention is a semiconductor device utilizing the photovoltaic effect to directly convert light energy into electrical energy and belongs to the technical field of structural design and preparation of novel film solar cells. A conventional cadmium telluride solar cell adopts glass as a substrate, which is easily damaged and is not suitable for some special occasions, the short-circuit currentdensity of the cell is close to the limit, a cell assembly has a cell on one side, and the light on the back cannot penetrate through a metal electrode and can not be utilized by the cell. To preparethe solar cells with the higher short-circuit current density, a feasible new structure is to simultaneously prepare the solar cells on both sides of a metal foil, so both sides can absorb and utilizethe sunlight. The device is advantaged in that properties of semiconductor materials are fully considered, the structure of the double-sided three-terminal flexible cadmium telluride solar cell is proposed, the preparation process can be simultaneously completed on the cadmium telluride solar cell on both sides of the metal foil, so the flexible cadmium telluride solar cell with higher short-circuit current density can be quickly prepared.

Description

technical field [0001] The invention belongs to a semiconductor device which utilizes the photovoltaic effect to directly convert light energy into electrical energy, also known as a photovoltaic solar cell or a solar cell, and belongs to the technical field of structural design and preparation of new thin-film solar cells. Background technique [0002] Cadmium telluride thin-film solar cells have made great progress, and the efficiency of small-area cells exceeds 22%. The spectral response in the wavelength range that the battery can absorb and utilize has almost reached the extreme, and the external quantum efficiency has approached or exceeded 90%. Therefore, it is difficult to continue to increase the short-circuit current density of the battery without new materials or technological breakthroughs. [0003] At present, cadmium telluride solar cells are usually prepared on glass substrates, and the preparation of cadmium telluride solar cells on glass substrates has its ...

AI Technical Summary

Problems solved by technology

However, in the actual application process of solar cell modules, not only is there incident sunlight on the front side, but also there is a large amount of incident light on the back side due to scattering and reflection from the ground. This part of light cannot be absorbed and utilized by solar cells, resulting in energy waste.

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