A multi-junction solar cell chip

Abstract

The invention discloses a multijunction solar cell chip, including a vertical through hole array; the side wall of each through hole includes an insulating layer, a transparent metal layer and a transparent conductive layer from inside to outside, and the through hole is filled with transparent stuffing, the insulating layer extends from the side wall of the through hole to the upper and lower surface of the cell chip for covering the peripheral areas of the through hole on the upper and lower surface, the transparent metal layer and the transparent conductive layer extend to the upper surface of the cell chip for covering the peripheral area of the through hole on the upper surface, and the upper surface of the transparent stuffing in the through hole sinks towards the internal part of the through hole to form a concave lens. According to the multijunction solar cell chip, through the through hole array, the negative electrodes on the upper surface of the cell chip are introduced to the back, thus saving the electrode area on the front; the insulating layer, the transparent metal layer and the transparent conductive layer, extending to the upper surface, in each through hole are all light-transmittable, so that no electrodes are positioned on the upper surface of the cell chip to shield light.

Description

technical field [0001] The invention relates to a multi-junction solar cell chip, which belongs to the field of semiconductor optoelectronic devices and technologies. Background technique [0002] Solar cell power generation is a clean and renewable energy source and a major source of new energy in the future. It can directly convert sunlight into electrical energy without any pollution. Compared with traditional fossil energy sources, it is a sustainable, Inexhaustible new energy. However, the cost of solar power generation is still much higher than that of traditional fossil energy. On the one hand, it is because of its high production cost. On the other hand, more importantly, its power generation efficiency still needs to be improved. At present, the internal quantum efficiency of solar cells is very high, especially the internal quantum efficiency of III-V compound solar cells can be as high as 85%, but the actual photoelectric conversion efficiency is still not more t...

AI Technical Summary

Problems solved by technology

However, the cost of solar power generation is still much higher than that of traditional fossil energy. On the one hand, it is because of its high production cost. On the other hand, more importantly, its power generation efficiency still needs to be improved.

At present, the internal quantum efficiency of solar cells is very high, especially the internal quantum efficiency of III-V compound solar cells can be as high as 85%, but the actual photoelectric conversion efficiency is still not more than 50%, and it is about 30% after being integrated into the system. The reason is, on the one hand, optical losses such as reflection, scattering, and absorption of sunlight on the surface of the battery and in the optical system, and on the other hand, the power loss caused by the battery's own resistance.

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