Laminated solar cell and preparation method thereof

Abstract

The invention relates to the field of a solar battery cell, and specifically discloses a laminated solar cell. The laminated solar cell comprises a top cell unit, a middle layer and a bottom unit layer which are arranged successively. The hole transport layer of the top cell unit is located on the backlight side of a photosensitive layer. The bottom cell unit is a P type silicon cell. According to the laminated solar cell, the P type silicon cell is matched with an inverted perovskite cell, the hole transport layer is located on the backlight side of the photosensitive layer, moreover, an electron transport layer is located at the light incident side of the photosensitive layer, therefore, strong absorption of the hole transport layer to light is avoided, the energy of sunlight entering the photosensitive layer is improved, and the loss of a short circuit current is reduced. Moreover, the PN of the P type silicon cell is relatively close to the light incident side, the absorption of the bottom cell to the light is improved, and the performance of the laminated solar cell is further improved. The integral cost of the laminated solar cell is reduced by use of the P type silicon cell. The invention also discloses a preparation method of the laminated solar cell.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a stacked solar cell and a preparation method thereof. Background technique [0002] The energy distribution of the solar spectrum is broad, and a semiconductor material can only absorb photons with energies higher than its energy gap value. The photons with lower energy in sunlight will pass through the battery and cannot be used; the excess energy of high-energy photons exceeding the energy gap width will be transferred to the lattice atoms of the battery material itself through the energy pyrolysis of photogenerated carriers to make the material itself fever. None of these energies can be transferred to the load through photogenerated carriers and become effective electrical energy. Therefore, the theoretical conversion efficiency of single-junction solar cells is generally low. [0003] As a result, stacked solar cells have emerged, which are generally composed of three parts: a...

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to address the serious problem of short-circuit current loss in

Images