Film solar cell

Abstract

The invention discloses a design concept of a film solar cell (8) with a wave guide structure, which is applied to the field of new energy. The film solar cell consists of a metal film (1), heavy sheet glass (2), a transparent conductive film (3), a photoelectric active film (4) and a metal film (5), The film solar cell can directly couple a sunlight (7) into a waver guide layer between the two metal layers to generate an ultrahigh-order guide mode (7) with ultrahigh light intensity which is unrelated to polarization or incident angle, and the photoelectric active film (4) is always enclosed and permeated by a high-concentration and wide-band optical field, thus the photoelectric transformation efficiency of the cell can be effectively improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a thin-film solar cell with a waveguide structure used in the new energy field. Background technique [0002] Among all solar cells, silicon-based solar cells have the highest conversion rate and the most mature technology, and are currently the most important photovoltaic materials, occupying a dominant position in large-scale applications and industrial production. But silicon-based solar photovoltaic cells also face a major contradiction between efficiency and cost. First of all, since silicon-based solar cells need to consume more high-quality silicon materials, the corresponding cell preparation process is relatively complicated, making the price high, and it is very difficult to greatly reduce its cost; secondly, the photoelectric conversion efficiency of the cell is nearly ten There were few major breakthroughs in the middle of the year. The key to solving this contradiction is to improve...

AI Technical Summary

Problems solved by technology

There are many ways to reduce the cost of solar cells, among which reducing the thickness of the photoelectric active film is the most direct and simple method, but at the same time it is at the expense of reducing the conversion efficiency

Studies have shown that reducing the thickness of the active film to less than 0.7 microns will affect the open circuit voltage and short circuit current of the solar cell, thereby affecting the performance of the solar cell

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