Flexible cadmium telluride thin-film solar cell structure

Abstract

A flexible cadmium telluride thin film solar cell structure is provided, belonging to the field of the novel energy source. In order to reduce the cost of the cadmium telluride solar cell, expand the application range of the cell, the flexible cadmium telluride cell will be one the development direction in future. One of the problems in the flexible cadmium telluride cell is how to solve the ohmic contact of the metal back electrode with the cadmium telluride thin film, namely finding a material adding to the space between the metal electrode and the cadmium telluride thin film, which is favorable for the transmission of the p carrier. The invention adopts the graphite olefin as the transition layer of the cadmium telluride layer and the metal electrode layer, makes full use of the characteristics of high transmission speed of the graphite olefin carrier, good mechanical properties. The kish is performed with the chemical cleaning, and the polyimide film with the glue is used to peel off the graphite, to cause layer of graphite olefin sticked on the surface of the polyimide. On the above basis, the cadmium telluride is splashed and deposited, and CdCl2 anneals under the protection of inert gas, and the cadmium sulphide and ITO thin film are splashed and deposited. The prepared flexible cadmium telluride thin film solar cell is provided with the advantages of light weight and low cost.

Description

1. Technical field [0001] The field of the invention is new energy. 2. Background technology [0002] Energy is the foundation of human society. The development of society will consume a large amount of fossil energy, and its consumption rate will increase exponentially. The sustainable development of human society requires sustainable energy supply. The clean energy currently produced is far from meeting the needs of industrial production and people's daily life. On the one hand, the fossil energy that modern society can survive and use in large quantities is a non-renewable resource that will be exhausted in the near future; on the other hand, the exploitation of traditional fossil energy has caused irreversible damage to the environment and emitted a large amount of greenhouse effect Gas and sulfur dioxide and other gases that pollute the environment. Vigorously developing environmentally friendly renewable energy has become an inevitable choice to ensure the sustaina...

AI Technical Summary

Problems solved by technology

Crystalline silicon solar cells have the following disadvantages: (1) The smelting and purification of silicon materials adopt high energy-consuming processes, so the cost reduction space of silicon solar cell components is limited; (2) Crystalline silicon solar cells can only be made into rigid substrate components , the mass specific power is less than 100 W / kg, which cannot fully meet the needs of building integration and portable power supply

Conventional cheap metals such as silver and nickel have low work functions, and direct use of cadmium telluride thin films will form a Schottky junction. The self-built electric field of this junction is opposite to the direction of the built-in electric field of the cadmium telluride / cadmium sulfide main junction. It hinders the movement of holes from the main junction to the back electrode, thus greatly reducing the conversion efficiency of the device