Multi-junction multi-lamination cadmium telluride thin film solar cell and preparation method thereof

Abstract

The invention discloses a cadmium telluride thin film solar cell of a multi-junction multi-lamination structure, and a preparation method of the cadmium telluride thin film solar cell. The multi-junction multi-lamination structure can be selected from several kinds of materials among different energy gap materials related to cadmium telluride, and form two-junction, three-junction, four-junction, five-junction, six-junction and seven-junction cadmium telluride thin film solar cells with cadmium sulfide. The cadmium telluride thin film solar cell has a wide energy spectrum range, can separate and capture free electrons, is conductive to fully absorbing sunlight, forms high voltage and increases efficiency of the thin film solar cell under the stimulation of sunlight. The multi-junction multi-lamination structure avoids abnormal growth of crystals and formation of holes and cracks, prepares various kinds of compact thin films with even size of crystalline grains and matched energy gaps, and increases the efficiency of the cadmium telluride thin film solar cell.

Description

technical field [0001] The invention relates to a solar cell and a multi-junction multi-stacked thin-film solar cell and a preparation method thereof, in particular to a multi-junction multi-stacked cadmium telluride thin-film solar cell structure and a preparation method thereof. Background technique [0002] Since the French scientist AE. Becquerel discovered the photoelectric conversion phenomenon in 1839, the first solar cell based on semiconductor selenium was born in 1883. Russell obtained the first solar cell patent (US.2,402,662) in 1946, and its photoelectric conversion efficiency was only 1%. It was not until 1954 that Bell Laboratories' research discovered that doped silicon-based materials have high photoelectric conversion efficiency. This research laid the foundation for the modern solar cell industry. In 1958, the Haffman Power Company of the United States installed the first solar panel on a satellite in the United States, and its photoelectric conversion e...

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is to solve the problem of poor matching between single-junction cadmium telluride thin-film solar cells and solar spectrum energy gaps in the prior art, defects generated in the process of grain formation and growth, and how to fully absorb solar energy. Light and improve photoelectric conversion efficiency, a kind of cadmium telluride thin film solar cell with multi-junction and multi-layer structure and its preparation method are proposed

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