Device for thin film overlying photovoltaic and quick thermal treatment method

Abstract

The invention discloses a device for thin film overlying photovoltaic and quick thermal treatment method so disposed that the method comprises a transparent substrate including a surface region. A first electrode layer overlies the surface region. A copper layer is formed overlying the first electrode layer and indium layer is formed overlying the copper layer to form a multi-layered structure. The multi-layered structure is subjected to a thermal treatment process in an environment containing a sulfur bearing species to form a bulk copper indium disulfide. the quick thermal treatment employing a gradient ranging between 1 degree centigrade per second to about 50 degrees centigrade per second. In specific embodiment, the resistivity of the first transparent electrode layer is kept of about 10 ohm / cm2 or less, and the light transmission rate is more than 80 percent.

Description

technical field [0001] The present invention generally relates to photovoltaic materials and methods of manufacture. More specifically, the present invention provides a method and structure for fabricating high efficiency thin film photovoltaic cells. By way of example only, the present methods and materials include absorber materials composed of copper indium disulfide, copper tin sulfide, iron disulfide, or other substances for single junction cells or multi-junction cells. Background technique [0002] From the beginning, human beings have been faced with the challenge of finding ways to use energy. Energy exists in forms such as petrochemical, hydroelectric, nuclear, wind, biomass, solar and more primitive forms such as wood and coal. Over the past century, modern civilization has relied on fossil energy as a vital source of energy. Petrochemical energy includes natural gas and oil. Natural gas includes lighter forms such as butane and propane, which are commonly use...

AI Technical Summary

Problems solved by technology

However, crystalline materials are usually expensive and difficult to manufacture on a large scale

Furthermore, devices made from such crystalline materials often have low technology to form thin films of photosensitive materials used to convert electromagnetic radiation into electricity

Similar limitations exist for the use of thin-film technology in the manufacture of solar cells, i.e., the efficiency is generally poor

In addition, the reliability of the membrane is generally poor, and it cannot be used for a long time in ordinary environmental applications

Often thin films are difficult to mechanically integrate with each other

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