Mitsubishi attains 14.8% conversion efficiency in thin-film silicon solar cell

Mitsubishi Electric has revealed that it has achieved a high photoelectric conversion efficiency of

The thin-film silicon PV cell developed by Mitsubishi Electric has a triple junction structure that utilizes a majority of the solar spectrum for higher efficiency. Photoelectric conversion efficiency is the rate at which sunlight energy is converted into electric current, with higher rates meaning more output.

At present, crystalline silicon is used commonly for PV cells. Due to their relatively high photoelectric conversion efficiency, crystalline silicon PV modules are used in applications with limited surfaces, such as on the roofs of residential houses.

Mitsubishi Electric has made a technological breakthrough to achieve 14.8% photoelectric conversion efficiency, according to its own evaluation, by using a triple-junction configuration in which the first layer absorbs short wavelengths and the third layer absorbs long wavelengths, enabling the use of a wide solar spectrum from visible light to infrared rays.

The company intends to continue its research and development with aims to raise the photoelectric conversion efficiency of its thin-film PV cells by improving cell structure, materials, processing and other factors, and aiming to develop advanced PV systems that contributes to sustainable, low-carbon societies.