A new thin-film space PV module technology

ITN Energy Systems has developed a new thin-film space PV module technology based on copper indium gallium diselenide (CIGS) solar cells deposited on flexible 25 /spl mu/m. (1 mil.) stainless steel substrates. The cells are constructed into modules using a welded contact technology that acts as both the electrical and structural interconnection between cells; Thus, the cell string does not require a supporting substrate. Coatings are applied to increase the emissivity and lower the on-orbit operating temperature. An electro-static discharge (ESD) layer is also applied for charge dissipation to mitigate interaction with the space environment. Preliminary thermal cycle test data indicates the technology is robust relative to the space environment.