CIS type thin-film solar cells which use copper (Cu), indium (In), selenium (Se) as a light absorbing layer are thinner than crystalline silicon type solar cells. Under a NEDO contract, the company prepared cells of about 1 cm2from this material, not containing cadmium, and reached 23.235 % energy conversion efficiency. Ongoing work on scaling this technology is considered a great step forward toward reducing the power generation costs of solar cells that combine the high performance and high reliability.
NEDO news release, January 17, 2019
Solar Frontier Co. exceeds 23 % energy conversion efficiency with CIS-based thin-film solar cells