Novel semi?transparent solar cell based on ultrathin multiple Si/Ge quantum wells

Unlike conventional opaque solar cells, semi-transparent cells enable simultaneous electricity generation and light transmission. Along with energy harvesting, the offered multiple functionalities of these technologies, such as aesthetic appearance, visual comfort thermal management, open diverse integration opportunities into versatile technological applications. In this work, first demonstration a novel cell based on ultrathin hydrogenated amorphous Si/Ge quantum wells (MQW) is reported. Through optoelectronic modelling, advantages MQW photoactive material to overcome intrinsic limitations thin (20 nm) (2.5 single well (SQW) counterparts are explained. This allows extra degree freedom for both optical design bandgap engineering. Mainly, multiplication QWs number in periodic configuration, taking advantage effective synergy between electronic photonic confinements, leads an improvement photocurrent, while preserving high voltage fill factor ensuring significant transparency. The new concept yields boost power conversion efficiency up 3.4% considerable average visible transmission about 33%. A utilization above 1.1% achieved, which can be considered one highest among inorganic technologies. successful indicates promising potential emerging photovoltaic technology supplying systems relevant applications buildings, vehicles greenhouses.