Flexible Encapsulation and Module of Thin-Film GaInP/GaAs/InGaAs Solar Cells

Lightweight and flexible III-V solar cells create new opportunities for application in satellites, drones, and wearable devices. In this article, a module manufacturing scheme based on resistance welding and lamination technology is proposed to meet the demands of practical application. A combined laminate structure of ethylene-tetrafluoroethylene plus ethylene octene copolymer and polyimide is used to encapsulate flexible III-V solar cells. In laboratory measurements with a spectrum close to AM1.5G, the photoelectric conversion efficiency of the flexible solar cell is 34.4% with an open-circuit voltage of 3.04 V, and the efficiency of the flexible module is 32.7% with a weight density of 469 g m(-2) . The electroluminescence measurements show good performance of the flexible solar cell module, which is expected to achieve large-size flexible III-V solar cells encapsulation.