柔性III-V太阳电池由于其高效稳定特性在无人机、便携式、可穿戴电子产品的能源供给等诸多领域有着巨大需求。本项目针对柔性多结电池大尺寸制备的高效、稳定性等关键问题，利用分子束外延方法，基于双异质结构的腐蚀阻挡层设计，生长光电流匹配的倒置结构多结电池；将选择性湿法刻蚀技术和传统外延剥离技术结合，实现衬底快速腐蚀和剥离；基于电镀工艺，以柔性金属铜作为背支撑，实现大尺寸柔性电池的稳定制备；发展纳米尺度界面表征方法，研究柔性支撑与电池界面的微观缺陷、界面强度、串联电阻、载流子扩散等对电池效率的影响，实现太阳电池结构的综合设计提高。柔性、高效、稳定的大尺寸的III-V太阳电池的研发必将为未来能源需求提供必要的保障。

The flexible solar cell offers excellent characteristics of high power to weight ratio and flexibility. These characteristics make flexible solar cells strong candidates for implementation in unmanned aerial vehicle, distributed photovoltaic power station and portable solar energy. Due to the high efficiency and high reliability of III-V multi-junction solar cell, developing the fabrication of flexible III-V photovoltaic device has attracted a broad attention around the world. The target of this project is to develop a kind of high efficiency flexible III-V solar cell by the epitaxial Lift-Off technique and thin film transfer. By adjusting the hetero-junction band structure, current-matched solar cell structure is grown by molecular beam epitaxy (MBE) using the approach of inverted metamorphic growth. Hetero-junctions like GaInP/AlInP are ultilized as Etching stop layer. The selective wet etching and epitaxial Lift-Off technique is combined to realize a rapid substrate removal. The thin film solar cell removed from their growth substrate is transferred to a copper handling and support foil by electroplating Cu. We will investigate the influence of device fabrication process on the performance of flexible III-V solar cell by comparing the efficiency of flexible solar cell with substrate based solar cell with the same structure. The investigation of flexible III-V solar cell with high efficiency and reliability will provide a powerful support for the energy demand in special area.