光伏转换-储存一体化电源由于可以同时实现太阳能光电转换和能量储存，可用于轻质、安全稳定和可自充电的便携式电源，已经成为了当前热点前沿课题。本项目采用砷化磷镓薄膜太阳电池和全固态锂离子电池构筑光伏转换-储存一体化电源，并开展提高能量转换-储存效率的基础研究。本项目将优化砷化磷镓电池的结构、改进制备工艺、降低阻抗损失以提高其光伏转换效率；分析、量化并设法降低正偏压对太阳电池效率的影响；采用高容量和高电压正极材料、3D叠层方式来提高锂离子电池的面积能量密度，降低界面阻抗，实现锂离子电池能量储存效率的提高；设计、构筑并优化功能匹配的砷化磷镓与锂离子一体化电源；通过等效电路仿真模拟，阐明光伏充电过程的效率损失机制，最终建立提高一体化电源能量转换-储存效率的基础理论和技术原型。本项目的实施将促进光伏与储能结合学科的创新和发展，对促进我国太阳能利用和便携式电源的发展具有重要意义。

Integrated photovoltaic conversion-storage power has been a frontier research topic，since it allows the solar energy conversion and storage simultaneously, and can be made as a light weight, safe, stable and self-rechargeable portable power. In this project, Gallium Arsenic Phosphide (GaAsP) thin film solar cells are combined to all-solid-state Lithium Ion batteries (LIB) to form integrated flexible powers, and the fundamental research on improving the energy conversion-storage efficiencies will be demonstrated. This project will improve the efficiency of GaAsP solar cell through optimising cell structure, improving fabrication processes, and decreasing resistance losses; analyse, quantify and diminish the adverse effect of the forward bias condition on the efficiency of the working solar cells in the integrated system; it will also increase the areal energy densities of the LIB by using high capacity or high voltage materials as the positive terminals, employing a 3D tandem structure, and decreasing the interfacial impedances between each interface. In addition, this project will design, construct and optimize the integrated power to achieve functional matching between the energy conversion and storage devices. Last, it will reveal the efficiency loss mechanism with the aid of equivalent circuit simulation for the integrated system, and finally establish a series of fundamental theory and technical prototype. The implement of this project will act as a catalyzer to the innovation and development of the photovoltaic-energy storage discipline, and it also has far-reaching meaning on the prosperity of solar energy utilization and portable power field in China.