摘要
柔性高效Ⅲ-Ⅴ族多结太阳电池正在被开发、应用于无人机、可穿戴设备和空间能源等领域.采用MOCVD技术在Ga As衬底上制备太阳电池外延层,之后通过低温键合和外延层剥离方法将外延层转移到柔性衬底上.通过外延层剥离设备设计和大量参数优化实验,实现了GaAs太阳电池结构从四英寸砷化镓晶圆上的有效分离,且不产生缺陷并保持原有的性能.近期,在50μm聚酰亚胺薄膜上制备的30 cm^2大面积柔性GaInP/Ga As/InGaAs三结太阳电池实现了31. 5%的转换效率(AM0光谱),其中开路电压3. 01 V,短路电流密度16. 8 mA/cm^2,填充因子0. 845.由于采用了轻质的聚酰亚胺材料,所得到的柔性太阳电池面密度仅为168. 5 g/m^2,比功率高达2 530 W/kg.
Flexible high-efficiency III-V multijunction solar cells are being developed for use in unmanned Aerial Vehicles(UAVs),wearable devices and space applications.The solar cell epitaxial layers are grown on GaAs substrate by metalorganic chemical vapor deposition(MOCVD)and then are transferred to flexible substrates by cold-bonding and epitaxial lift-off process(ELO).Through the design of ELO apparatus and a large number of experiments on the optimal parameter,GaAs solar cell structure can be effectively separated from 4-inch GaAs wafer without defects and degradation in performance.Recently,30 cm 2 large area flexible GaInP/GaAs/InGaAs 3-junciton solar cells on 50μm polyimide film achieved a 1-sun,AM0 conversion efficiency of 31.5%with an open-circuit-voltage of 3.01 V,a short-circuit current-density of 16.8 mA/cm 2,and a fill factor of 0.845.By using the very light PI substrate,the unit weight of the solar cell is only 168.5 g/m 2 and the specific power is up to 2 530 W/kg.
作者
张梦炎
郭振
孙利杰
陈杰
ZHANG Meng-Yan;GUO Zhen;SUN Li-Jie;CHEN Jie(Department of electronic engineering,Institute of information science and technology,East China Normal University,Shanghai 200241,China;State Key Laboratory of space power technology,Shanghai Institute of Space Power Sources,Shanghai 200245,China;Academy of military science of Chinese PLA,Beijing 100141,China)
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第5期518-522,共5页
Journal of Infrared and Millimeter Waves
基金
Supported by the Shanghai Science and Technology Committee Rising-Star Program(14QB1402800)
关键词
太阳电池
柔性高效
外延层剥离
砷化镓
solar cells
flexible and high-efficiency
epitaxial lift-off
GaAs
