菲涅耳透镜下多结电池表面局部高辐射功率对短路电流的影响  

Influence of Local High Radiation on Short-circuit Current of Multi-junction Solar Cell under Fresnel Lens

作　　者：江景祥 舒碧芬[1] 梁齐兵[1] 黄妍 崔高峻 喻祖康 JIANG Jingxiang;SHU Bifen;LIANG Qibing;HUANG Yan;CUI Gaojun;YU Zukang(Institute for Solar Energy Systems,Sun Yat-sen University,Guangdong Provincial Key Laboratory of Photovoltaic Technology,Guangzhou 510006,CHN)

机构地区：[1]中山大学太阳能系统研究所广东省光伏技术重点实验室,广州510006

出　　处：《半导体光电》2020年第4期494-499,504,共7页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(U1707603);广东省自然科学基金重点项目(2014A030311050)。

摘　　要：为探索以菲涅耳透镜为聚光器的聚光光伏模组中,多结电池中心局部高辐射功率对短路电流的影响,测量菲涅耳透镜的高亮度光斑直径,并据此分别测试室内不同局部光照面积下和户外不同尺寸透镜下的GaInP/GaInAs/Ge三结电池的短路电流,利用电路网络模型分析实验结果。结果表明,短路电流与局部聚光的面积无关;小尺寸菲涅耳透镜聚焦下,沿光轴电流与辐射功率同步变化;透镜尺寸增大到一定程度,电池中心局部承受过高辐射功率,电流受峰值隧穿电流限制,宏观体现为焦平面处短路电流下降。电池放置在焦平面两侧,均可缓解局部高辐射功率,短路电流最高提升8.0%。In order to explore the influence of local high radiation on short-circuit current of multi-junction solar cell in concentrated photovoltaic module with Fresnel lens as the concentrator,the diameters of the high bright spot of Fresnel lens were measured so as to measure the short-circuit current of the GaInP/GaInAs/Ge triple-junction solar cell with different sizes of lens under different local illumination areas.And the experimental results were analyzed by using circuit network model.The results show that the short-circuit current is independent of the area of bright spot,and the current along the optical axis changes synchronously with radiation when the small size Fresnel lens is focused.When the size of lens increases to a certain extent,high radiation presents inthe center of solar cell,and the current is limited by peak tunneling current,which is reflected as the decrease of short-circuit current at the focal plane.Putting the solar cell on both sides of the focal plane canalleviatethe local high radiation,and the short-circuit current can be increased by 8.0%.

关 键 词：聚光光伏模组 菲涅耳透镜 多结电池 局部高辐射功率 短路电流 峰值隧穿电流 

分 类 号：TM615[电气工程—电力系统及自动化]