AM0光谱下三结太阳能电池的温度及聚光特性  

Triple-junction solar cells characteristics under variable temperature and concentration at AM0

作　　者：饶蕾[1] 计春雷[2] 

机构地区：[1]上海电机学院电子工程系,上海200240 [2]上海电机学院计算机科学系,上海200240

出　　处：《浙江大学学报（工学版）》2015年第12期2269-2275,共7页Journal of Zhejiang University：Engineering Science

基　　金：上海市教育委员会科研创新资助项目(14YZ162);上海市高校青年教师培养资助计划(14AZ20)

摘　　要：基于目前广泛使用的单二极管等效电路模型建立三结太阳能电池的仿真模型.以Spectrolab公司的ITJ三结GaInP2/GaInAs/Ge太阳能电池为例,在AM0光谱下,采用黑体辐射理论计算得到各子结电池的短路电流密度,代入该仿真模型计算得到电压-负载电流密度曲线和电压-输出功率曲线.经过对比发现,理论计算结果与Spectrolab公司实验测试得到的ITJ三结太阳能电池的输出性能曲线结果相一致.基于该仿真模型及Spectrolab公司公布的各材料参数值可以计算得到太阳能电池工作在不同温度和聚光条件下的输出特性.从太阳能电池的开路电压来看,随着温度的升高,开路电压下降,而随着聚焦因子的增大,开路电压上升.从太阳能电池的光电转换效率来看,当聚焦因子从1增大到400时,电池转换效率上升,而聚焦因子进一步增大到1 000时,电池转换效率略有下降.结果表明:在温度为28℃、聚光因子为400左右时,ITJ三结太阳能电池在AM0光谱下的光电转换效率达到最大值30.88%.通过该仿真模型可以预测Spectrolab公司的ITJ三结太阳能电池工作在太空中各种环境下的输出性能参数,对空间飞行器的电源系统设计提供可靠数据支持.A simulation model of triple-junction solar cell was established based on the widely used single diode equivalent circuit model. Taking Spectrolab ITJ triple-junction GaInP2/ GaInAs/Ge solar cells as an example, the short circuit current densities of each iunction solar cell were calculated using blackbody radiation theory under AM0 spectrum. The results were imported into the simulation model and the voltage-load current density curve and voltage-output power curve were calculated accordingly. Through comparing, the theoretical results agree well with the experimental results of ITJ triple-junction solar cells output characteristics measured by Spectrolab. The output characteristics of the solar cells working under variable temperature and concentrations can be obtained based on the simulation model and material parameters released by Spectrolab. From the aspect of solar cell open voltage, open voltage decreases as temperature rises, while open voltage rises as concentration increases. From the aspect of solar cell photoelectric efficiency, the efficiency is improved when concentration increases from 1 to 400, howeve the efficiency drops down slightly as concentration factor further increases to 1000. At 28℃, t photoelectric conversion efficiency of ITJ triple-junction solar cells reaches a maximum value of 30.88% with concentration factor equals 400 under AM0 spectrum. The output performance parameters of the Spectrolab ITJ triple-junction solar cells under proposed simulation model, which will provide space vehicle. various environment in space can be predicted thro reliable data supports to the power supply system d the esign of

关 键 词：三结太阳能电池 等效电路模型 黑体辐射 聚焦因子 温度系数 

分 类 号：TM914[电气工程—电力电子与电力传动]