光子学报, 2014, 43 (6): 0625002, 网络出版: 2014-08-18
指数掺杂GaAs阴极光子增强热电子发射型太阳能转换器转化效率理论计算
Conversion Efficiency of Photon Enhanced Thermionic Emission Solar Converters with Exponential Doping GaAs Cathodes
太阳能转化器 指数掺杂 GaAs阴极 转化效率 PETE PETE Solar converter Exponential doping GaAs cathode Conversion efficiency
摘要
光子增强热电子发射型太阳能转换器是一种理论效率极高的新型太阳能利用技术.提出利用指数掺杂GaAs材料作为光子增强热电子发射型太阳能转换器阴极,基于能量守恒及电子扩散漂移发射模型,理论计算了指数掺杂GaAs阴极光子增强热电子发射型太阳能转化器的转化效率.结果表明:指数掺杂GaAs可以显著提高光子增强热电子发射效率;指数掺杂GaAs光子增强热电子太阳能转化器转化效率随聚光倍数的增加和阴极表面电子复合速率减小而单调上升;当太阳基数大于200、阴极表面复合小于104 cm/s时,指数掺杂GaAs阴极光子增强热电子发射型太阳能转换器效率可达30%.
Abstract
Photonenhanced thermionic emission solar energy converter is a new highly efficient solar energy utilization technologies. An exponential doping GaAs material was presented as the cathode of photonenhanced thermionic emission solar converter. The conversion efficiencies of the photonenhanced thermionic emission solar devices with exponential doping GaAs were theoretically analyzed by using the energybalance and diffusiondriftemission models. The results show that exponential doping GaAs prominently enhances photonenhanced thermionic emission conversion, and the efficiency of photonenhanced thermionic emission solar converters with exponential doping GaAs cathodes is a monotonically increasing function of sun concentration and a monotonically decreasing function of cathode surface recombination velocities. The efficiency of the converter can reach 30% at a flux concentration larger than 200 suns and surface recombination velocities maintained at fewer than 104 cm/s.
唐伟东, 杨文正, 杨阳, 孙传东, 蔡志鹏. 指数掺杂GaAs阴极光子增强热电子发射型太阳能转换器转化效率理论计算[J]. 光子学报, 2014, 43(6): 0625002. TANG WeiDong, YANG WenZheng, YANG Yang, SUN ChuanDong, CAI ZhiPeng. Conversion Efficiency of Photon Enhanced Thermionic Emission Solar Converters with Exponential Doping GaAs Cathodes[J]. ACTA PHOTONICA SINICA, 2014, 43(6): 0625002.