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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%.
Photon-enhanced thermionic emitter solar energy converter is a new type of solar energy utilization technology with extremely high theoretical efficiency. It is proposed that exponential doping of GaAs material be used as the cathode for the photon enhanced thermionic emission solar energy converter. Based on the energy conservation and electron diffusion drift emission model , The conversion efficiencies of exponentially doped GaAs cathode photon-enhanced solar thermal converters were calculated theoretically.The results show that the exponential doping of GaAs can significantly improve the photon-enhanced thermionic emission efficiency; the exponential doping of GaAs photon-enhanced hot electron solar energy converter The conversion efficiency increases monotonously with the increase of the concentration ratio and the decrease of electron recombination rate on the cathode surface. When the solar radiation is greater than 200 and the surface recombination of the cathode is less than 104 cm / s, the exponential doping GaAs cathode photon enhanced thermal electron emission solar energy converter Efficiency up to 30%.