β辐伏电池能量转换效率的理论计算

Theoretical Calculation of Energy Conversion Efficiency ofβ-Photovoltaic Battery

通过分析β辐伏电池能量转化各分过程(β射线衰变产生、β射线到达放射源表面、β射线穿过放射源与换能器的间隙、β射线到达换能器表面、β射线在半导体中产生空穴电子对、空穴电子对在内建电场中分离、空穴电子到达电极被收集)效率的影响因素并进行相应理论计算,得到各分效率的理论值,可为提高β辐伏电池的整体效率提供理论支持。得出提高效率的主要途径为:选择合适的材料、合理设计电池结构、优化设计参数及提高制作工艺水平等。

The influencing factors of energy conversion efficiency ofβ-photovoltaic battery during each subprocess(β-ray generation,β-ray reaching the surface of radiation source,β-ray passing through the gap between source and transducer,β-ray reaching transducer surface,β-ray producing hole electron pair in semiconductor,hole electron pair separating in built-in electric field,and hole electron arriving at electrode being collected)were analyzed.The theoretical value of each sub efficiency is obtained by the corresponding theoretical calculation,which can provide theoretical support for improving the overall efficiency ofβ-photovoltaic battery.The conclusion of this paper is that the main ways to improve the efficiency are to select suitable materials,reasonably design the battery structure,optimize the design parameters and improve the production process level.