光伏电池性能对激光无线能量传输系统设计有重要影响。采用940 nm 激光辐照单晶硅光伏电池，研究了光伏电池输出特性随激光强度和电池温度的变化规律。研究结果表明，短路电流随激光功率增加呈现线性增加后饱和的趋势。开路电压和效率与激光功率的关系则呈单峰特性。实验测得光伏电池在293 K 时最大效率为29.49%。在283 K~308 K 范围内，激光功率较低时，短路电流受温度影响较小，基本保持不变。激光功率较大时，短路电流随温度升高而线性下降。开路电压和效率则随温度升高而线性下降，但下降速率随激光强度的变化而变化。同时仿真了光伏电池效率与串联电阻的关系。结果表明，在强激光辐照下，减小串联电阻，降低复合电流的大小是提高单晶硅光伏电池效率的两个重要方面。

Photovoltaic cell performance determined by its parameters is of vital importance for laser wireless power transmission system. The output characteristics of single crystal silicon photovoltaic cell illuminated by diode laser operating at 940 nm are investigated. The relationship between output characteristics and two factors, i.e. laser intensity and temperature, are studied. The results indicate that with the increasing of laser intensity, short-circuit current increases linearly in low intensity levels and then begins to saturate. Both open-circuit voltage and efficiency has a maximum value with increasing laser intensity. The experimental maximum efficiency of photovoltaic cell at 293 K is 29.49%. In the range of 283 K~308 K, short-circuit current is independent of temperature in low intensity levels and decreases linearly in high intensity levels. Open-circuit voltage and efficiency decrease linearly with increasing temperature. However, their temperature coefficients vary with the variation in laser intensity. The relationship between series resistance and efficiency is also simulated. It shows that small series resistance and the reduction of recombination for photovoltaic cell are essential for efficient energy conversion under high intensity laser illumination.