Analysis of Photoelectric Conversion Efficiency of Space Laser Energy Transfer Based on Temperature Rise Effect

Temperature is an important factor affecting the efficiency of laser energy transmission. In this paper, aiming at the application of laser energy transmission in space, the existing spatial laser energy transmission photoelectric conversion model is improved and the mathematical model of photocell temperature rise is established. The model is used to analyze the influence of photoelectric cell temperature change on photoelectric conversion efficiency. The model takes into account various factors such as temperature, photoelectric cell material, space thermal radiation, laser space transmission characteristics, and improves the accuracy of the current model. On this basis, the maximum photoelectric conversion efficiency under different conditions and the corresponding photoelectric cell temperature are calculated. The conclusion shows: when other conditions remain unchanged, the photoelectric conversion efficiency first increases and then decreases with the increase of temperature. In addition, the stability value of the temperature of the photocell is generally different from the corresponding temperature value under the maximum efficiency under different conditions. So it is necessary to adjust the temperature according to the specific situation. It provides a theoretical basis for the practical application and temperature control of laser energy transfer in space.