Abstract:In the application of optical wireless energy transfer, the efficiency of energy transfer depends on the electro-optical conversion efficiency of the laser, the space transmission loss, and the photoelectric conversion efficiency of the photovoltaic cell. Among them, the degree of adaptation between the light field amplitude and phase characteristics and the arrangement of photovoltaic cells has a huge impact on the final photoelectric conversion efficiency. In this letter, we compare the photoelectric conversion efficiency of the Bessel beam, Airy beam, and Gaussian beam in laser energy transfer. Meanwhile, an inverse design method is proposed that generates an optical field from the geometry of photovoltaic (PV) cells by Fresnel-Kirchhoff diffraction integral formula. This paper achieves a high degree of adaptation between the light field and the array of photovoltaic cells to achieve the best photoelectric conversion efficiency. Meanwhile，this paper conducts experimental research on the photoelectric conversion efficiency of photovoltaic cells at different distances and different angles.
