The researches of feeding the electrical power of near-space vehicles by the laser energy transmission technology have been explored extensively.To study the performance limit of the laser-radiated photoelectric cells,the relationship of energy gap and laser wavelength was analyzed,the calculation methods of the output parameters were proposed based on the detailed balance theory,and the analytical expressions were derived.The influence rules of the laser wavelengths,power densities,and the cell temperatures on the output performance parameters were achieved by theory calculations.The results show that there exists an optimum laser wavelength to maximize the energy efficiency for photoelectric cells with specific materials.Moreover higher laser power density leads to higher energy efficiency,but not remarkably after it reaches a certain value.Different output feature parameters have different related temperature coefficients for the influences of the cell temperature.