▎ 摘　　要

NOVELTY - Light trapping structure of titanium dioxide nanotubes modified by gold nanoparticle prepared by (i) evaporating layer of titanium on the surface of the graphene layer on the window layer of the gallium arsenide/graphene Schottky junction solar cell, (ii) anodizing at constant potential in a two-electrode electrochemical cell with platinum foil as cathode and gallium arsenide substrate as anode, growing titanium dioxide nanotube array structures in ammonium fluoride glycerol solution or ethylene glycol solution, and (iii) immersing gallium arsenide/graphene Schottky junction solar cell with the titanium dioxide nanotube array structure in the step (ii) in a tetrachloroauric(III) acid trihydrate solution, and irradiating with a xenon lamp as a light source, where gold(III) cation is reduced to gold nanoparticles on the titanium dioxide nanotube array structure, and vacuum drying, is claimed. USE - The structure is used in aerospace field. ADVANTAGE - The structure: improves the utilization rate of light source and photoelectric conversion efficiency of the device; and enhances the light absorption efficiency of the device through the surface plasmon effect. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: 1 gold nanoparticle-modified titanium dioxide nanotube light-trapping structure gallium arsenide Schottky junction solar cell; and 2 preparing the light trapping structure of titanium dioxide nanotubes modified by gold nanoparticle.