Photo-thermoelectric coupling system and application

The invention discloses a photo-thermoelectric coupling system and application. The photo-thermoelectric coupling system comprises a heat storage module and a thermoelectric module which are coupled with each other. The heat storage module is used for storing or releasing solar energy; the thermoelectric module performs thermoelectric power generation by using heat energy released by the heat storage module; the heat storage module comprises a photo-thermal material and a stable phase change energy storage material capable of being triggered; the stable phase change energy storage material is dispersed in the photo-thermal material; the photo-thermal material is used for heating under an illumination condition to enable the stable phase change energy storage material loaded in the photo-thermal material to undergo solid-liquid phase change so as to store the heat energy; the stable phase change energy storage material is cooled to a phase change point under the condition of no light, and then is triggered by