Device for photovoltaic power generation and method therefor

A method for photovoltaic power generation, wherein a device for photovoltaic power generation used in the method comprises a photovoltaic power generating reactor comprising a light-transmitting surface, a light condenser component and an external electric field system;

• wherein the light condenser component comprises a solar concentrating cone and a reflector for reflecting sunlight onto the solar concentrating cone;
• the solar concentrating cone has a light-concentrating surface facing the light-transmitting surface of the photovoltaic power generating reactor;
• the external electric field system comprises a positive electric field metal plate and a negative electric field metal plate, the positive electric field metal plate is arranged between the photovoltaic power generating reactor and the solar concentrating cone, and the negative electric field metal plate is arranged at the bottom of the photovoltaic power generating reactor;
• the photovoltaic power generating reactor comprises a container with an opening at the top and a light-transmitting cover arranged at the opening, and a photovoltaic conversion material is inlaid on at least one side of inner walls of the container or inlaid on an inner surface of the light transmitting cover close to the container;
• the photoelectric conversion material is a polyhedron strontium titanate composite catalyst;
• the polyhedron strontium titanate composite catalyst is loaded with a Rh metal compound and a Co metal compound as co-catalysts;
• wherein a preparation method for the polyhedron strontium titanate composite catalyst comprises the following steps:
• (1) mixing strontium titanate and strontium halide, and performing heat treatment to obtain a polyhedron strontium titanate catalyst;
• and
• (2) preparing the polyhedron strontium titanate composite catalyst by a stepwise photodeposition method, wherein the stepwise photodeposition method comprises the following specific steps:
• (a) mixing a rhodium source solution and the polyhedron strontium titanate catalyst, and performing irradiation to obtain a first mixture;
• (b) mixing a cobalt source solution and the first mixture, and performing irradiation to obtain a second mixture;
• and
• (c) performing heat treatment on the second mixture to obtain the polyhedron strontium titanate composite catalyst;
• wherein a mass ratio of the strontium titanate to the strontium halide in step (1) is 1:(2-6);
• wherein the method comprises the following steps:
• (I) adding a raw material for photovoltaic power generation to the photovoltaic power generating reactor;
• (II) energizing the external electric field system, whereby electrode plates are in an energized state;
• and
• (III) reflecting sunlight onto the solar concentrating cone by the reflector, concentrating sunlight, and then casting concentrated sunlight to the photovoltaic power generating reactor for photovoltaic power generation;
• wherein the raw material for photovoltaic power generation in step (I) comprises an ionic liquid and a photoelectric conversion material;
• and the photoelectric conversion material has a concentration of 1-2 mg/mL.