Vacuum-semiconductor solid-state two-stage thermionic power generation device

Abstract

The invention provides a vacuum-semiconductor solid-state two-stage thermionic power generation device. The vacuum-semiconductor solid-state two-stage thermionic power generation device comprises a light gathering module, a high-temperature thermionic power generation module, a low-temperature thermionic power generation module and a heat dissipation module; the light gathering module gathers and absorbs heat energy from sunlight; the high-temperature thermionic power generation module is a vacuum thermionic power generation module and converts heat energy from the absorber into electric energy; and the low-temperature thermionic power generation module is a semiconductor solid-state thermionic power generation module based on a Van der Waals heterojunction, and waste heat which cannot be utilized by the high-temperature thermionic power generation module is converted into electric energy. According to the two-stage thermionic device, a high-low-temperature two-stage energy recovery design method is adopted, gradient utilization of energy is achieved, and high overall photoelectric conversion efficiency is achieved.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization and semiconductor solid-state thermo-electric conversion, in particular to a solid-state two-stage thermionic power generation device. Background technique [0002] Solar energy is an important renewable energy, which plays a pivotal role in my country's energy strategy. The main methods of solar power generation are mainly divided into two types, namely photothermal power generation and photovoltaic power generation. The former is to use solar energy to heat the working fluid, convert light energy into heat energy of the working fluid, and drive steam turbines, Stirling and other machinery to do work; the latter uses sunlight to irradiate p-n nodes in photovoltaic materials to generate photogenerated carriers , the photogenerated carriers can be collected to drive the load of the external circuit. In addition, the thermal ion generator can also be applied to photovoltaic power ...

AI Technical Summary

Problems solved by technology

High-efficiency thermionic power generation devices require electrode materials with low work function and high melting point. However, it is difficult for current electrode materials to achieve these two indicators at the same time, which also limits the wide application of thermionic power generation devices.

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