单光谱高能流辐射下热光伏电池转换性能分析

Based on the structural composition and working principle of thermophotovoltaic cells, establish a two-dimensional finite element model for the surface current flow of a single thermophotovoltaic cell. To verify the reliability of the model, a single spectral high-energy flux radiation testing platform was built to test and verify the thermoelectric conversion performance under actual radiation conditions. The results show that when the size of the incident light spot remains constant, as the incident radiation energy increases, the output power of the thermophotovoltaic cell increases. The impact of the incident radiation energy on the short-circuit current increases linearly with the incident radiation energy, about 1.25 times, but the impact on the open-circuit voltage is very small, about 1.02 times. When the incident energy is constant and the size of the diameter changes, the short-circuit current also increases with the increase of the spot, but the circuit voltage remains unchanged, and the output power of the cell increases. The working area of the cell should be increased as much as possible to improve the performance.