Improving the thermal conversion efficiency of thermal photovoltaic system to optimize the design of thermal emitter in thermophotovoltaic has attracted worldwide attention in recent years due to the world’s major power have devoted great efforts to the exploration of outer space. Based on this background, the focus of this study is to adjust the emission spectrum of the thermal emitter to improve the thermoelectric conversion efficiency of the thermal photovoltaic system. Aiming at the problems of emission spectrum and material characteristics, the model of TMM transfer matrix is established, and the problems of solving thermal radiation emission and calculating emission spectrum in Maxwell equation are solved. Use appendix website: https://refractiveindex.info/, the transmittance of 50 nm thick tungsten at the wavelength of 0.3 ~ 5 μ m is obtained to draw the emission spectrum of tungsten. According to the wavelength analysis of tungsten in the people's Republic of China, it is verified to be within a reasonable range. Aiming at the problems of spectrum and material characteristics of composite structures, a TMM transmission matrix model is established. The coherent light reflection and transmission of multilayer material structure are expressed as the product of matrix. The relationship equation between the properties of multilayer material and its emission spectrum is obtained, and the problem of emission spectrum is solved.

Guangyuran Liao. Research on Optimal Design of Thermal Emitter Based on Thermal Photovoltaic Technology. Academic Journal of Engineering and Technology Science (2022) Vol. 5, Issue 6: 42-48. https://doi.org/10.25236/AJETS.2022.050608.

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