本文以尋找適合週期奈米結構做為熱光電放射器，使其在 波段之間具有高放射率且在 的波段有低放射率來優化熱光電系統的發電效率。研究方法以自行撰寫之程式(基於嚴格耦合波理論)模擬二維週期奈米結構之放射率，並且與其他已發表之文獻中類似的研究對照，證實程式可以重現他人的結果。運用嚴格耦合波理論搭配田口方法做系統性的參數探索，找出一組熱光電放射器的幾何形狀(x¬= 400 nm、y= 400 nm、fx= 0.8、fy= 0.8、d= 200 nm、凸結構)，由模擬不同入射及極化方向之放射率頻譜得知此結構比已知的凹結構更為適合做為熱光電放射器。

n this study, a promising method to enhance the efficiency is to employ nanoscale surface periodic structures (gratings) as a wavelength-selective Thermophotovoltaic (TPV) emitter tailoring radiation spectrum. We require that its emissivity is close to 1 when incident wavelength is between and close to 0 when incident wavelength is at . This work is going to numerically develop optimized two-dimensional nanoscale gratings as TPV emitters. Their fitting radiative properties will be demonstrated with directional-spectral emittance and acquired from programmed codes based on Rigorous Coupled-Wave Analysis (RCWA) and be compared with other’s to prove our numerical method to work on 2D gratings. We use the Taguchi Methods to optimize the emitter with RCWA, and find out a better structure for emitters(x¬= 400 nm、y= 400 nm、fx= 0.8、fy= 0.8、d= 200 nm、protruding structure). The emissivity spectrum of various incident angle and polarization can be simulated to show that this specific structure is referred to as a better emitter than that currently being used.

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