Wavelength-selective emitter is a critical component in thermophotovoltaic (TPV) systems. How to evaluate and further enhance TPV efficiency for different PV cells by designing selective emitter is still needed for realistic applications. Hence, the impact of the nanoparticle-based spectrally selective emitter on the TPV efficiency was investigated in this work. The nanoparticle material, radius, volume fraction and thickness of emitter was optimized based on the spectral cut-off efficiency ${\eta }_{\text{s}}$ and effective emittance efficiency ${\eta }_{\text{e}}$ for GaSb and InGaAsSb PV cells respectively. Results showed that W emitter achieved better TPV performance than Ti and Ni emitters. The maximized ${\eta }_{\text{s}}{\eta }_{\text{e}}$ achieved 0.415 and 0.535 for GaSb and InGaAsSb PV cells at 1200 °C, indicating that this nanoparticle-based structure emitter was more suitable for the InGaAsSb PV cell with the low bandgap. These results give valuable insights into design opportunity for the selective emitter in various TPV systems.

波长选择发射器是热光电（TPV）系统中的关键组件。实际应用中仍然需要如何通过设计选择性发射极来评估和进一步提高不同PV电池的TPV效率。因此，在这项工作中研究了基于纳米粒子的光谱选择性发射体对TPV效率的影响。基于光谱截止效率优化了纳米粒子的材料，半径，体积分数和发射体的厚度${\eta }_{\text{s}}$ 和有效的发射效率 ${\eta }_{\text{Ë}}$分别用于GaSb和InGaAsSb PV电池。结果表明，W发射极实现了比Ti和Ni发射极更好的TPV性能。最大化${\eta }_{\text{s}}{\eta }_{\text{Ë}}$GaSb和InGaAsSb PV电池在1200°C时达到0.415和0.535，表明这种基于纳米粒子的结构发射体更适合带隙低的InGaAsSb PV电池。这些结果为各种TPV系统中的选择性发射极的设计机会提供了宝贵的见解。