Two-dimensional tungsten photonic crystal selective emitter: effects of geometrical parameters and temperature

Rostamnejadi, Ali; Daneshvar, Meysam

doi:10.1007/s00340-018-6910-4

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…Compared with the FP resonance effect of one-dimensional structures, CRs can enhance the spectral control ability of the emitter. In addition, Rostamnejadi et al also investigated the effects of structural parameters and temperature on cylindrical 2D W photonic crystals with the FDTD method (Rostamnejadi and Daneshvar, 2018), indicating that the emittance at 1500 K is higher than that of 300 K. The main reason is that the electron-phonon interaction enhances with increasing temperature. Therefore, to match different operating temperatures of the TPV system, the period, depth, and radius of the 2D array cavity can also be optimized.…”

Section: Introductionmentioning

confidence: 99%

Emission mechanism and wide-angle adaptability of selective emitter based on combination of one and two-dimensional photonic crystals

Cao

Cai²,

Zhang³

et al. 2023

Front. Energy Res.

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In this paper, a thermophotovoltaic (TPV) emitter that combines a one-dimensional photonic crystal with two-dimensional periodic nanoarray cavities was proposed. The Finite-Difference Time-Domain (FDTD) method was adopted to analyze the spectral emittance and its sensitivity to the emission angle for the proposed emitter. The results show that the main emission mechanisms of the emitter are Cavity Resonances (CRs), Fabry-Perot (FP) resonances, and Magnetic polaritons (MPs). In the convertible band of a TPV cell, CRs and FP resonances are coupled together to broaden the emitting bandwidth of the emitter. The cut-off wavelength of structural spectral emittance increases with depth and radius but decreases with a period. In addition, the spectral emittance is non-sensitive to the emission angle of less than 50°, highlighting the wide-angle stability of the composite structure. The proposed emitter has wide-angle adaptability and achieves a fine-tunning of bandgap wavelength while maintaining a good spectral selectivity. This work provides new insight into the design of the TPV emitter.

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Section: Introductionmentioning

confidence: 99%

Emission mechanism and wide-angle adaptability of selective emitter based on combination of one and two-dimensional photonic crystals

Cao

Cai²,

Zhang³

et al. 2023

Front. Energy Res.

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Optical emissivity dataset of multi-material heterogeneous designs generated with automated figure extraction

et al. 2022

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Optical device design is typically an iterative optimization process based on a good initial guess from prior reports. Optical properties databases are useful in this process but difficult to compile because their parsing requires finding relevant papers and manually converting graphical emissivity curves to data tables. Here, we present two contributions: one is a dataset of thermal emissivity records with design-related parameters, and the other is a software tool for automated colored curve data extraction from scientific plots. We manually collected 64 papers with 176 figures reporting thermal emissivity and automatically retrieved 153 colored curve data records. The automated figure analysis software pipeline uses Faster R-CNN for axes and legend object detection, EasyOCR for axes numbering recognition, and k-means clustering for colored curve retrieval. Additionally, we manually extracted geometry, materials, and method information from the text to add necessary metadata to each emissivity curve. Finally, we analyzed the dataset to determine the dominant classes of emissivity curves and determine the underlying design parameters leading to a type of emissivity profile.

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Screening and optimization of metal-insulator-metal selective emitter in thermophotovoltaic system

Ren,

Wang,

Liu

et al. 2023

Mod. Phys. Lett. B

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In thermophotovoltaic (TPV) systems, it is crucial that the selective emitters can tailor emission spectrum to match the bandgap of photovoltaic (PV) cells and largely enhance the system efficiency. In this work, a metamaterial emitter based on the metal-insulator-metal (MIM) structure is proposed to obtain the high energy conversion efficiencies. The geometric parameters of MIM emitter have been investigated to obtain an excellent radiation spectrum of emitter composed of W and HfO2. The excellent emission performance of MIM emitter is attributed to the excitation of surface plasmon polariton (SPP) and cavity resonance, and the structure of MIM emitter is insensitive for different polarization modes. The 21 material combinations of MIM emitters have been screened to obtain the optimal emitter matching GaSb and InGaAsSb cells. This work identifies the crucial role of structure and materials into the emitter of a TPV system. In the evaluation of MIM emitter and TPV System, when the operating temperature of emitter increases from 1400[Formula: see text]K to 2000[Formula: see text]K, the system efficiency of optimal W/HfO2/W MIM emitter increases from 20.26% to 30.41%, while the output electric power increases from 3.59[Formula: see text]kW/m2 to 42.48[Formula: see text]kW/m2. The phenomenon indicates that the MIM emitter with the optimal material combinations and geometric parameters can significantly improve the matching degree with GaSb and InGaAsSb cells. Our results will be helpful to expand the optimization scope of metamaterial emitters in TPV systems.

show abstract

Two-dimensional tungsten photonic crystal selective emitter: effects of geometrical parameters and temperature

Cited by 3 publications

References 44 publications

Emission mechanism and wide-angle adaptability of selective emitter based on combination of one and two-dimensional photonic crystals

Emission mechanism and wide-angle adaptability of selective emitter based on combination of one and two-dimensional photonic crystals

Optical emissivity dataset of multi-material heterogeneous designs generated with automated figure extraction

Screening and optimization of metal-insulator-metal selective emitter in thermophotovoltaic system

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