Design of Multilayer Ring Emitter Based on Metamaterial for Thermophotovoltaic Applications

Maremi, Fekadu Tolessa; Lee, Namkyu; Choi, Geehong; Kim, Tae‐Hwan; Cho, Hyung Hee

doi:10.3390/en11092299

Cited by 32 publications

(24 citation statements)

References 38 publications

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“…For emitted photons with energy lower than the bandgap where absorption is not optimum, a selective filter can be used to redirect source and hence improve the efficiency. The efficiency of TPV system, η TPV to convert radiated heat to electrical power is expressed as follow [48]:…”

Section: Tpv System Overviewmentioning

confidence: 99%

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A Review on Thermophotovoltaic Cell and Its Applications in Energy Conversion: Issues and Recommendations

et al. 2021

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Generally, waste heat is redundantly released into the surrounding by anthropogenic activities without strategized planning. Consequently, urban heat islands and global warming chronically increases over time. Thermophotovoltaic (TPV) systems can be potentially deployed to harvest waste heat and recuperate energy to tackle this global issue with supplementary generation of electrical energy. This paper presents a critical review on two dominant types of semiconductor materials, namely gallium antimonide (GaSb) and indium gallium arsenide (InGaAs), as the potential candidates for TPV cells. The advantages and drawbacks of non-epitaxy and epitaxy growth methods are well-discussed based on different semiconductor materials. In addition, this paper critically examines and summarizes the electrical cell performance of TPV cells made of GaSb, InGaAs and other narrow bandgap semiconductor materials. The cell conversion efficiency improvement in terms of structural design and architectural optimization are also comprehensively analyzed and discussed. Lastly, the practical applications, current issues and challenges of TPV cells are critically reviewed and concluded with recommendations for future research. The highlighted insights of this review will contribute to the increase in effort towards development of future TPV systems with improved cell conversion efficiency.

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Section: Tpv System Overviewmentioning

confidence: 99%

“…The efficiency of TPV system,

to convert radiated heat to electrical power is expressed as follow [ 48 ]:

where

is the spectral efficiency of the radiator which is presented as:

where E

is the blackbody spectrum and ε

is the spectral emissivity of the proposed selective radiator metamaterial.…”

Section: Tpv System Overviewmentioning

confidence: 99%

A Review on Thermophotovoltaic Cell and Its Applications in Energy Conversion: Issues and Recommendations

et al. 2021

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“…The PV cells used in TPV systems include silicon (Si), Gallium antimonide (GaSb), copper indium gallium diselenide (CIGS), Indium gallium arsenide (InGaAs), and Germanium [21]. The overall design depends on whether the TPV system is a near-field thermophotovoltaics (NF-TPV) [28], a nano-gap TPV [29,30], or a micro-TPV [12]. This classification is based on the core distance between the radiator and the PV cells.…”

Section: Description Of a Thermophotovoltaic Systemmentioning

confidence: 99%

Radiation-Thermodynamic Modelling and Simulating the Core of a Thermophotovoltaic System

et al. 2020

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Thermophotovoltaic (TPV) systems generate electricity without the limitations of radiation intermittency, which is the case in solar photovoltaic systems. As energy demands steadily increase, there is a need to improve the conversion dynamics of TPV systems. Consequently, this study proposes a novel radiation-thermodynamic model to gain insights into the thermodynamics of TPV systems. After validating the model, parametric studies were performed to study the dependence of power generation attributes on the radiator and PV cell temperatures. Our results indicated that a silicon-based photovoltaic (PV) module could produce a power density output, thermal losses, and maximum voltage of 115.68 W cm−2, 18.14 W cm−2, and 36 V, respectively, at a radiator and PV cell temperature of 1800 K and 300 K. Power density output increased when the radiator temperature increased; however, the open circuit voltage degraded when the temperature of the TPV cells increased. Overall, for an 80 W PV module, there was a potential for improving the power generation capacity by 45% if the TPV system operated at a radiator and PV cell temperature of 1800 K and 300 K, respectively. The thermal efficiency of the TPV system varied with the temperature of the PV cell and radiator.

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“…3 Some metamaterials have been reported for their selective emission properties in the near-and midinfrared spectra. [4][5][6] However, these selective MM emitters are made of multiple dielectric and metallic layers or have nanometer-scale feature sizes where fabrication is difficult and can lead to pattern imperfections that may lower the performances. Besides the difficulty of fabrication, MM emitters with feature sizes in nanometer scales may have other challenges.…”

Section: Introductionmentioning

confidence: 99%

Design of an All-Semiconductor Selective Metamaterial Emitter in the Mid-IR Regime with Larger Feature Sizes for Thermophotovoltaic Energy Conversion Applications

Carlson

Vandervelde

2020

Journal of Elec Materi

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A thermophotovoltaic (TPV) system converts heat that is absorbed via conduction, convection, and/or radiation to electricity. The efficiency of TPV energy conversion can be improved with a narrowband selective emitter that emits photons at just above the bandgap energy towards the TPV photodiode. We numerically report a selective metamaterial (MM) emitter design with a single layer of cylindrical structures of p-type silicon (boron-doped). Our design (substrate-free) features a peak absorbance of 94.8% at the wavelength of 3.47 lm with the smallest lateral dimension of 0.8 lm. The absorption is found to be due to the resonance of electric and magnetic fields in the structure. The larger dimensions of our selective MM emitter design make it significantly easier to pattern than many of previously reported selective MM emitters operating at similar wavelengths to that of our work. We believe that our work demonstrates a path forward for future research on larger-area all-semiconductor selective MM emitters with a variety of peak absorbance wavelengths for TPV applications.

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Design of Multilayer Ring Emitter Based on Metamaterial for Thermophotovoltaic Applications

Cited by 32 publications

References 38 publications

A Review on Thermophotovoltaic Cell and Its Applications in Energy Conversion: Issues and Recommendations

A Review on Thermophotovoltaic Cell and Its Applications in Energy Conversion: Issues and Recommendations

Radiation-Thermodynamic Modelling and Simulating the Core of a Thermophotovoltaic System

Design of an All-Semiconductor Selective Metamaterial Emitter in the Mid-IR Regime with Larger Feature Sizes for Thermophotovoltaic Energy Conversion Applications

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