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- W4381330708 abstract "Abstract Near-field radiation has been widely shown to greatly boost the electrical power of thermophotovoltaic (TPV) cells. However, there is a lack of theoretical analysis exploring the important influences of near-field effects on radiative absorption distributions as well as TPV energy conversion performances. This work investigates the electrical performances of near-field TPV cells made of InGaSb coupled with different practical emitters such as plain tungsten (W), indium tin oxide (ITO) film, and alternate W and alumina multilayer in detail. A comprehensive analysis is conducted to systematically compare the impacts of evanescent wave tunneling, surface plasmon resonance, and hyperbolic modes on spatial distributions of radiative absorption and the profiles of local carrier concentrations. The detailed and accurate analysis reveals the crucial role of near-field radiation emitted by various emitters in charge collection efficiency, thermal photon flux penetration depth, and photocurrent generation. Thus, the results certify that the electric power could be enhanced by utilizing ITO and multilayer emitters instead of a plain W emitter. The efficiency for an ITO emitter increases with decreasing vacuum gap owing to the suppressed bulk recombination but decreases when the vacuum gap falls below 18 nm due to increased surface recombination. While the efficiency for a multilayer emitter is comparatively lower due to the larger sub-bandgap photons and inefficient n -region. Furthermore, we verify the strategies for performance improvement via decreasing the surface recombination and optimizing the p -region thickness. The underlying mechanism is interpreted based on the spatial distribution and the collection efficiency of minority carriers." @default.
- W4381330708 created "2023-06-21" @default.
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- W4381330708 date "2023-06-29" @default.
- W4381330708 modified "2023-10-18" @default.
- W4381330708 title "Near-field thermophotovoltaic energy conversion analysis based on enhanced radiative absorption distribution" @default.
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- W4381330708 doi "https://doi.org/10.1088/1361-6463/acdfd9" @default.
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