Spatial profiles of photon chemical potential in near-field thermophotovoltaic cells
arXiv:2103.14740 · doi:10.1063/5.0047241
Abstract
Emitted photons stemming from the radiative recombination of electron-hole pairs carry chemical potential in radiative energy converters. This luminescent effect can substantially alter the local net photogeneration in near-field thermophotovoltaic cells. Several assumptions involving the luminescent effect are commonly made in modeling photovoltaic devices; in particular, the photon chemical potential is assumed to be zero or a constant prescribed by the bias voltage. The significance of photon chemical potential depends upon the emitter temperature, the semiconductor properties, and the injection level. Hence, these assumptions are questionable in thermophotovoltaic devices operating in the near-field regime. In the present work, an iterative solver that combines fluctuational electrodynamics with the drift-diffusion model is developed to tackle the coupled photon and charge transport problem, enabling the determination of the spatial profile of photon chemical potential beyond the detailed balance approach. The difference between the results obtained by allowing the photon chemical potential to vary spatially and by assuming a constant value demonstrates the limitations of the conventional approaches. This study is critically important for performance evaluation of near-field thermophotovoltaic systems.
arXiv comment40 pages, 11 figures
References in corpus (10)
- Graphene-based photovoltaic cells for near-field thermal energy conversion
- Integrated near-field thermo-photovoltaics for on-demand heat recycling
- Impacts of propagating, frustrated and surface modes on radiative, electrical and thermal losses in nanoscale-gap thermophotovoltaic power generators
- Entropic and Near-Field Improvements of Thermoradiative Cells
- Heat meets light on the nanoscale
- On the effect of surface recombination in thin film solar cells, light emitting diodes and photodetectors
- Coupled Charge and Radiation Transport Processes in Thermophotovoltaic and Thermoradiative Cells
- Design of an indium arsenide cell for near-field thermophotovoltaic devices
- External luminescence and photon recycling in near-field thermophotovoltaics
- Sesame: a 2-dimensional solar cell modeling tool
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- Effect of top metallic contacts on energy conversion performances for near-field thermophotovoltaics