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Conception et optimisation de sources thermiques cohérentes pour applications thermo-photovoltaïques

E. Nefzaoui 1 
1 TNR - Thermique aux Nano échelles et Rayonnement
FTC - Département Fluides, Thermique et Combustion
Abstract : Thermo-photovoltaic conversion of thermal radiation is a concept that has been thoroughly investigated during the two last decades because of its high efficiency when compared to classical photovoltaics (PV). These high performances are mainly due to the good-matching between the thermal source radiation spectrum and the PV cell conversion spectrum. Maximal efficiencies are obtained with coherent sources that emit in narrow spectral bands, just above the band gap energy of the cell. In this report, a stochastic method to design and optimize such sources, the particle swarm optimization in this case, is firstly presented. This method leads to simple one-dimensional structures, composed of thin films of dielectrics, metals and semiconductors. The radiative properties of these sources are easily tunable with control parameters as simple as films thicknesses and doping concentrations. They are stable at high temperatures up to 1000 K. Second, a parametric optimization study of usual materials optical properties models (Drude and Lorentz) is presented in order to maximize radiative heat transfer between semi-infinite planes separated by nanometric gaps. This leads to a simple tool in the form of abacuses which would guide the choice of relevant materials to maximize the output power of nano thermo-photovoltaic devices.
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Submitted on : Wednesday, May 29, 2013 - 1:36:57 PM
Last modification on : Wednesday, October 20, 2021 - 3:22:27 AM
Long-term archiving on: : Friday, August 30, 2013 - 6:40:10 AM

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E. Nefzaoui. Conception et optimisation de sources thermiques cohérentes pour applications thermo-photovoltaïques. Thermique [physics.class-ph]. Université de Poitiers, 2013. Français. ⟨tel-00827557⟩

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