Entropy production in photovoltaic-thermoelectric nanodevices from the non-equilibrium Green's function formalism

Abstract : We discuss some thermodynamic aspects of energy conversion in electronic nanosystems able to convert light energy into electrical or/and thermal energy using the non-equilibrium Green's function formalism. In a first part, we derive the photon energy and particle currents inside a nanosystem interacting with light and in contact with two electron reservoirs at different temperatures. Energy conservation is verified, and radiation laws are discussed from electron non-equilibrium Green's functions. We further use the photon currents to formulate the rate of entropy production for steady-state nanosystems, and we recast this rate in terms of efficiency for specific photovoltaic-thermoelectric nanodevices. In a second part, a quantum dot based nanojunction is closely examined using a two-level model. We show analytically that the rate of entropy production is always positive, but we find numerically that it can reach negative values when the derived particule and energy currents are empirically modified as it is usually done for modeling realistic photovoltaic systems.
Type de document :
Article dans une revue
Journal of Physics: Condensed Matter, IOP Publishing, 2017, 29 (17), pp.175301 〈http://iopscience.iop.org/article/10.1088/1361-648X/aa62e4〉. 〈10.1088/1361-648X/aa62e4〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01527162
Contributeur : Adeline Crépieux <>
Soumis le : mercredi 24 mai 2017 - 09:36:47
Dernière modification le : jeudi 25 mai 2017 - 01:11:53

Identifiants

Collections

Citation

Fabienne Michelini, Adeline Crépieux, Katawoura Beltako. Entropy production in photovoltaic-thermoelectric nanodevices from the non-equilibrium Green's function formalism. Journal of Physics: Condensed Matter, IOP Publishing, 2017, 29 (17), pp.175301 〈http://iopscience.iop.org/article/10.1088/1361-648X/aa62e4〉. 〈10.1088/1361-648X/aa62e4〉. 〈hal-01527162〉

Partager

Métriques

Consultations de la notice

59