TY - JOUR
T1 - Energetic optimization effects in single resonant tunneling GaAs-nanoconverters
AU - Valencia-Ortega, G.
AU - Arias-Hernandez, L. A.
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/10
Y1 - 2020/10
N2 - Several models of thermionic energy nanoconverters have been proposed to study the transport phenomena that take place in electronic devices. For example, in resonant tunneling junctions those phenomena are manifested through the thermoelectric effects. The coupling between the electron flux and the heat flux in this type of semiconductor heterostructures, not only allows to obtain transport coefficients (electrical and thermal conductivities, and a Seebeck-like and Peltier-like coefficients), but also to study its operation as a thermionic generator or as a refrigerator within the context of irreversible thermodynamics. The existence of the characteristic steady states that can be reached by any linear energy converter led us to characterize a family of Seebeck-like coefficients, as well as establish bounds for the values of a kind of figure of merit (TzD,I ′), both associated with the well-known operating regimes: minimum dissipation function, maximum power output, maximum efficiency and maximum compromise function. By taking as example an AlxGaAs/GaAs junction, we found that the transport coefficients depend strongly on temperature and the conduction band height, which can be modulated according to the selected operation mode.
AB - Several models of thermionic energy nanoconverters have been proposed to study the transport phenomena that take place in electronic devices. For example, in resonant tunneling junctions those phenomena are manifested through the thermoelectric effects. The coupling between the electron flux and the heat flux in this type of semiconductor heterostructures, not only allows to obtain transport coefficients (electrical and thermal conductivities, and a Seebeck-like and Peltier-like coefficients), but also to study its operation as a thermionic generator or as a refrigerator within the context of irreversible thermodynamics. The existence of the characteristic steady states that can be reached by any linear energy converter led us to characterize a family of Seebeck-like coefficients, as well as establish bounds for the values of a kind of figure of merit (TzD,I ′), both associated with the well-known operating regimes: minimum dissipation function, maximum power output, maximum efficiency and maximum compromise function. By taking as example an AlxGaAs/GaAs junction, we found that the transport coefficients depend strongly on temperature and the conduction band height, which can be modulated according to the selected operation mode.
KW - Energetic optimization
KW - Figure of merit
KW - Non-equilibrium thermodynamics
KW - Resonant tunneling devices
UR - http://www.scopus.com/inward/record.url?scp=85085258014&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2020.114231
DO - 10.1016/j.physe.2020.114231
M3 - Artículo
SN - 1386-9477
VL - 124
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
M1 - 114231
ER -