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Abstract
The thermal power (PF = S2Ge) depends on the Seebeck coefficient (S) and electron conductance (Ge). The enhancement of Ge will unavoidably suppress S because they are closely related. As a consequence, the optimization of PF is extremely difficult. Here, we theoretically investigated the thermoelectric properties of two-dimensional quantum dot (QD) arrays with carriers injected from electrodes. The Lorenz number of 2D QD arrays in the resonant tunneling procedure satisfies the Wiedemann-Franz law, which confirms the formation of minibands. When the miniband center is far away from the Fermi level of the electrodes, the electron transport is in the thermionic-assisted tunneling procedure (TATP). In this regime, Ge in band-like situation and S in atom-like situation can happen simultaneously. We have demonstrated that the enhancement of Ge with an increasing number of electronic states will not suppress S in the TATP.
Original language | English |
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Article number | 114406 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 126 |
DOIs | |
State | Published - Feb 2021 |
Keywords
- Minibands
- Power factor
- Quantum dot arrays
- Two dimensional system
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Dive into the research topics of 'Thermoelectric properties of finite two-dimensional quantum dot arrays with band-like electronic states'. Together they form a unique fingerprint.Projects
- 1 Finished
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Linear and Nonlinear Thermoelectric Properties of Quantum Dot Nanowires at Room Temperature(2/2)
1/08/19 → 31/07/20
Project: Research