Journal
ENTROPY
Volume 19, Issue 9, Pages -Publisher
MDPI AG
DOI: 10.3390/e19090472
Keywords
efficiency; quantum coherence; Green functions; molecular electronics
Categories
Funding
- National Science Foundation [CHE-1565939]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1565939] Funding Source: National Science Foundation
Ask authors/readers for more resources
Recent developments in nanoscale experimental techniques made it possible to utilize single molecule junctions as devices for electronics and energy transfer with quantum coherence playing an important role in their thermoelectric characteristics. Theoretical studies on the efficiency of nanoscale devices usually employ rate (Pauli) equations, which do not account for quantum coherence. Therefore, the question whether quantum coherence could improve the efficiency of a molecular device cannot be fully addressed within such considerations. Here, we employ a nonequilibrium Green function approach to study the effects of quantum coherence and dephasing on the thermoelectric performance of molecular heat engines. Within a generic bichromophoric donor-bridge-acceptor junction model, we show that quantum coherence may increase efficiency compared to quasi-classical (rate equation) predictions and that pure dephasing and dissipation destroy this effect.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available