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We theoretically investigate the Seebeck and Peltier effect across aninteracting quantum dot(QD) coupled between a normal metal and aBardeen-Cooper-Schrieffer superconductor within the Coulomb blockade regime.Our results demonstrate that the thermoelectric conversion efficiency atoptimal power output (optimized with respect to QD energy level and externalserial load) in NQDS nanodevice can reach up to $58\%\eta_C$, where $\eta_C$ isCarnot efficiency, with output power $P_{max}\approx 35fW$ for temperaturebelow the superconducting transition temperature. Further, the Peltier coolingeffect is observed for a wide range of parameter regimes, which can beoptimized by varying the background thermal energy, QD level energy,QD-reservoir tunneling strength, and bias voltage. The results presented inthis study are within the scope of existing experimental capabilities fordesigning miniature hybrid devices that operate at cryogenic temperatures.

Seebeck power generation and Peltier cooling in a Normal metal-quantum dot-superconductor nanodevice