P3 N4

P3N4

Materials and geometry:  

P Leg: Cu₂Se

Reference: Tak, Jang Yeul , et al. "Ultralow Lattice Thermal Conductivity and Significantly Enhanced Near-Room-Temperature Thermoelectric Figure of Merit in α-Cu2Se through Suppressed Cu Vacancy Formation by Overstoichiometric Cu Addition." Chemistry of Materials (2018):acs.chemmater.8b00254.

N Leg: AgSSe

Reference: Liang J, Wang T, Qiu P, et al. Flexible thermoelectrics: from silver chalcogenides to full‐inorganic devices. Energ Environ Sci. 2019;12(10):2983‐2990.

The best COP under different DeltaT:

 

The cooling power density at best COP under different DeltaT :

 

The current density at best COP under different DeltaT :

 

how do COP and cooling power change with current density when deltaT=0.9 delta Tmax:

 

how do COP and cooling power change with current density when deltaT=0.6 delta Tmax:

 

how do COP and cooling power change with current density when deltaT= 0.3delta Tmax:

 

how do COP and cooling power change with current density when deltaT= 0.1delta Tmax:

 

The optimum leg cross-section ratio