Thermodynamic behavior of SMPC

The thermodynamic behavior of single molecule-photon cryocooler( SMPC) was described by the study of participating frequency of phonons in light trans itions, heat-light converting efficiency and cooling efficiency. The times of heat distribution were taken as a time scale in the investigation of coo ling efficiency. The cooling efficiency curve obtained from our theory has the same shape of experiment curves obtained by other researchers. The reas on of a bending of cooling efficiency curve appearing in the cooling region was given. The greatest cooling efficiency of SMPC was investigated, and i t is obtained that the best wavelength, which results in the greatest cooli ng efficiency, is located at the point of one fourth exciting band width fr om the red edge. As a main conclusion, crystal-line materials are the sole kind of promising materials for obtaining the greatest cooling efficiency.