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研究了由两个单能级量子点分别与两电子库耦合而构成的混合驱动量子点制冷机的性能特征.考虑非辐射效应的情况下,论文应用主方程描述电子在传输过程中的动力学特性,导出了制冷机的制冷率和制冷系数,得到了其性能特征曲线,并分析和优化其性能.研究表明,由于非辐射效应的存在,制冷系数会降低,制冷率随制冷系数变化的特征曲线为回原点扭叶型曲线;两量子点能级差或者两库化学势差分别是外界提供的光能或者电能,只要有外界能量的输入,该模型就具有制冷效果.当光能或电能一定时,最大制冷系数下的制冷率和最大制冷率下的制冷系数都存在极大值;外界输入能量一定时,存在最佳温比,使得最大制冷系数下的制冷率达到极大值.
The performance characteristics of a hybrid driven quantum dot refrigerator which is composed of two single-level quantum dots coupled with two electronic libraries respectively are studied. In the case of non-radiative effects, the thesis uses the master equation to describe the dynamics of the electron during transport Characteristics, the refrigeration rate and refrigeration coefficient of the refrigerator are derived, and its performance characteristic curve is obtained, and its performance is analyzed and optimized.Research shows that due to the non-radiative effect, the refrigeration coefficient will decrease and the refrigeration rate changes with the characteristics of the refrigeration coefficient The curve is the twisting leaf curve of the origin; the energy difference between the two quantum dots or the chemical potential difference between the two reservoirs is the light energy or the electric energy provided by the outside world respectively, and the model has a cooling effect as long as there is external energy input. The refrigeration coefficient under the maximum cooling coefficient and the maximum cooling rate both have the maximum value. When the external input energy is constant, the optimal temperature ratio exists, so that the maximum cooling rate achieves the maximum cooling rate.