effect of absorption coefficients in upper efficiency limit of intermediate band solar cells

In this paper, the idea of an intermediate band solar cell which increases the efficiency of solar cells is considered. by using quantum dots the idea of intermediate band solar cell can be achieved at an acceptable level. actual results of using quantum dots have led to decreased efficiency of solar cells. the effect of absorption coefficients on the upper limit of efficiency in special types of solar cells is the focus of this paper. the main factors that have the most impact on the upper limit of efficiency of our position of intermediate bands and consequently the structure of quantum dots are analyzed. furthermore, the changes in cell characteristics, quantum dot type, quantum dot structure, and even polarization of the incident light can change the upper limit of efficiency. changes in distance layers of quantum dots create different results for different polarization of light for the upper limit of efficiency. using the results of this research can be a way to new research in the field of solar cells with quantum dots and the optimum use of solar cells will be useful..