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In this study, effects of the shell material and confinement type on theconversion efficiency of the core/shell quantum dot nanocrystal (QDNC) solarcells have been investigated in a detail manner. For this purpose, theconventional, i.e original, detailed balance model, developed by Shockley andQueisser to calculate an upper limit for conversion efficiency of silicon p-njunction solar cells, is modified in a simple and an effective way andcalculated the conversion efficiency of core/shell QDNC solar cells. Since theexisting model relies on the gap energy ($E_g$) of the solar cell, it does notmake an estimation about the effect of QDNC materials on the efficiency of thesolar cells and gives the same efficiency values for several QDNC solar cellswith the same $E_g$. The proposed modification, however, estimates a conversionefficiency in relation to the material properties and also confinement type ofthe QDNCs. The results of the modified model show that, in contrast to theoriginal one, the conversion efficiencies of different QDNC solar cells, evenif they have the same $E_g$, become different depending upon the confinementtype and shell material of the core/shell QDNCs and this is crucial in designand fabrication of the new generation solar cells to predict the confinementtype and also appropriate QDNC materials for better efficiency.

Effect of the shell material and confinement type on the conversion efficiency of the core/shell quantum dot nanocrystal solar cells