The intrinsic losses of quantum dot intermediate band solar cells

摘要

Thermalisation and below-bandgap loss mechanisms of intermediate band solar cells (IBSCs) comprised of InAs(1?x)Nx quantum dots (QDs) embedded within intrinsic layer of AlP0.5Sb0.5 p-i-n solar cell is calculated. a Finite element method is used for solving Schr?dinger equation to calculate possible energy band configurations of AIP0.5Sb0.5: barrier/InAs(1?x)Nx: square pyramid-shaped QDs with different nitrogen concentration. It is found that there is a minimum total loss of ～27% for nitrogen concentration less than 0.01 of InAs(1?x)Nx QD-IBSCs.