Theoretical modeling of a 'giant' colloidal core-shell quantum dot with an alloyed interfacial layer for solar cell applications

摘要

We proposed a theoretical modeling of a "giant" colloidal core-shell quantum dot with a strain-adapting alloyed interfacial layer between the core and shell materials for solar cell applications. The recently modified detailed balance model [J. Appl. Phys. 125, 174302 (2019)] is further modified in this paper to obtain a more realistic conversion efficiency (CE) of the CdSe/CdSexS1-x/CdS quantum dot solar cell. This proposed model computes the CE, considering the significant impact of the energy gap and oscillator strength simultaneously. The CE is investigated for different alloying factors "x" by considering the strain effect between the heterostructure. The results obtained in terms of CE and photoluminescence peak wavelength nearly approximate the experimental studies of similar dot structure and dimensions. (C) 2021 Optical Society of America