Abstract

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) [CrossRef]  ] is further modified in this paper to obtain a more realistic conversion efficiency (CE) of the ${\rm CdSe}/{{\rm CdSe}_x}{{\rm S}_{1 - x}}/{\rm CdS}$ 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.

© 2021 Optical Society of America

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