Effect of Confinement Strength on the Conversion Efficiency of Strained Core–Shell Quantum Dot Solar Cell

The conversion efficiency (CE) of core–shell quantum dot (CSQD) solar cell is investigated within weak and strong confinements strength, using detailed balance model. The weak and strong confinement strength is modeled using ZnTe/ZnSe and PbS/CdS CSQD, respectively. Considering size-dependent strain...

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Bibliographic Details
Published inOptics and spectroscopy Vol. 128; no. 10; pp. 1649 - 1657
Main Authors Sahu, Anupam, Kumar, Dharmendra
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.10.2020
Springer Nature B.V
Subjects
Confinement
Excitons
Lasers
Optical Devices
Optical Materials
Optics
Photonics
Photovoltaic cells
Physics
Physics and Astronomy
Quantum dots
Solar cells
Strength
quantum dot
multiple exciton generation
conversion efficiency
solar cell
core–shell
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Summary:The conversion efficiency (CE) of core–shell quantum dot (CSQD) solar cell is investigated within weak and strong confinements strength, using detailed balance model. The weak and strong confinement strength is modeled using ZnTe/ZnSe and PbS/CdS CSQD, respectively. Considering size-dependent strain, the results of CE of CSQD solar cell for varying core radius is plotted with and without considering multiple exciton generation (MEG), and the results show the improvement in CE with MEG, thus indicating its importance in the low-dimensional system. The numerical results demonstrate that for the same CSQD size, the solar cell with a stronger confinement strength achieves the higher CE in comparison to the weaker confinement. Also, the MEG significantly increases the CE of stronger confined CSQD solar cell. The results plotted are in good agreement with the literature.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X20100033