Department of Electrical and Electronics Engineering

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Author: search.filters.author.Mourya, Satyendra KumarSubject: search.filters.subject.Intermediate band solar cell (IBSC)

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    Study of Quantum Dot Solar Cell Including CdTe Quantum Dots Embedded in Al0.3 Ga0.7 As/GaAs Quantum Wells
    (IEEE, 2024) Mourya, Satyendra Kumar
    Intermediate Band Solar Cells were proposed in 1997 as an alternative to tandem solar cells to achieve high efficiency in a photovoltaic device. It has a proposed theoretical limit of 63.2%, much higher than the 33% of a single-junction solar cell. In this study, we explore the photovoltaic performance of CdTe Quantum Dots embedded in Al0.3Ga0.7As/GaAs Quantum Wells for the first time using SCAPS-1D software. This arrangement leads to the formation of intermediate energy levels due to Quantum Confinement, which has been exploited to form a Hole Injection Layer and increase Quantum Efficiency. Further, a detailed study of the device’s band diagram in both illuminated and illuminated cases is provided, offering crucial insights into its performance and working. The best-optimized device yielded a maximum power conversion efficiency of 31.8%, Quantum Efficiency (QE) of 80% over the visible range, open-circuit voltage VOC of 1.36 and fill factor (F= r) ranging between 77%−85%.
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    Submonolayer InAs Quantum Dot Based Solar Cell: A New Approach Towards Intermediate Band Solar Cell
    (Bentham Science, 2023) Mourya, Satyendra Kumar; Kumar, Rahul
    This chapter summarizes the progress of InAs submonolayer (SML) quantum dot (QD) based intermediate band solar cell (IBSC). A brief background of intermediate band solar cells (IBSC) will be presented. Different IBSC prototypes will be discussed. The importance of quantum dots (QDs) for IBSC prototyping will be illustrated. An alternative of the most extensively used Stranski-Krastanow (SK)-QDs named SML QDs will be introduced. The fabrication of SML-QD-based IBSC will be discussed from the material point of view. We will also discuss the physics behind the improved performance of these SCs. Important research in this field will be reviewed. Finally, the future direction will be suggested to further improve the performance.