Design and analysis of a graphene-based Schottky junction solar cell with core/shell quantum dots as spectral downshifter

Gholamhossein Haghighat | Kamyar Saghafi

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=158430
Date :  2021/02/22
Publish in :    Journal of the Optical Society of America B: Optical Physics
DOI :  https://doi.org/10.1364/JOSAB.414889
Link :  http://dx.doi.org/10.1364/JOSAB.414889
Keywords :solar cell, graphene, core/shell quantum dot

Abstract :

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We theoretically design and study a structure of graphene/intrinsic amorphous-silicon Schottky junction solar cell (Gr/i-a-Si_SJSC) with top core/shell quantum dots (CSQDs). A physical model incorporated with optoelectrical characteristics is developed to optimize the structure’s electrical performance by modifying the graphene work function, temperature, and CSQD radius. imulations show that the conversion efficiency ofGr/i-a-Si_SJSC is increased by increasing the graphene work function, raising the core radius and shell thickness of CSQD and decreasing the temperature. The results reveal that with an appropriate choice of design parameter in an optimized structure, short-circuit current density of 16.2 mA=cm2, open-circuit voltage of 0.8 V, fill factor of 75.06, and calculated power conversion efficiency of 9.93 are obtained.