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- W2619611119 abstract "This paper conceptualizes vertical junction, graded bandgap AlfGa1–fAs rectangular-slab and cylindrical solar cells. The cells are analyzed through numerical modeling under drift-diffusion transport framework. We find that, these special cells can significantly increase photo-current density due to asymmetry between light receiving and electrical contact areas, while at the same time bandgap grading within quasi-neutral regions enables both near band edge and short wavelength absorption. Under AM 1.5G, 1000-W/ $text{m}^{2}$ illumination to the light receiving area (hence, electrical contacts receive 32 sun power during actual photo conversion), we find that rectangular-slab cells can outperform cylindrical cells of identical dimension and exhibit maximum 529.8 mA/cm2 short circuit current density, 1 V open circuit voltage and 0.88 fill factor when maximum aluminum mole fraction is fixed at 0.175, and band gap grading is fixed within 15.24 and $3.81~mu text{m}$ from respective depletion edges (p and n). Furthermore, we find that through a combination of bandgap grading and mole fraction tailoring, maximum $4.91times 10^{4}$ and $1.96times 10^{5}$ V/m (p and n) built-in fields can be achieved, when bandgap grading is made in 0.05- and 0.2-eV/ $mu text{m}$ (p and n) steepness, which results in 46.8 percent efficiency in graded rectangular-slab cells" @default.
- W2619611119 created "2017-06-05" @default.
- W2619611119 creator A5055874148 @default.
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- W2619611119 date "2017-06-01" @default.
- W2619611119 modified "2023-09-27" @default.
- W2619611119 title "Modeling and Analysis of Vertical p-n Junction, Graded Bandgap Al<italic>f</italic>Ga1–<italic>f</italic>As Rectangular-Slab and Cylindrical Solar Cells on Elevated GaAs Ridge and Wire" @default.
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- W2619611119 doi "https://doi.org/10.1109/ted.2017.2692267" @default.
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