Quantum dots gold nanoparticles/porous silicon/silicon for solar cell applications

Khalifa, M.J.; Jaduaa, M. H.; Ahmed, N.

doi:10.1016/j.matpr.2021.03.173

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…XRD were tested by kα Cu source line of 1.543 Å wavelength. Strong, conical, pointed single peak, at 2θ = 69.28° oriented along the (400) direction can be seen in figures(2), confirming the monocrystalline structure of the PS layer.…”

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confidence: 53%

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Effect of increasing etching time on the efficiency of porous silicon solar cells

Khalifa

2023

J. Phys.: Conf. Ser.

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In this work, p-type silicon wafers were electrochemically etched to create nanocrystalline silicon (porous silicon (PS)) films. Different etching periods (5, 10, 15, and 20 minutes) were investigated to see how they affected the development of a nanosized pore array with a constant etching current density (10 mA/cm2). To prevent oxidation, PS samples were stored in methanol after preparation. PS is characterized by X-ray diffraction (XRD), and atomic force microscopy (AFM). At varied etching times (5, 10, 15, and 20 min), the crystallite size as determined by XRD was equal to (66.39, 88.13, 31.2, and 21.21) nm, respectively. The nanometric size was verified via AFM. The porosity of PS increased as the etching time increased; the maximum value was obtained at a 20-minute etching time. The C-V characteristic of PS/Si heterojunction describes control factors like built-in potential (Vbi) and the kind of connection, a linear relationship of 1/C2 with bias voltage indicating that the junction is an abrupt type. Vbi was calculated for PS/p-Si/Al heterojunction at different etching times, and it was between (1.1-1.8) volt. I-V characteristics under illumination showed an enhancement in the efficiency of the PS/Si/Al solar cells. The maximum value of the solar cell efficiency was 6.79% occurs at 15 min time of etching.

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confidence: 53%

“…PS has a variety of distinctive qualities, including improved light absorption and visible light emission. The most popular techniques for creating PS substrates are still electrochemical anodization and stain etching [2]. Porous silicon (PS) is a type of silicon crystal that has a network of voids running through it.…”

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confidence: 99%

Effect of increasing etching time on the efficiency of porous silicon solar cells

Khalifa

2023

J. Phys.: Conf. Ser.

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“…These decorated silicon nanowire systems will serve as a platform to investigate EP coupling. There are many published articles that show the enhancement of their performance by decoration with gold nanostructure on Si nanostructure like in luminescence, − sensing, ,− solar cell efficiency, ,, and surface-enhanced Raman spectroscopy (SERS). ,, Also, the increase in photocurrent was observed by the platinum decorated SiNWs . However, there is not sufficient analysis on EP coupling, which is the main mechanism of enhancement of their performances.…”

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confidence: 99%

Unraveling Exciton–Plasmon Coupling and the PIRET Mechanism in Decorated Silicon Nanowires

Diwan,

Yadav,

Shekhawat

et al. 2024

J. Phys. Chem. Lett.

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Exciton−plasmon coupling is a fascinating physical phenomenon that has been investigated in various metal semiconductor systems. Intentionally chosen silicon nanowires (SiNWs) systems act as a host material for providing exciton as well as silicon oxide as a thin dielectric. A clear blue-shift in photoluminescence (PL) peak and a significant increase in visible range absorption were observed for metal nanoparticle (MNP) decorated SiNWs (D-SiNWs) which signifies the presence of exciton−plasmon coupling. A further investigation reveals that the possibility of the occurrence of the plasmon-induced resonance energy transfer (PIRET) mechanism is higher. The PL intensity enhancement in Au-decorated SiNWs is higher (∼38 times) in comparison to that in Pt due to the presence of a strong and localized electric field of plasmons near the interface of metal and semiconductors. Moreover, splitting in PL for gold-decorated SiNWs might be due to the presence of dipole−quadrupole coupling along with dipole−dipole coupling, which further increases the strength of the PIRET mechanism.

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Quantum dots gold nanoparticles/porous silicon/silicon for solar cell applications

Cited by 2 publications

References 11 publications

Effect of increasing etching time on the efficiency of porous silicon solar cells

Effect of increasing etching time on the efficiency of porous silicon solar cells

Unraveling Exciton–Plasmon Coupling and the PIRET Mechanism in Decorated Silicon Nanowires

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