RF magnetron sputtering of Ga2 O3 thin films: Analysis of oxygen flow rate impact on stoichiometry, structural, optical characteristics, and energy band alignments

Biswas, Mandira; Pyngrope, Dariskhem; Kumar, Shiv; Majumdar, Shubhankar; Bag, Ankush

doi:10.1016/j.mssp.2023.107937

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…Therefore, the lower work function value observed for the 250 • C deposited TiO 2 sample suggests that electrons can more easily transport across the interface than the other samples. The lower work function may be due to fewer defects in the respected sample [32].…”

Section: Resultsmentioning

confidence: 99%

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO₂ contact deposition temperature

Pandey,

Kumar,

Mondal

et al. 2024

J. Phys. D: Appl. Phys.

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Carrier selective contacts are a primary requirement for fabricating silicon heterojunction solar cells (SHSCs). TiO2 is a prominent carrier selective contact in SHSCs owing to its excellent optoelectronic features such as suitable band offset, work function, and cost-effectiveness. Herein, we fabricated simple SHSCs in an Al/TiO2/p-Si/Ti/Au device configuration. Ultrathin 3 nm TiO2 layers were deposited onto a p-type silicon substrate using the atomic layer deposition method. The deposition temperature of TiO2 layers varied from 100 °C to 250 °C. X-ray photoelectron spectroscopic studies suggest that deposition temperature highly affects the chemical states of TiO2 and reduces the formation of defective state densities at the Fermi energy. The optical band gap values of TiO2 layers are also altered from 3.13 eV to 3.27 eV when the deposition temperature increases. The work function tuning from -5.13 eV to -4.83 eV has also been observed in TiO2 layers, suggesting the variation in Fermi level tuning, which arises due to changes in carrier concentrations at higher temperatures. Several device parameters, such as ideality factor, trap density, reverse saturation current density, barrier height, etc., have been quantified to comprehend the effects of deposition temperature on photovoltaic device performance. The results suggest that the deposition temperature significantly influences the charge transport and device performance. At an optimum temperature, a significant reduction in charge carrier recombination and trap state density has been observed, which helps to improve power conversion efficiency.

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Section: Resultsmentioning

confidence: 99%

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO₂ contact deposition temperature

Pandey,

Kumar,

Mondal

et al. 2024

J. Phys. D: Appl. Phys.

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RF magnetron sputtering of Ga2O3 thin films: Analysis of thermal annealing induced tuning of structural, optical characteristics, and energy band alignments

Pyngrope,

Biswas,

Kumar

et al. 2024

Materials Science in Semiconductor Processing

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Exploring Phase and Bandgap Variations in Gallium Oxide Using Mist-based Chemical Vapor Deposition System

Kumar,

Mondal,

Pandey

et al. 2024

2024 8th IEEE Electron Devices Technology &Amp;amp; Manufacturing Conference (EDTM)

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RF magnetron sputtering of Ga2 O3 thin films: Analysis of oxygen flow rate impact on stoichiometry, structural, optical characteristics, and energy band alignments

Cited by 3 publications

References 39 publications

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO₂ contact deposition temperature

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO₂ contact deposition temperature

RF magnetron sputtering of Ga2O3 thin films: Analysis of thermal annealing induced tuning of structural, optical characteristics, and energy band alignments

Exploring Phase and Bandgap Variations in Gallium Oxide Using Mist-based Chemical Vapor Deposition System

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RF magnetron sputtering of Ga2 O3 thin films: Analysis of oxygen flow rate impact on stoichiometry, structural, optical characteristics, and energy band alignments

Cited by 3 publications

References 39 publications

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO2 contact deposition temperature

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO2 contact deposition temperature

RF magnetron sputtering of Ga2O3 thin films: Analysis of thermal annealing induced tuning of structural, optical characteristics, and energy band alignments

Exploring Phase and Bandgap Variations in Gallium Oxide Using Mist-based Chemical Vapor Deposition System

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Product

Resources

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Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO₂ contact deposition temperature

Optimizing charge transport and band-offset in silicon heterojunction solar cells: impact of TiO₂ contact deposition temperature