Studies on silicon quantum dots prepared at different working pressure

Al-Agel, F.A.; Suleiman, Jamal; Khan, Shahanavaj

doi:10.1016/j.rinp.2017.03.002

Cited by 15 publications

(3 citation statements)

References 45 publications

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“…On increasing the chamber pressure of the ambient argon gas from 1 Torr to 3 Torr for a similar excitation wavelength (420 nm), we observed a slight shift in the peak position at the same wavelength (845 nm). This may be due to the change in particle size or band gap [70]. FESEM images of the synthesized nano thin films suggest that the variation in size of the nanochalcogenide particles accumulated on the ultrasonically cleaned glass substrates is not large hence the blue shift is missing from the obtained PL spectra [71].…”

Section: Pl Analysis Of Se 85 Te 3 Bi 12 Nano-thin Filmsmentioning

confidence: 98%

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Srivastava,

Khan,

Khan

2023

J. Phys. D: Appl. Phys.

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In this research work, we have synthesized non-crystalline Se85Te3Bi12 chalcogenide glasses by conventional melt quenching technique. The differential scanning calorimetry measurement of the synthesized specimen was done to confirm the glassy as well as non-crystalline nature of the bulk Se85Te3Bi12 alloy. The nano-thin films of thickness 30 nm of the synthesized sample at two different ambient argon pressures (1 Torr and 3 Torr) were made using the physical vapor condensation technique at a constant substrate temperature of 77 K using liquid nitrogen. The non-appearance of prominent peaks in the high-resolution x-ray diffractometer profile confirmed the non-crystalline nature of synthesized nano-thin films. The morphological analysis of the prepared nano-thin films using Field emission scanning electron microscopy confirmed the nanochalcogenide having particle size ranges from 30–90 nm. The Fourier transform infrared (FTIR) spectroscopy suggests the presence of moisture and carbon impurities in the prepared nano-thin films. The broad optical transmission shadow observed in the FTIR results is an essential requirement for new-generation IR systems. Based on UV-visible spectroscopy, optical parameters such as optical absorption coefficients, Urbach energy, optical band gaps, Tauc’s parameter and extinction coefficients were measured for synthesized Se85Te3Bi12 nano-thin films. The value of absorption coefficients, Tauc’s parameters, optical band gap and extinction coefficients increases with the increase of ambient argon pressure. The outcome of these studies recommends that these materials can be a preeminent candidate for photovoltaic applications. Photoluminescence spectroscopy results are accredited to the accumulation of non-crystalline nanochalcogenide particles on the substrates. DC conductivity measurements further confirm the semiconducting nature of the nanochalcogenide Se85Te3Bi12 thin films.

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Section: Pl Analysis Of Se 85 Te 3 Bi 12 Nano-thin Filmsmentioning

confidence: 98%

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Srivastava,

Khan,

Khan

2023

J. Phys. D: Appl. Phys.

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“…At low temperatures, the IPCE rose by up to 95% . The researchers demonstrated that when the working pressure increases, the band gap broadens . It is necessary to use the light source, its spectral distribution, and the AM1.5G intensity spectrum with an integrated power of 1000 W m –2 ) .…”

Section: Pec Water Splittingmentioning

confidence: 99%

“…106 The researchers demonstrated that when the working pressure increases, the band gap broadens. 107 It is necessary to use the light source, its spectral distribution, and the AM1.5G intensity spectrum with an integrated power of 1000 W m −2 ). 108 Semiconductors that have been doped with impurities may absorb both ultraviolet and visible light.…”

Section: ■ Introductionmentioning

confidence: 99%

Advanced Catalysts for Photoelectrochemical Water Splitting

Marwat

Humayun

Afridi

et al. 2021

ACS Appl. Energy Mater.

113

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Photoelectrochemical (PEC) water splitting offers a sparkling and sustainable strategy for hydrogen generation, and significant research for enhancing the conversion efficiency of electrocatalysts is underway, since a huge number of publications have been reported in this field. Hence, it is urgent to write a comprehensive and updated review in order to highlight the latest progress in the design, fabrication, and modification of electrocatalysts for high-efficiency PEC water splitting. In this review, we describe the basic mechanism of PEC water splitting utilizing electrocatalysts in detail. Further, we highlighted the recent advancements in the design, fabrication, and modification of high-efficiency electrocatalysts for energy conversion. In addition, the catalysts' surface passivation, heterojunction constructions, defect engineering, and photovoltage and photocurrent enhancements are also highlighted.

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2D Nanomaterial Photoelectrodes for Photoelectrochemical Degradation of Pollutants and Hydrogen Generation

Singh

Sharma

Devi

2023

Springer Series in Materials Science

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Studies on silicon quantum dots prepared at different working pressure

Cited by 15 publications

References 45 publications

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Advanced Catalysts for Photoelectrochemical Water Splitting

2D Nanomaterial Photoelectrodes for Photoelectrochemical Degradation of Pollutants and Hydrogen Generation

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Studies on silicon quantum dots prepared at different working pressure

Cited by 15 publications

References 45 publications

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se85Te3Bi12 nano-thin films

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se85Te3Bi12 nano-thin films

Advanced Catalysts for Photoelectrochemical Water Splitting

2D Nanomaterial Photoelectrodes for Photoelectrochemical Degradation of Pollutants and Hydrogen Generation

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Product

Resources

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Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films