Structural, optical and Urbach energy properties of ITO/CdS and ITO/ZnO/CdS bi-layer thin films

Nagaraja, M.; Raghu, P.; Mahesh, H.M.; Pattar, Jayadev

doi:10.1007/s10854-021-05568-4

Cited by 15 publications

(4 citation statements)

References 26 publications

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“…Nanocomposite materials typically show Urbach energy in the forbidden gap due to disordered atoms in the amorphous phase. The spread of energy bands lessens the material's optical bandwidth [ 49 ]. The development of the absorption edge at the bandgap energy is caused by either electron-phonon interaction or exciton-phonon interaction [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

MoS2 nanoflower decorated bio-derived chitosan nanocomposites for sustainable energy storage: Structural, optical and electrochemical studies

Islam,

Homaira,

Mahmud

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

MoS2 nanoflower decorated bio-derived chitosan nanocomposites for sustainable energy storage: Structural, optical and electrochemical studies

Islam,

Homaira,

Mahmud

et al. 2024

Heliyon

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“…Urbach energy is managed by structural disorders, possible imperfections and passivation at the surface. The equation relating absorption coefficient and Urbach energy (E u ) to each other is given below as [30]…”

Section: Using Below-given Tauc Relation [27]mentioning

confidence: 99%

Growth and temperature tuned band gap characteristics of NaBi(MoO₄)₂ single crystal

Isik¹,

güler²,

Gasanly³

2023

Phys. Scr.

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Structural and optical properties of double sodium–bismuth molybdate NaBi(MoO4)2 semiconductor compound was investigated by X-ray diffraction, Raman and transmission experiments. From the X-ray diffraction experiments, the crystal that has tetragonal structure was obtained. Vibrational modes of the crystal were found from the Raman experiments. Transmission experiments were performed in the temperature range of 10-300 K. Derivative spectroscopy analysis and absorption spectrum analysis were performed to get information about the change in band gap energy of the crystal with temperature. It was observed that the band gap energies of the crystal at different temperatures obtained from these techniques are well consisted with each other. By the help of absorption spectrum which was obtained from transmission measurements performed at varying temperatures, absolute zero value of the band gap and average phonon energy as 3.03 ± 0.02 eV and 〈E_ph 〉 = 24 ± 0.2 meV, respectively. Moreover, based on absorption spectrum analysis the Urbach energy of the crystal was obtained as 0.10 eV.

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“…More and more attention has been paid to the research on it [2]. Various efficient CdS-based photocatalysts were developed, such as TiO2/CdS [3], MoS2/CdS [4], ZnO/CdS [5], etc. SrWO4 possesses narrow band gap and superior photoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of CdS/SrWO4 nanoparticles on nano-cellulose and their application in the photocatalytic H2 generation

Li,

Wu,

Zheng

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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Nano-photocatalytic suspension systems have been a research hotspot. However, we found that there existed a problem of insufficient light penetration distance in this system. In this paper, we explored immobilization of CdS/SrWO4 nanoparticles on nano-cellulose to prepare a photocatalyst which can float on water and be easily separated. Next, its application in the photocatalytic H2 generation was studied deeply. From the results above, we can conclude that the as-prepared sample possesses satisfactory photocatalytic activity for H2 evolution. In addition, the process of separating the photocatalyst from the reaction system and converting into a high quality catalyst film on a solid substrate is easy. This indicates that our immobilization technique is promising and may be extended to the immobilization of other catalytic systems.

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Structural, optical and Urbach energy properties of ITO/CdS and ITO/ZnO/CdS bi-layer thin films

Cited by 15 publications

References 26 publications

MoS2 nanoflower decorated bio-derived chitosan nanocomposites for sustainable energy storage: Structural, optical and electrochemical studies

MoS2 nanoflower decorated bio-derived chitosan nanocomposites for sustainable energy storage: Structural, optical and electrochemical studies

Growth and temperature tuned band gap characteristics of NaBi(MoO₄)₂ single crystal

Immobilization of CdS/SrWO4 nanoparticles on nano-cellulose and their application in the photocatalytic H2 generation

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Structural, optical and Urbach energy properties of ITO/CdS and ITO/ZnO/CdS bi-layer thin films

Cited by 15 publications

References 26 publications

MoS2 nanoflower decorated bio-derived chitosan nanocomposites for sustainable energy storage: Structural, optical and electrochemical studies

MoS2 nanoflower decorated bio-derived chitosan nanocomposites for sustainable energy storage: Structural, optical and electrochemical studies

Growth and temperature tuned band gap characteristics of NaBi(MoO4)2 single crystal

Immobilization of CdS/SrWO4 nanoparticles on nano-cellulose and their application in the photocatalytic H2 generation

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Growth and temperature tuned band gap characteristics of NaBi(MoO₄)₂ single crystal