Optical, electronic, and microstructural properties of mixed phase RF magnetron sputtered vanadium oxide thin films on quartz and aluminized quartz

Hasan, Mohammed Adnan; Chavan, S.; Dalal, Avijit; Rajendra, A.; Mondal, Aniruddha; Sherikar, Baburao N.; Dey, Arjun

doi:10.1002/sia.6985

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…This suggested that the thin-film V 2 O 5 cathodes formed by the PVD process are amorphous, regardless of the Ar pressure used. 22,25 Raman spectroscopy data further verified that no crystalline phases were present in H-V 2 O 5−x and L-V 2 O 5−x , confirming the XRD results (Figure S3b). Based on prior literature, we expect that the lack of crystalline phases in H-V 2 O 5−x and L-V 2 O 5−x would assist the Zn 2+ ion diffusion.…”

Section: Resultssupporting

confidence: 77%

“…Interestingly, X-ray diffraction (XRD) patterns of H-V 2 O 5– x and L-V 2 O 5– x showed no V 2 O 5 -related peaks, but only a peak related to the SS substrate (Figure g). This suggested that the thin-film V 2 O 5 cathodes formed by the PVD process are amorphous, regardless of the Ar pressure used. , Raman spectroscopy data further verified that no crystalline phases were present in H-V 2 O 5– x and L-V 2 O 5– x , confirming the XRD results (Figure S3b). Based on prior literature, we expect that the lack of crystalline phases in H-V 2 O 5– x and L-V 2 O 5– x would assist the Zn 2+ ion diffusion. , To investigate the elemental valence states of H-V 2 O 5– x and L-V 2 O 5– x , X-ray photoelectron spectroscopy (XPS) analysis was performed.…”

Section: Resultssupporting

confidence: 72%

See 1 more Smart Citation

Oxygen-Related Defect Engineering of Amorphous Vanadium Pentoxide Cathode for Achieving High-Performance Thin-Film Aqueous Zinc-Ion Batteries

Cho

Park

Kim

et al. 2023

ACS Appl. Energy Mater.

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Thin-film aqueous zinc-ion batteries are expected to serve as next-generation energy storage devices that are both lowcost and safe. However, to realize practical energy storage devices based on zinc-ion batteries, it is necessary to develop reliable, highcapacity cathode materials. In this study, we prepared a V 2 O 5based thin-film electrode and investigated the effect of varying the Ar pressure during radio frequency magnetron sputtering of V 2 O 5 , a representative cathode material in thin-film zinc-ion batteries, to control the number of oxygen vacancies in the oxide lattice. The optimized V 2 O 5 thin-film electrode exhibited enhanced electrochemical activities, low degree of polarization, improved ion diffusion, and increased electrical conductivities. Specifically, an oxygen-deficient V 2 O 5−x thin-film prepared by sputtering under high pressure exhibited a high rate capability (57.2 mAh g −1 at 20 C) and superior electrochemical performance (105.2 mAh g −1 for up to 1000 cycles at a current density of 5 C). The mechanism for the performance enhancement was revealed by density functional theory calculations, which showed that the oxygen-deficient V 2 O 5−x had a lower Zn 2+ -ion diffusion energy barrier than that of pristine V 2 O 5 . This defect engineering strategy for tuning the oxidation state should aid in designing high-performance cathodes for advanced thin-film aqueous battery chemistry.

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Section: Resultssupporting

confidence: 77%

Section: Resultssupporting

confidence: 72%

Oxygen-Related Defect Engineering of Amorphous Vanadium Pentoxide Cathode for Achieving High-Performance Thin-Film Aqueous Zinc-Ion Batteries

Cho

Park

Kim

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…However, the existing literature reports the occurrence of SMT at different temperatures. Despite the diversity in thickness [32] and substrates investigated, there remains a lack of clear explanation or direct correlation [4,[6][7][8][9][11][12][13][14][15][16][17][18] which demands the examination of factors influencing the SMT in V 2 O 5 . This includes understanding the SMT in different forms of vanadium oxide, such as crystalline, multilayered, doped, and composite materials.…”

Section: Introductionmentioning

confidence: 99%

Demystifying the Semiconductor‐to‐Metal Transition in Amorphous Vanadium Pentoxide: The Role of Substrate/Thin Film Interfaces

Esther,

Muralikrishna,

Chirumamilla

et al. 2024

Adv Funct Materials

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The precise mechanism governing the reversible semiconductor‐to‐metal transition (SMT) in V2O5 remains elusive, yet its investigation is of paramount importance due to the remarkable potential of V2O5 as a versatile “smart” material in advancing optoelectronics, plasmonics, and photonics. In this study, distinctive experimental insights into the SMT occurring in amorphous V2O5 through the application of highly sensitive, temperature‐dependent, in situ analyses on a V2O5 thin film deposited on soda‐lime glass are presented. The ellipsometry measurements reveal that the complete SMT occurs at ≈340 °C. Remarkably, the refractive index and extinction coefficients exhibit reversible characteristics across visible and near‐infrared wavelengths, underscoring the switch‐like behavior inherent to V2O5. The findings obtained from ellipsometry are substantiated by calorimetry and in situ secondary ion mass spectrometry analyses. In situ electron microscopy observations unveil a separation of oxidation states within V2O5 at 320 °C, despite the thin film retaining its amorphous state. The comprehensive experimental investigations effectively demonstrate that alterations in electronic state can trigger the SMT in amorphous V2O5. It is revealed for the first time that the SMT in V2O5 is solely contingent upon electronic state changes, independent of structural transitions, and importantly, it is a reversible transformation within the amorphous state itself.

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Electronic, nanomechanical and smart reversible phase transition behaviours of sputtered titanium oxide-vanadium oxide composite thin films

Hasan

Gupta

Bera

et al. 2022

Ceramics International

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Optical, electronic, and microstructural properties of mixed phase RF magnetron sputtered vanadium oxide thin films on quartz and aluminized quartz

Abstract: Optical, electronic, and microstructural properties of mixed phase RF magnetron sputtered vanadium oxide thin films on quartz and aluminized quartz.

Cited by 3 publications

References 35 publications

Oxygen-Related Defect Engineering of Amorphous Vanadium Pentoxide Cathode for Achieving High-Performance Thin-Film Aqueous Zinc-Ion Batteries

Oxygen-Related Defect Engineering of Amorphous Vanadium Pentoxide Cathode for Achieving High-Performance Thin-Film Aqueous Zinc-Ion Batteries

Demystifying the Semiconductor‐to‐Metal Transition in Amorphous Vanadium Pentoxide: The Role of Substrate/Thin Film Interfaces

Electronic, nanomechanical and smart reversible phase transition behaviours of sputtered titanium oxide-vanadium oxide composite thin films

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