Light Emission Study of Free-Standing Quasi-2D-γ-Alumina Grown by Graphene-Assisted Atomic Layer Deposition

Kheirandish, Elaheh; Kouklin, N.

doi:10.1007/s11664-020-08623-8

Cited by 1 publication

(2 citation statements)

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“…Unlike to the NIR band, the temperature-intensity decay of the visible band is found to be Figure 9. Schematic of electronic excitation-emission pathways for 2D-Ti:γ-alumina, after [35] as well as PL and PLE data discussed in the text.…”

Section: Sl-based Ti-doping Of 2d γ-Alumina By Aldmentioning

confidence: 99%

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Fabrication and Light‐Emission Study of Ti‐δ‐Doped Quasi‐2D γ‐Alumina by Graphene‐Assisted Atomic Layer Deposition

2023

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Crystalline quasi‐2D Ti‐δ‐doped γ‐alumina (2D‐Ti:γ‐alumina) is synthesized by a facile, precursor‐alternating atomic‐layer‐deposition technique followed by a post‐growth air‐anneal at ≈800 °C. According to energy‐dispersive X‐ray spectroscopy maps, Ti atomic concentration remains uniform and approaches ≈1.5%. Subject to several UV‐light exposures, the samples are found to develop a full strength, stable emission in the ultrawide spectral range of ≈350–850 nm. The near‐infrared (NIR) emission band centered at ≈760 nm is assigned to Ti deep defect states introduced in the alumina host. According to photoluminescence excitation–emission studies, aggregate oxygen vacancies remain a primary excitation source of the NIR emission. In addition, a broad visible‐range emission band at ≈525 nm is registered in the temperature range of ≈108–348 K, but unlike the NIR band, its temperature dependence remains Arrhenius with the non‐radiative recombination activation energy of ≈73 ± 9 meV. The resultant 2D‐Ti:γ‐alumina holds promise for applications in low‐cost alumina‐based optoelectronics, photocatalytic remediation, and spectrally wide light sources.

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Section: Sl-based Ti-doping Of 2d γ-Alumina By Aldmentioning

confidence: 99%

“…Schematic of electronic excitation–emission pathways for 2D‐Ti: γ ‐alumina, after [ 35 ] as well as PL and PLE data discussed in the text.…”

Section: Sl‐based Ti‐doping Of 2d γ‐Alumina By Aldmentioning

confidence: 99%

Fabrication and Light‐Emission Study of Ti‐δ‐Doped Quasi‐2D γ‐Alumina by Graphene‐Assisted Atomic Layer Deposition

2023

View full text Add to dashboard Cite

show abstract

Light Emission Study of Free-Standing Quasi-2D-γ-Alumina Grown by Graphene-Assisted Atomic Layer Deposition

Cited by 1 publication

References 44 publications

Fabrication and Light‐Emission Study of Ti‐δ‐Doped Quasi‐2D γ‐Alumina by Graphene‐Assisted Atomic Layer Deposition

Fabrication and Light‐Emission Study of Ti‐δ‐Doped Quasi‐2D γ‐Alumina by Graphene‐Assisted Atomic Layer Deposition

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