Quantum Confined Atoms of Doped ZnO Nanocrystals

Bhargava, R. N.; Chhabra, V.; Som, T.; Ekimov, A. I.; Taskar, N. R.

doi:10.1002/1521-3951(200201)229:2<897::aid-pssb897>3.0.co;2-c

Cited by 59 publications

(27 citation statements)

References 14 publications

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“…It is well-known that the Eu 2+ ions in crystal give a broad emission band in the same wavelength range due to the f-d transition. 13 However, here we used Eu 3+ solution for treatment, and the presence of Eu 2+ is excluded. Therefore, it is believed that the broad visible band emission after Eu 3+ treatment is purely ascribed to the deep level defect states in ZnO NWs.…”

Section: Resultsmentioning

confidence: 99%

Surface Eu-Treated ZnO Nanowires with Efficient Red Emission

et al. 2010

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The structural and optical properties of post surface Eu-treated ZnO nanowires (NWs) have been investigated systematically. It is found that the Eu 3+ ions are in the Eu 2 O 3 -like state located at the surface of ZnO NWs. Sharp intense red emissions in the range of 580-650 nm due to the intra-4f transition of Eu 3+ ions are observed from the sample. The temperature-dependent photoluminescence (PL) measurement shows that the intensity of the Eu 3+ ions emission is related to the near-band-edge (NBE) emission of ZnO NWs, indicating direct energy transfer from ZnO to Eu 3+ ions. Finally, the time-resolved PL measurement was carried out, and the roles played by the Eu 2 O 3 -like layers are discussed in detail. It is found that the Eu 2 O 3 layers not only suppress the deep level emission (DLE) in ZnO NWs but also provide efficient energy trap centers supporting the direct energy transfer from ZnO to Eu 3+ ions.

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Section: Resultsmentioning

confidence: 99%

Surface Eu-Treated ZnO Nanowires with Efficient Red Emission

et al. 2010

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“…These Mn dopants are electrically activated by participating the above electron and photon transports in the tetratubes. As investigated by Bhargava et al 41 and Norberg et al, 38 the transition threshold of the metal-to-ligand charge transfer ͑MLCT͒ lies below the Mn 2+ 4 T 1 ͑G͒ state in ZnO. This low MLCT level would provide a pathway for nonradiative decay of the excited Mn 2+ ions.…”

Section: B Optical Propertiesmentioning

confidence: 90%

Manganese-doped zinc oxide tetratubes and their photoluminescent properties

Sun

Dong

et al. 2005

Journal of Applied Physics

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“…Simple Eu 2+ ‐doped nanooxides include ZnO, SnO 2 , TiO 2 , and Gd 2 O 3 , and have emission wavelengths spanning from blue to the orange region (≈430–590 nm); however, these phosphors lack crystallographically appropriate cation sites into which Eu 2+ may be doped.…”

Section: Nanophosphors For Microledsmentioning

confidence: 99%

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

Zhou

Leaño

Liu³

et al. 2018

Small

145

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Half a century after its initial emergence, lanthanide photonics is facing a profound remodeling induced by the upsurge of nanomaterials. Lanthanide-doped nanomaterials hold promise for bioapplications and photonic devices because they ally the unmatched advantages of lanthanide photophysical properties with those arising from large surface-to-volume ratios and quantum confinement that are typical of nanoobjects. Cutting-edge technologies and devices have recently arisen from this association and are in turn promoting nanophotonic materials as essential tools for a deeper understanding of biological mechanisms and related medical diagnosis and therapy, and as crucial building blocks for next-generation photonic devices. Here, the recent progress in the development of nanomaterials, nanotechnologies, and nanodevices for clinical uses and commercial exploitation is reviewed. The candidate nanomaterials with mature synthesis protocols and compelling optical uniqueness are surveyed. The specific fields that are directly driven by lanthanide doped nanomaterials are emphasized, spanning from in vivo imaging and theranostics, micro-/nanoscopic techniques, point-of-care medical testing, forensic fingerprints detection, to micro-LED devices.

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Quantum Confined Atoms of Doped ZnO Nanocrystals

Cited by 59 publications

References 14 publications

Surface Eu-Treated ZnO Nanowires with Efficient Red Emission

Surface Eu-Treated ZnO Nanowires with Efficient Red Emission

Manganese-doped zinc oxide tetratubes and their photoluminescent properties

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

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