Ultraviolet light emitting diode based on ZnO nanowires

Hui, Sheng; Zhang, Qifeng; Jin-Lei, Wu

doi:10.7498/aps.56.3479

Cited by 14 publications

(3 citation statements)

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“…ZnO nanowires (NWs) have attracted considerable attention as a promising material with extensive application in ultraviolet (UV) light emitting devices, [1][2][3][4][5] biosensors, [6,7] and UV sensors. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Due to its exciton binding energy of 60 meV, wide band gap (3.37 eV), and large surface-to-volume ratio, ZnO NW is especially promising for optical applications, such as UV light detection.…”

Section: Introductionmentioning

confidence: 99%

Enhancing UV photosensitivity of a ZnO UV nanosensor using electrical stimulation at megahertz frequency

Li¹,

Zhu²

2013

Chinese Phys. B

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We report a novel technique to enhance the ultraviolet (UV) photosensitivity of a ZnO nanosensor with ZnO nanowires bridged on micromachined metallic electrodes. The experimental results reveal that the photoconductivity and the time response of the ZnO nanowire sensor with either Schottky or Ohmic contacts are significantly improved by electrifying the nanowire sensors using an alternating current at the frequency of megahertz. An integrated UV sensor incorporating ZnO nanowires with a constant current mode driving circuit is developed, which demonstrates promising sensitivity and time response to UV illumination with a low power consumption.

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Section: Introductionmentioning

confidence: 99%

Enhancing UV photosensitivity of a ZnO UV nanosensor using electrical stimulation at megahertz frequency

Li¹,

Zhu²

2013

Chinese Phys. B

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“…Owing to the applicability of the 1D nanoforms it is highly desirable to fabricate and characterize 1D nanoforms of technologically important materials such as zinc oxide (ZnO). 1D nanoforms of ZnO have various important applications, such as gas sensors [14,[25][26][27], UV light emitting diodes [2,19,28], field effect transistors [15,29] and lasers [7,8].…”

Section: Introductionmentioning

confidence: 99%

Direct synthesis of ZnO nanowire arrays on Zn foil by a simple thermal evaporation process

Ghoshal¹,

Biswas²,

Kar³

et al. 2008

Nanotechnology

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ZnO nanowire arrays were synthesized on zinc foil by a simple thermal evaporation process at relatively low temperature. Morphology and size controlled synthesis of the ZnO nanostructures was achieved by variation of the synthesis temperature, reaction time and the surface roughness of the substrate. A gas-solid and self-catalytic liquid-solid mechanism is proposed for the growth of nanowires at different temperatures. High-resolution transmission electron microscopy (HRTEM) showed that the as-grown nanowires were of single crystal hexagonal wurtzite structure, growing along the [101] direction. Photoluminescence exhibited strong UV emission at ∼382 nm and a broad green emission at ∼513 nm with 325 nm excitation. Raman spectroscopy revealed a phonon confinement effect when compared with results from bulk ZnO. The nanowire arrays also exhibited a field emission property.

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“…Zinc oxide is a remarkable wide band-gap semiconductor with diverse properties such as ultraviolet (UV) emission, [1,2] transparent conductivity, [3] and piezoelectricity. [4] One-dimensional (1D) ZnO nanocrystals exhibit the most abundant configurations of nanostructures, [5−7] and have a wide range of promising applications in UV photonic devices, [8] field emission devices, [9,10] sensors, [11] and piezoelectric nanogenerators.…”

Section: Introductionmentioning

confidence: 99%