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Nanowires (NW) based light emitting diodes (LEDs) have drawn large interest due to many advantages compared to thin film devices. Marked improved performances are expected from nanostructured active layers for light emission. Nanowires can act as direct waveguides and favor light extraction without use of lens and reflectors. Moreover, the use of wires avoids the presence of grain boundaries and then...
Zinc oxide (ZnO) nanowires were deposited on a plane conductive surface. They were vertically aligned, with 3 μ and 140 nm respectively for the length and the diameter, and with an array density of 10 nanowires/μm2. A field emission study by scanning anode field emission microscopy was performed to evaluate the field emission properties. The effective work function is about 1 eV, the threshold of...
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