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A novel morphology of gallium nitride (GaN) hexagonal micro-bricks has been synthesized at 1250°C by chemical vapor deposition (CVD) method. Photoluminescence (PL) and hydrogen storage capabilities of hexagonal micro-bricks have been investigated. The PL spectrum exhibits strong near-band-edge emission at 369nm (3.36eV). Defect related broad yellow band emission at 556nm (2.23eV) has also been observed,...
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