Abstract
Cost-effective white-light emitting highly-defective ZnO is synthesized by a sol–gel combustion method using urea and zinc salt at a low temperature. The obtained ZnO can be excited in a wide range of wavelength from 270 to 480nm. The excitation of ZnO by blue light emits a bright white-light which covers from blue to red wavelength region. The stable white-light emission is found to have originated from the defective structure of ZnO by the synthesis method. This could be highly useful for producing cost-effective white-light emitting diodes. The structural, morphological and optical properties of ZnO particle are analyzed by XRD, SEM, PL Spectra and DRS.
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