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Currently, the exploit of nanomaterials in the field of luminescence has been tremendously increased due to their unique properties. Rare-earth cations in different host lattices was prompted the development of rare- earth luminescent materials for lasers, lamps, CRTs, dosimeters, scintillators, display systems, sensors, memory devices, white light-emitting diodes (WLEDs) etc. Nanophosphors can be applied in various fields due to reduction of the particle size of the crystalline system which considerably alter its optical and electronic properties, large surface to volume ratio and quantum confinement effect.The unique spectroscopic properties of rare-earth ions in different host lattices were prompted the development of rare- earth luminescent materials for display and lighting applications. WLEDs were the potential materials for significantly improving lighting efficiency, resulting in reduction of the excitation energy and also reduction in pollution from fossil fuel power plants.
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