TiO2 Induced Morphology Variation and the Optical Property of Mg2TiO4:Mn4+ Nanophosphor for Warm White LED
Mn4+ doped Mg2TiO4 based deep-red nanophosphors with strong absorption in the blue region were synthesized, matching with the blue chips and showing strong deep red emission with an abnormal broad band centered at 660 nm. They were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL). The possible luminous mechanism of Mn4+ ion is analyzed by the simple energy level diagram of Mn4+ ion. Through using different morphology of TiO2, specific morphology of Mg2TiO4:Mn4+ were obtained and the emission intensity of Mg2TiO4:0.1%Mn4+ nanophosphor can be enhanced by use TiO2 tubes and nanospheres compared to bulk TiO2 as raw materials. The red phosphors with a broad emission band in the pure red light region show a promising application in blue LEDs as a red component.
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Document Type: Short Communication
Publication date: March 1, 2017
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- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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