Luminescence properties of CaWO4 and CaWO4:Eu3+ nanostructures prepared at low temperature
Autor: | Mehri Fadavi, Ying Zhang, Tigran V. Shahbazyan, Ezat Heydari, Aman Abraha, Rong Zhang, Qilin Dai |
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Rok vydání: | 2018 |
Předmět: |
Materials science
Nanostructure Organic Chemistry Doping Nanowire Nanoparticle Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 7. Clean energy 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Inorganic Chemistry Nanocrystal Chemical engineering Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Luminescence Spectroscopy |
Zdroj: | Optical Materials. 84:115-122 |
ISSN: | 0925-3467 |
Popis: | The synthesis of luminescence nanostructures is always related with complicated procedures, and it is still challenging to control their luminescence properties by a facile method. In this work, CaWO4:Eu3+ nanostructures with different morphology, structures and sizes were prepared at low temperatures (2 °C), and the luminescence properties of the prepared nanostructures were studied. The nanostructure growth can be controlled by pH values of the precursor, reaction temperatures and Eu3+ doping concentrations. Low temperature (2 °C) synthesis is believed to control the nanocrystal growth easily due to slow growth process caused by the low temperature. The pH values of the precursor have a significant impact on the structure of CaWO4, leading to the formation of self-assembled microstructures and isolated nanoparticles. CaWO4:Eu3+ nanowires were produced as the Eu3+ doping concentration is 10%. The luminescence properties show that the reaction temperatures and pH values play an important role in the luminescence of CaWO4 host and the energy transfer from the host to Eu3+ leading to the tunable luminescence color from CaWO4:Eu3+. The method developed in this paper is believed to be beneficial for large-scale synthesis of luminescence nanostructures toward white light emitting diode phosphors. |
Databáze: | OpenAIRE |
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