Green synthesis of white-light-emitting ZnSe:Eu2+, Mn2+ quantum dots in an aqueous solution
| Autor: | Liqin Qin, Ronghuan Qin, Pingfang Tao, Xingming Wei, Haichuang Liang, Rongfang Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Materials science Aqueous solution Dopant business.industry Mechanical Engineering Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Mechanics of Materials Transmission electron microscopy Quantum dot Optoelectronics General Materials Science Thioglycolic acid 0210 nano-technology Luminescence business Powder diffraction |
| Zdroj: | Journal of Materials Science. 52:6994-6998 |
| ISSN: | 1573-4803 0022-2461 |
| Popis: | High-quality ZnSe:Eu, Mn quantum dots (QDs) with white light emitting were synthesized via a green preparation method in an aqueous solution using thioglycolic acid as a stabilizing agent. The composition of the QDs could be flexibly controlled by varying the amount of Eu or Mn cation. The effects of reflux time and Eu2+ ion dopant concentration on the luminescence properties were systematically investigated. The obtained QDs were characterized by photoluminescence spectrometry, X-ray powder diffraction, and high-resolution transmission electron microscopy. The proposed method formed cubic ZnSe:Mn2+, Eu2+ QDs with the maximum emission peak at 460 and 580 nm. In the optimal condition, the quantum yields of ZnSe:Mn2+, Eu2+ QDs could reach 27.68%. The CIE color coordinates were (0.328, 0.334), which agreed with those of pure white light (0.33, 0.33). The results verified that the ZnSe:Mn2+, Eu2+ QDs exhibited potential in light-emitting diode applications. |
| Databáze: | OpenAIRE |
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