Investigating photoluminescence properties of Eu3+ doped CaWO4 nanoparticles via Bi3+ amalgamation for w-LEDs application.
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| Title: | Investigating photoluminescence properties of Eu3+ doped CaWO |
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| Authors: | Singh, Maheshwary1 (AUTHOR), Haq, Waseem Ul1 (AUTHOR), Bishnoi, Swati2 (AUTHOR), Singh, Bheeshma Pratap3 (AUTHOR), Arya, Sandeep4 (AUTHOR) snp09arya@gmail.com, Khosla, Ajit5 (AUTHOR), Gupta, Vinay6 (AUTHOR) |
| Source: | Materials Technology. Aug2022, Vol. 37 Issue 9, p1051-1061. 11p. |
| Subjects: | Dipole-dipole interactions, Amalgamation, Energy transfer, Light emitting diodes, Scanning electron microscopy, Nanoparticles, Photoluminescence |
| Abstract: | Eu3+-doped CaWO4 nanophosphors were synthesised in series for different atomic wt% concentrations (0, 0.5, 1, 2, 5 and 10) of Bi3+ by polyol method. Their structure and morphology were characterised using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The photoluminescence properties and energy transfer from Bi3+ to Eu3+ in CaWO4:Eu3+/Bi3+ nanophosphors were also investigated. The results revealed that red luminescence of CaWO4:2Eu3+/1Bi3+ nanophosphor is 5.4 times stronger than CaWO4:2Eu3+. It was observed that the forces exist between Bi3+ and Eu3+ are due to the interaction of electric dipole-dipole interactions. The chroma of CaWO4:2Eu3+/1Bi3+ nanophosphors was calculated to be 97.40%. The energy transfer process was studied by measuring the decay curves due to Bi3+ and Eu3+ dopants. Enhanced red emission, high thermal stability, stronger 5D0 → 7F2 absorption intensity, high colour purity and decay studies indicate that CaWO4:Eu3+/Bi3+ nanophosphors are potential candidates to be used in white light-emitting diode (wLEDs). [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Eu3+-doped CaWO4 nanophosphors were synthesised in series for different atomic wt% concentrations (0, 0.5, 1, 2, 5 and 10) of Bi3+ by polyol method. Their structure and morphology were characterised using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The photoluminescence properties and energy transfer from Bi3+ to Eu3+ in CaWO4:Eu3+/Bi3+ nanophosphors were also investigated. The results revealed that red luminescence of CaWO4:2Eu3+/1Bi3+ nanophosphor is 5.4 times stronger than CaWO4:2Eu3+. It was observed that the forces exist between Bi3+ and Eu3+ are due to the interaction of electric dipole-dipole interactions. The chroma of CaWO4:2Eu3+/1Bi3+ nanophosphors was calculated to be 97.40%. The energy transfer process was studied by measuring the decay curves due to Bi3+ and Eu3+ dopants. Enhanced red emission, high thermal stability, stronger 5D0 → 7F2 absorption intensity, high colour purity and decay studies indicate that CaWO4:Eu3+/Bi3+ nanophosphors are potential candidates to be used in white light-emitting diode (wLEDs). [ABSTRACT FROM AUTHOR] |
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| ISSN: | 10667857 |
| DOI: | 10.1080/10667857.2021.1918866 |
