Improved steady-state photoluminescence derived from the compensation of the charge-imbalance in Ca3Mg3(PO4)4:Eu3+ phosphor. Issue 17 (1st December 2019)

• Record Type: Journal Article
• Authors: Nair, Govind B.; Kumar, Ashwini; Swart, H.C.; Dhoble, S.J.
• Is Part Of: Ceramics international. Volume 45:Issue 17(2019)Part A
• Page Start: 21709
• Page End: 21715
• Publication Date: 2019-12-01
• Subjects: Charge-compensation -- Photoluminescence -- Phosphate -- Eu3+ -- Sol-gel; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.07.171
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: This work focuses on the charge-compensation effects produced by different monovalent alkali ions, viz. Li +, Na +, K +, and the vacancy defects in the Eu 3+ -activated Ca3 Mg3 (PO4 )4 host. To compensate the extra charge produced due to doping of Eu 3+ ions in the Ca 2+ site, two approaches were adopted. In the first approach, a Ca 2+ vacancy (□ + ) was deliberately created in such a way that three Ca 2+ ions were removed for doping of every two Eu 3+ ions. In the second case, a monovalent alkali ion (Li +, Na + or K + ) was incorporated along with one Eu 3+ ion to replace two Ca 2+ sites in the host. Sol-gel/Pechini method was employed for the synthesis. The luminescence emissions of Ca3 Mg3 (PO4 )4 ;Eu 3+ phosphor significantly improved with the introduction of charge-compensators. The remarkable enhancement in the emission intensity of the charge-compensated samples was accompanied by noteworthy improvement in the color purity of their emissions.