Photoluminescence enhancement in Na3SO4Cl:X (X = Ce3+, Eu3+ or Dy3+) material |
| |
Authors: | Nita Shinde N S Dhoble S C Gedam S J Dhoble |
| |
Institution: | 1. Department of Physics, RTM Nagpur University, Nagpur, India;2. Department of Chemistry, Sevadal Mahila Mahavidyalaya, Nagpur, India;3. Department of Physics, KZS Science College, Kalmeshwar, Nagpur, India |
| |
Abstract: | The compound Na3SO4Cl X (X = Ce3+, Eu3+ or Dy3+) prepared by the wet chemical method was studied for its photoluminescence (PL) and energy transfer characteristics. The PL from Na3SO4Cl:Ce3+ shows strong emission at 322 nm at an excitation of 272 nm. Therefore, an efficient Ce3+ → Dy3+, Eu2+ → Dy3+ and Eu2+ → Eu3+ energy transfer had taken place in this host. The Dy3+ emission caused by Ce3+ → Dy3+ energy transfer under ultraviolet (UV) wavelengths peaked at around 477 nm and 572 nm due to 4 F9/2 → 6H15/2 and 6H13/2 transitions with yellow–orange emission in the Na3SO4Cl lattice. An intense Dy3+ emission was observed at 482 and 576 nm caused by the Eu2+ → Dy3+ energy transfer process and due to 4 F9/2 → 6H15/2 and 4 F9/2 → 6H13/2 transitions respectively. The Eu3+ blue to red light emission caused by the Eu2+ → Eu3+ energy transfer peaked at 593 nm and 617 nm due to 5D0 → 5D3 transitions. The presence of trivalent Eu in Na3SO4Cl suggested the presence of Eu3+ in the host compound that occupied two different lattice sites and that peaked at 593 and 617 nm due to 5D0 → 7 F1 and 5D0 → 7 F2 transitions respectively. The trivalent europium ion is very useful for studying the nature of metal coordination in various systems due to its non‐degenerate emitting 5D0 state. The present paper discusses the photoluminescence characteristics of Eu2+ → Dy3+ and Eu2+ → Eu3+ energy transfer. This compound may be useful as a lamp phosphor. Copyright © 2015 John Wiley & Sons, Ltd. |
| |
Keywords: | photoluminescence wet chemical method optical material lamp phosphor rare earths |
|
|