Luminescence properties of the (A2B2O7) type Eu1.90Dy0.10Ge2O7

4^th International Conference and Exhibition on Materials Science & Engineering

September 14-16, 2015 Orlando, USA

Esra ��zt�¼rk and Erkul Karacaoglu

Karamanoglu Mehmetbey University, Turkey

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

Germanates constitute a group of ternary oxides with several properties of interest in the fields of sensing, optical and electrooptical applications and others. The Eu2-xDyxGe2O7 (x: 0.10) was synthesized via high temperature solid state reaction method under open atmosphere. The reaction conditions and phase forming process were investigated by thermo gravimetry and differential thermal analysis (TG/DTA). The x-ray diffraction (XRD) analysis was carried out to get phase properties of the powder sample. The luminescence properties of the Eu1.90Dy0.10Ge2O7 phosphor were determined by a photoluminescence spectrometer (Figure 1) under room temperature. The photoluminescence (PL) results showed that the excitation under ultraviolet region (395 nm) gave different intense emissions in the red region. The emission bands at 589, 611, 645 and 697 nm concern the typical 5D0 � 7F1, 5D0 � 7F2, 5D0 � 7F3 and 5D0 � 7F4 transitions of the Eu3+ ions, respectively. The most intense emission peak, 611 nm, belongs to red region transition of Eu 3+ ions. Figure 1. The excitation and emission spectrum of Eu1.90Dy0.10Ge2O7 phosphor

Biography :

Esra Öztürk has completed her PhD from Erciyes University. She is currently working in the Department of Materials Science and Engineering at Karamanoglu Mehmetbey University. Her research areas are inorganic solid state materials, luminescent materials and piezoelectric smart materials. She has published 20 papers in reputed journals. This work was supported by HYPERLINK "http://www.tubitak.gov.tr/en" \o "Home" The Scientific and Technological Research Council of Turkey (TUBITAK) under project number 114Z438.

Email: esracircir@gmail.com