Luminescence properties of Eu2O3-doped ZrO2–Y2O3 single crystals. Issue 43 (21st October 2022)

• Record Type: Journal Article
• Authors: Ta, Shengdi; Zhang, Huiting; Wu, Wenxia; Wang, Yazhao; Zhang, Peng; Cheng, Zeyu; Xu, Shoulei; Goodman, Bernard Albert; Deng, Wen
• Is Part Of: CrystEngComm. Volume 24:Issue 43(2022)
• Page Start: 7669
• Page End: 7676
• Publication Date: 2022-10-21
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d2ce01054b
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : The optical properties of the Eu 3+ -doped Y2 O3 -stabilized ZrO2 crystals demonstrate potential for various applications based on their intense emission of orange light. Abstract : The synthesis, structure, and optical properties are reported for a series of yttria-stabilized zirconia crystals in which some Y 3+ was replaced by Eu 3+ . These crystals were grown by the optical floating zone (OFZ) method and were transparent without inclusions, cracks, or bubbles. They were all exclusively in the cubic phase, whereas the corresponding ceramic samples had a mixture of monoclinic and cubic phases. Absorption spectra showed a charge transfer band at 268 nm and a series of narrow peaks in the range 308–540 nm from Eu 3+ f–f transitions. The crystals were efficiently excited at 393 nm, and exhibited excellent orange-red photoluminescence (PL) centred at 610 nm, from the 5 D0 → 7 F1 transition. The maximum PL intensity was observed with crystals prepared with 2.00 mol% Eu2 O3, and compared with other rare earth ions; Eu 3+ -doped ZrO2 –Y2 O3 single crystals have a high concentration quenching threshold. The critical distance for Eu 3+ ions was calculated as 11.8 Å, which indicates that multipole–multipole interactions dominate the non-radiative energy transfer between Eu 3+ ions. Finally, the chromaticity coordinates (CIE) for all the samples were similar, and those for the (ZrO2 )92 (Y2 O3 )6 (Eu2 O3 )2 crystal were ( x = 0.6339, y = 0.3657) with a colour purity >98%.