Improvement in upconversion/downshifting luminescence of Gd2O3 :Ho3+/Yb3+ phosphor through Ca2+/Zn2+ incorporation and optical thermometry studies

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Kumar, A (Author) Other; Joaquim C G E Esteves da Silva (Author) FCUP; Kumar, K (Author) Other; Swart, HC (Author) Other; Maurya, SK (Author) Other; Kumar, P (Author) Other; Tiwari, SP (Author) Other

Journal

Title: Materials Research Bulletin

Vol. 112

Pages: 28-37

ISSN: 0025-5408

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 33 Citations

Other information

Authenticus ID: P-00P-WHZ

DOI: 10.1016/j.materresbull.2018.11.031

Abstract (EN): The Ho3+/Yb3+ doped Gd2O3 phosphor was synthesized via the hydrothermal process. Co-doping of Ca2+ and Zn2+ ions caused a change in the particle morphology and aggregation of the Ho3+/Yb3+: Gd2O3 phosphor. The structural characterization of these particles was performed using X-ray diffraction analysis, Fourier transforms infrared spectroscopy and scanning electron microscopy. The 980 nm excitation assisted upconversion luminescence and 449 run excitation assisted downshifting luminescence of these phosphor particles were compared through the incorporation of Ca2+ and Zn2+ co-dopants. The co-dopants concentration was varied at 0, 5, 10, 15 and 20 mol %. The change in upconversion/downshifting luminescence under the influence of the optimized molar concentration of these co-dopants was studied and explained based on structural variations in the present phosphor material. The paramagnetic behavior of these particles was characterized and compared to search possible applications of these particles in the biomedical field. The samples were studied comparatively for temperature sensing.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10