An upconversion luminescence and temperature sensor based on Yb3+/Er3+ co-doped GdSr2AlO5. Issue 17 (5th March 2018)

• Record Type: Journal Article
• Authors: Zhang, Gangyi; Qiang, Qinping; Du, Shanshan; Wang, Yuhua
• Is Part Of: RSC advances. Volume 8:Issue 17(2018)
• Page Start: 9512
• Page End: 9518
• Publication Date: 2018-03-05
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra13759a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : GdSr2 AlO5 :Yb 3+ /Er 3+ micro-particles were synthesized by a simple solid state method. Abstract : GdSr2 AlO5 :Yb 3+ /Er 3+ micro-particles were synthesized by a simple solid state method. The structure, morphology, size and upconversion luminescence features have been characterized. These results indicated that GdSr2 AlO5 has a contracted tetragonal cell and has irregular block shaped particles with sizes of about 5 μm. During upconversion, green ( 2 H11/2, 4 S3/2 → 4 I15/2 ) (527 nm, 549 nm) and red ( 4 F9/2 → 4 I15/2 ) (665 nm) emissions had been observed, both of which occurred via a two-photon population process. In addition, green UC emission characteristics were studied, and it was found that its temperature ranged from 293 K to 473 K and the sensitivity was 0.0054 K −1 at 473 K. This indicated that GdSr2 AlO5 :Yb 3+ /Er 3+ micro-particles may have potential application in high temperature environments for safety signs.