Broad-scope dual-mode modulation thermometry based on up-conversion phosphor GaNbO4: Yb3+/Er3+. Issue 8 (15th April 2023)

• Record Type: Journal Article
• Authors: Liu, Ronghui; Lei, Zonghao; Sun, Ruyi; Su, Shikun; Zou, Yanfei; Sun, Lijie; Lu, Jingyao; Hu, Chen; Teng, Bing; Sun, Shijia; Zhong, Degao
• Is Part Of: Ceramics international. Volume 49:Issue 8(2023)
• Page Start: 11829
• Page End: 11836
• Publication Date: 2023-04-15
• Subjects: Up-conversion -- Wide range -- High sensitivity -- Dual-mode optical thermometry; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.12.029
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Fluorescence temperature measurement technology has set off another upsurge in non-contact temperature measurement, but still suffers from the large error for single-mode thermometry. Herein, in a broad temperature range of 93–633 K, a dual-mode modulation thermometry based on up-conversion phosphor of GaNbO4 :Yb 3+ /Er 3+ is realized with the maximum relative sensitivity ( S r ) of 11.7% K −1 (93 K) and 13.1% K −1 (123 K), respectively. GaNbO4 :Yb 3+ /Er 3+ phosphors were synthesized by high temperature solid-state method. The structure, surface morphology and the optical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL). The fluorescence intensity ratio (FIR) readout method based on Er 3+ thermal-coupled energy level (TCL) and non-thermal-coupled energy level (NTCL) was used to achieve the dual-mode temperature measurement with high temperature resolution and good repeatability in GaNbO4 :5 mol% Yb 3+ and 5 mol% Er 3+ phosphors. All the results show that GaNbO4 :Yb 3+ /Er 3+ phosphors have great application potential in high sensitivity broadband thermometry.