Enhanced green upconversion luminescence in ZnO:Er3+, Yb3+ on Mo6+ co-doping for temperature sensor application. (19th December 2017)

• Record Type: Journal Article
• Authors: Anjana, Radhakrishnan; Subha, Perumpallikkattil P; Kurias, Markose K; Jayaraj, Madambi K
• Is Part Of: Methods and applications in fluorescence. Volume 6:Number 1(2018:Mar.)
• Publication Date: 2017-12-19
• Subjects: ZnO -- upconversion -- molybdenum -- temperature sensor; Fluorescence spectroscopy -- Periodicals; Fluorescence -- Periodicals; Spectrometry, Fluorescence -- Periodicals; Fluorescence -- Periodicals; Fluorescence; Fluorescence spectroscopy; Periodicals; 535.352
• DOI: 10.1088/2050-6120/aa9c13
• Languages: English
• ISSNs: 2050-6120

Abstract

Abstract: Erbium (Er) doped zinc oxide (ZnO) powder was prepared using co-precipitation method. Effect of ytterbium (Yb) and molybdenum (Mo) co-doping on upconversion emission was studied. The emission intensity has been enhanced on Yb co-doping due to energy transfer from Yb to Er. Co-doping Mo in ZnO:Er, Yb has brought a significant enhancement in green upconversion emission, when excited with 980 nm laser. The enhancement in green emission on Mo doping is because of the formation of Yb 3 + – MoO 4 2 − dimer. Since ZnO is a material having high thermal stability, the enhanced green emission in Mo, Er, Yb doped ZnO can be used for temperature sensor applications. The variation in relative intensity ratio of 2 H11/2 → 4 I15/2, 4 S3/2 → 4 I15/2 transition can be used to sense the sample temperature.