Multiple temperature effects on up-conversion fluorescences of Er3+-Y b3+-Mo6+ codoped TiO2 and high thermal sensitivity | Zendy

Baosheng Cao | Zendy; Jinlei Wu | Zendy; Wang Xiao-hua | Zendy; Yangyang He | Zendy; Zhiqing Feng | Zendy; Bin Dong | Zendy; L. Rino | Zendy

Open Access

Multiple temperature effects on up-conversion fluorescences of Er3+-Y b3+-Mo6+ codoped TiO2 and high thermal sensitivity

Author(s) -

Baosheng Cao,

Jinlei Wu,

Wang Xiao-hua,

Yangyang He,

Zhiqing Feng,

Bin Dong,

L. Rino

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4928683

Subject(s) - sensitivity (control systems) , phosphor , thermal , materials science , intensity (physics) , analytical chemistry (journal) , fluorescence , emission intensity , steady state (chemistry) , temperature measurement , optics , chemistry , optoelectronics , luminescence , thermodynamics , physics , electronic engineering , chromatography , engineering

We report multiple temperature effects on green and red up-conversion emissions in Er3+-Y b3+-Mo6+ codoped TiO2 phosphors. With increasing temperature, the decrease of the red emission from 4F9/2→4I15/2, the increase of green emission from 2H11/2→4I15/2 and another unchanged green emission from 4S3/2→4I15/2 were simultaneously observed, which are explained by steady-state rate equations analysis. Due to different evolution with temperature of the two green emissions, higher thermal sensitivity of optical thermal sensor was obtained based on the transitions with the largest fluorescence intensity ratio. Two parameters, maximum theoretical sensitivity (Smax) and optimum operating temperature (Tmax) are given to describe thermal sensing properties of the produced sensors. The intensity ratio and energy difference ΔE of a pair of energy levels are two main factors for the sensitivity and accuracy of sensors, which should be referred to design sensors with optimized sensing properties

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