A latest-generation fluoride with excellent structural stiffness for ultra-efficient photoluminescence and specific four-peak emission temperature sensing

Abstract

LiYF4:Ln3+ exhibits multi-wavelength-excitation self-sensitization, ultra-efficient PL and specific four-peak emission temperature sensing, as confirmed from crystal structure, electronic band, morphological, and structural stiffness analysis.

Achieving ultrasensitive temperature sensing through non-thermally coupled energy levels to overcome energy gap constraints

“…Absolute sensitivity ( S A ) and relative sensitivity ( S R ) are the extremely important parameters for optical thermometers and can be expressed as follows 28–31 : S A = |d(FIR)/d T | = FIR·Δ E /( K · T 2 ), S R = |d(FIR)/(FIR)·d T | = Δ E /( K · T 2 ).…”

Upconversion luminescence and temperature sensing properties of Ho3+,Yb3+-codoped Bi2WO6

“…4. According to the literature, 12–14 phonons assist in energy transfer when the energy difference between the excited and ground-state electrons of the energy donor is different from that between the excited and ground-state electrons of the energy acceptor (energy mismatch). Under 980 nm excitation, Yb 3+ transitions from ground state 2 F 7/2 to excited state 2 F 5/2 .…”

White light-emitting ZnO:Dy3+ nanophosphors: delving into the spectroscopic parameters via Judd–Ofelt analysis

“…Total radiative transition probability A R is the sum of all electric and magnetic dipole transition probabilities.where J = 15/2, 13/2 and 11/2. 60 The radiative lifetime τ rad of the emitting state 4 F 9/2 is related to the spontaneous emission probabilities for all transitions from this state to the low-lying 6 H J states:…”