Luminescence and Energy Transfer between Ce³⁺ and Pr³⁺ in BaY₂Si₃O₁₀ under VUV–vis and X-ray Excitation

Abstract

A detailed investigation on photoluminescence properties and energy transfer (ET) dynamics of Ce, Pr-doped BaYSiO is provided along with the potential X-ray excited luminescence application. The luminescence properties of Pr are studied in VUV-UV-vis spectral range at low temperature, and the spectral profiles of PrP and D emission lines are determined using time-resolved emission spectra. Upon 230 nm excitation, the electron population from Pr 4f5d state to its 4f excited state is discussed in detail. As Pr concentration rises, PrP and D luminescence possess different concentration-related properties. The incorporation of Ce in the codoped sample produces the strong Ce luminescence under 230 nm excitation, which is the combined result of Pr 4f5d → Ce 5d ET and Ce intrinsic excitation. On the other hand, the increasingly strong ET of Ce 5d → Pr 4f results in the decrease of Ce emission intensity and the gradual deviation of Ce luminescence decay from the single exponential in the system. By employing the Inokuti-Hirayama model, the dipole-dipole interaction is confirmed as the predominant multipolar effect in controlling this ET process, and the value of C is determined to be 9.97 × 10 m·s. Finally, the relatively low scintillation light yield of Ce-doped BaYSiO material impedes its application potential in the scintillator field, and the cosubstitution of Pr results in the observable decline of scintillation performance.

High-Performance Pr3+-Doped Scandate Optical Thermometry: 200 K of Sensing Range with Relative Temperature Sensitivity above 2%·K–1

“…34 It suggests that at high temperatures, the number of excited Pr 3+ ions located at the 3 P 1 energy state would increase, and the radiationless energy transitions between 3 P 0,1 and 1 D 2 states also become pronounced. 17,37,38 The decay dynamics of Pr 3+ :CaSc 2 O 4 for different energy transitions is also investigated and analyzed. All the measured decay curves are fitted by the following two-exponential equation 17…”

Halide Perovskite, a Potential Scintillator for X‐Ray Detection

“…Generally, scintillator materials can be classified as intrinsic (luminescence centers are created by inherent defects in structural units or hosts) or extrinsic (doping appropriate ions to provide luminescence centers) systems, and the emission mechanisms is shown in Figure 1b. [ 64 ] Especially for the latter, when ions that allow radiation transition (such as Ce 3+ , Pr 3+ or Nd 3+ ) are used, [ 65–68 ] high‐quality scintillators can be produced, and efficient and rapid energy transfer from the host material can be achieved. Therefore, the material has a great influence on the performance of the scintillator.…”

Insights into the Microstructures and Energy Levels of Pr3+-Doped YAlO3 Scintillating Crystals

“…Among these RE ions, trivalent praseodymium (Pr 3+ ) possesses a unique 4f 2 configuration and plentiful energy levels, which allow the wavelengths of radiative emissions ranging from ultraviolet to near-infrared. The luminescence of Pr 3+ ions has been investigated for various applications, such as optical fiber communication, field emission devices, and scintillator applications. − When introduced as a dopant in host crystals, the Pr 3+ ion shows a strong red luminescence from the popular 1 D 2 to 3 H 4 transition . Yttrium orthoaluminate (YAlO 3 ) has prominent physical characteristics and good thermal stabilities, which makes it highly suitable for serving as a host for RE ions.…”