DOI: 10.20350/digitalcsic/18118
title: Unraveling Thermal Interactions in Lanthanide-Doped Phosphors: A Frequency-Domain Analysis Approach [Dataset]

description: - Fig1b_emi.txt : PL spectra of SAO:Eu,Dy at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1b_exc.txt : Excitation spectra of SAO:Eu,Dy at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1c_emi.txt : PL spectra of GYAGG:Ce,Cr at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1c_exc.txt : Excitation spectra of GYAGG:Ce,Cr at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1d.txt : PL quenching curves of SAO:Eu,Dy: Temperature in K (column 1), intensity in detector counts for an excitation density of 4mW/cm2 (column 2), intensity in detector counts for an excitation density of 0.04mW/cm2 (column 3). - Fig1e.txt : PL quenching curves of GYAGG:Ce,Cr: Temperature in K (column 1), intensity in detector counts for an excitation density of 4mW/cm2 (column 2), intensity in detector counts for an excitation density of 0.04mW/cm2 (column 3). - Fig2a.txt : Real part of the transfer function (Hr) as a function of temperature for SAO:Eu,Dy: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig2b.txt : Imaginary part of the transfer function (Hi) as a function of temperature for SAO:Eu,Dy: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig2d.txt : Real part of the transfer function (Hr) as a function of temperature for GYAGG:Ce,Cr: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig2e.txt : Imaginary part of the transfer function (Hi) as a function of temperature for GYAGG:Ce,Cr: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig3a_SAO.txt : Trapping efficiency as a function of temperature for SAO:Eu,Dy: Temperature in K (column 1), trapping efficiency (column 2). - Fig3a_GYAGG.txt : Trapping efficiency as a function of temperature for GYAGG:Ce,Cr: Temperature in K (column 1), trapping efficiency (column 2). - Fig3b_SAO.txt : Trapping rate and total decay rate as a function of temperature for SAO:Eu,Dy: Temperature in K (column 1), trapping rate in Hz (column 2), total decay rate in Hz (column 3). - Fig3b_GYAGG.txt : Trapping rate and total decay rate as a function of temperature for GYAGG:Ce,Cr: Temperature in K (column 1), trapping rate in Hz (column 2), total decay rate in Hz (column 3).
description: Ensuring the thermal reliability of luminescent materials is a key requirement for next-generation lighting, display, and sensing technologies. The intricate interplay of thermal crossover and thermal ionization in lanthanide-doped phosphors often obscures their individual contributions. We present a frequency-domain photoluminescence analysis that disentangles these competing mechanisms. Using single crystals of SrAl₂O₄:Eu²⁺,Dy³⁺ (SAO:Eu,Dy) and (Gd₀.₃₃Y₀.₆₇)₃Al₂.₄Ga₂.₆O₁₂:Ce3+,Cr3+ (GYAGG:Ce,Cr) as model systems, we extract temperature-dependent trapping efficiencies and decay rates by analyzing the phase and amplitude response of luminescence under modulated excitation. Our approach reveals distinct signatures of thermal ionization and enables the direct quantification of ionization barriers and crossover rates. We demonstrate that SAO:Eu,Dy exhibits dominant trapping behavior with high ionization efficiency, while GYAGG:Ce,Cr shows significant competition between ionization and crossover. This method provides a powerful framework for resolving overlapping quenching pathways and offers new insights for the design of thermally robust luminescent materials.
description: - Fig1b_emi.txt : PL spectra of SAO:Eu,Dy at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1b_exc.txt : Excitation spectra of SAO:Eu,Dy at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1c_emi.txt : PL spectra of GYAGG:Ce,Cr at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1c_exc.txt : Excitation spectra of GYAGG:Ce,Cr at 200K: Wavelength in nm (column 1), intensity in detector counts (column 2). - Fig1d.txt : PL quenching curves of SAO:Eu,Dy: Temperature in K (column 1), intensity in detector counts for an excitation density of 4mW/cm2 (column 2), intensity in detector counts for an excitation density of 0.04mW/cm2 (column 3). - Fig1e.txt : PL quenching curves of GYAGG:Ce,Cr: Temperature in K (column 1), intensity in detector counts for an excitation density of 4mW/cm2 (column 2), intensity in detector counts for an excitation density of 0.04mW/cm2 (column 3). - Fig2a.txt : Real part of the transfer function (Hr) as a function of temperature for SAO:Eu,Dy: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig2b.txt : Imaginary part of the transfer function (Hi) as a function of temperature for SAO:Eu,Dy: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig2d.txt : Real part of the transfer function (Hr) as a function of temperature for GYAGG:Ce,Cr: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig2e.txt : Imaginary part of the transfer function (Hi) as a function of temperature for GYAGG:Ce,Cr: Data is given in a matrix form with the first column corresponding to frequency in Hz and the first row corresponding to temperature in K. - Fig3a_SAO.txt : Trapping efficiency as a function of temperature for SAO:Eu,Dy: Temperature in K (column 1), trapping efficiency (column 2). - Fig3a_GYAGG.txt : Trapping efficiency as a function of temperature for GYAGG:Ce,Cr: Temperature in K (column 1), trapping efficiency (column 2). - Fig3b_SAO.txt : Trapping rate and total decay rate as a function of temperature for SAO:Eu,Dy: Temperature in K (column 1), trapping rate in Hz (column 2), total decay rate in Hz (column 3). - Fig3b_GYAGG.txt : Trapping rate and total decay rate as a function of temperature for GYAGG:Ce,Cr: Temperature in K (column 1), trapping rate in Hz (column 2), total decay rate in Hz (column 3).