Spectroscopic study of the Tb3+→Eu3+ energy transfer process in TbAl3(BO3)4 doped with 1 % mol of Eu3+ in the 12-310 K temperature range

resumo

The Tb3+-to-Eu3+ non-radiative energy transfer was studied through temperature-dependent luminescence spectroscopy (12-310 K), in TbAl3(BO3)(4) crystals doped with 1 % mol Eu3+ grown in a K2SO4-MoO3 flux. Excitation and emission spectra were recorded and analyzed, along with the luminescence decay curves of the Tb3+ emitting level (D-5(4)). In the temperature range of 110-310 K, the decay curves were fitted using an adaptation of the Parent et al. model [20], where the Tb3+-to-Eu3+ energy transfer process is described by the W parameter, representing the energy migration-assisted transfer. W (and thus the Tb3+-to-Eu3+ transfer probability) decreases as temperature drops, reaching a plateau around 100 K. Below this temperature, the transfer probability remains relatively unaffected by further temperature reductions, likely due to the influence of non-regular Tb3+ ions on the excited state dynamics of the D-5(4) level.

palavras-chave

LUMINESCENCE; MIGRATION; CRYSTALS; TB-3+; EU-3+

categoria

Materials Science

autores

Ceccon, L; Ruggieri, S; Bettinelli, M; Carlos, LD; Brites, CDS; Neto, ANC; Piccinelli, F

Grupos

G2 - Materiais Fotónicos, Eletrónicos e Magnéticos

Projectos

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)

agradecimentos

The authors gratefully thank Inocencio R. Martin from the Department of Physics, Instituto de Materiales y Nanotecnologia (IMN) , University of La Laguna, S/C de Tenerife, Spain, for the useful discussion on the kinetic model adopted in this contribution, and Erica Viviani from the University of Verona for expert technical assistance. Authors from the University of Verona gratefully thank the Facility "Centro Piattaforme Tecnologiche" (CPT) for access to the Fluorolog 3 (Horiba-Jobin Yvon) spectrofluorometer. This work was partially developed within the scope of the projects CICECO-Aveiro Institute of Materials, UIDB/50011/2020 (DOI:10.54499/UIDB/50011/2020) , UIDP/50011/2020 (DOI: 10.54499/UIDP/50011/2020) and LA/P/0006/2020 (DOI:10.54499/LA/P/0006/2020) financed by Portuguese funds through the FCT/MEC (PIDDAC) , and when appropriate, cofinanced by FEDER under the PT2020 Partnership through European Regional Development Fund (ERDF) in the frame of Operational Competitiveness and Internationalization Programme (POCI) . LC thanks Fernando Maturi and Julio Corredoira-Vazquez (University of Aveiro) for the help with the temperature-dependent luminescence measurements.r 50011/2020 (DOI:10.54499/UIDB/50011/2020) , UIDP/50011/2020 (DOI: 10.54499/UIDP/50011/2020) and LA/P/0006/2020 (DOI:10.54499/LA/P/0006/2020) financed by Portuguese funds through the FCT/MEC (PIDDAC) , and when appropriate, cofinanced by FEDER under the PT2020 Partnership through European Regional Development Fund (ERDF) in the frame of Operational Competitiveness and Internationalization Programme (POCI) . LC thanks Fernando Maturi and Julio Corredoira-Vazquez (University of Aveiro) for the help with the temperature-dependent luminescence measurements.