| Full text | |
| Author(s): |
Dantas, N. F.
;
Melo, G. H. A.
;
Lodi, T. A.
;
Pedrochi, F.
;
Steimacher, A.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of Luminescence; v. 270, p. 10-pg., 2024-03-14. |
| Abstract | |
In this work, a series of zinc borophosphate glasses (ZnPBAl), doped and codoped with Dy 3 + and Sm 3 + , was studied for potential application in W -LEDs. The samples were prepared by the melt -quenching method and their luminescent and optical properties were investigated. The optical absorption spectra presented all Dy 3 + and Sm 3 + peaks corresponding to the transitions from the 6 H 15/2 and 6 H 5/2 states, respectively, to the excited energy levels. The 350 nm excitation source was chosen, considering photoluminescence excitation (PLE) results, to investigate the energy transfer from Dy 3 + to Sm 3 + ions. The energy transfer was indicated by photoluminescence (PL) spectra of Dy:Sm-codoped glasses and investigated by the energy transfer efficiency (eta) using the lifetime data of both doped and codoped samples. The PL as a function of temperature was also studied. The CIE diagram of Dy-doped glasses showed their color emission close to the white region and the simulation of a combined Blue LED created an illumination route from warm to cold white light. (AU) | |
| FAPESP's process: | 23/01625-6 - Development of new methodologies for the manufacture of optical fibers from exotic glasses |
| Grantee: | Marcelo Nalin |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 23/09906-4 - Development of new methodologies for the manufacture of optical fibers from exotic glasses |
| Grantee: | Thiago Augusto Lodi |
| Support Opportunities: | Scholarships in Brazil - Support Program for Fixating Young Doctors |