Innovative synthesis of Tm³⁺/Er³⁺-doped Yb-YGG single crystals for upconversion-based white light emission

Author(s)

Albino, Leonardo Vieira ; Delendatti, Agustin ; Caixeta, Fabio Jose ; Lodi, Thiago Augusto ; Franco, Douglas Faza ; Pinto, Camila Batista ; Ellena, Javier Alcides ; Nalin, Marcelo

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 51, n. 12, p. 10-pg., 2025-04-25.

Abstract

In recent years, there has been a growing interest in developing advanced materials for photonics applications, particularly for efficient white light emission, which is crucial for technologies like solid-state lighting and display devices. One interesting approach for emitting white light is Upconversion (UC) luminescence. This study focuses on synthesis, by a new and alternative method, and characterization of yttrium ytterbium gallium garnet (Yb-YGG) single crystals, specifically Y1.8Yb1.2Ga5O12, doped with various concentrations of Er3+ and Tm3+ ions. These crystals were studied intending to enhance UC luminescence properties for white light generation by modifying their respective emissions in the red, green, and blue (RGB) regions. Unlike traditional methods such as Czochralski, these crystals were produced by controlled nucleation and growth through gradual cooling of a specific glass mixture, leading to Yb-YGG single crystals doped with different concentrations of Yb3+, Er3+, and Tm3+ ions. By optimizing the Yb3+/Tm3+/Er3+ ratio, the study allowed to obtain micrometric single crystals that efficiently emit white light via UC. The crystals were characterized by X-ray diffraction, optical and electronic microscopies, EDS and luminescence spectroscopy. (AU)

• 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
• 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: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
• Grantee: Edgar Dutra Zanotto
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 17/15850-0 - X-ray diffraction as a tool in potential drug development
• Grantee: Eduardo Ernesto Castellano
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 23/10889-7 - Studies on the structure and activity of RuI/arene/mercaptoligand complexes against cancer
• Grantee: Camila Batista Pinto
• Support Opportunities: Scholarships in Brazil - Post-Doctoral