Effect of thermal treatment on ZnSe quantum dots and energy transfer in borosilicate glasses doped with ZnSe and Er3+/ZnSe

Autor(es)

Shasmal, Nilanjana ; de Camargo, Andrea Simone Stucchi ; Rodrigues, Ana Candida Martins

• Tipo de documento: Artigo Científico
• Fonte: Journal of Non-Crystalline Solids; v. 612, p. 11-pg., 2023-04-26.

Resumo

This study assessed the effect of heat treatment on the spectroscopic properties of borosilicate glasses doped with ZnSe quantum dots (QDs) and co-doped with Er3+/ZnSe. The gradual growth of ZnSe QDs upon heat treatment was probed by TEM. The emission intensity of ZnSe-doped glasses rapidly increased up to 20 h of heat treatment because of the formation and development of ZnSe QDs, then gradually decreased due to the rise in non-radiative loss between the enlarged particles. With increasing number of ZnSe QDs, the energy transfer from QDs to Er3+ ions became prominent in Er3+/ZnSe-co-doped glasses, showing enhanced emission up to 20 h of heat treatment. The excited state 4S3/2 lifetime values, increased with heat treatment, whereas an opposite trend was observed for the lifetime values of state 4I13/2, indicating a possible participation of the ZnSe QDs in facilitating the energy migration mechanism through the 4I13/2 level, followed by non-radiative decay. (AU)

• Processo FAPESP: 18/04113-8 - Síntese, Propriedades Ópticas e Aplicações de Vidros e Vitro-Cerâmicas com Nanopartículas Dispersas de Semicondutor ou Híbridas de Semicondutor-metal.
• Beneficiário: Nilanjana Shasmal
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs