Eco-friendly polydimethylsiloxane-based self-supporting film containing europium-polyoxometalate: A flexible luminescent material for white light generation

Autor(es)

Simoes, Mateus Batista ^[1] ; Ullah, Sajjad ^{[2, 3]} ; Hazra, Chanchal ^[3] ; Man, Michel Wong Chi ^[4] ; Lima Ribeiro, Sidney Jose ^[3] ; Rodrigues-Filho, Ubirajara Pereira ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Peshawar, Inst Chem Sci, Peshawar 25120, KP - Pakistan

^[3] Univ Estadual Paulista, Inst Quim, BR-14800060 Araraquara, SP - Brazil

^[4] CNRS ENSCM UM, Inst Charles Gerhardt Montpellier, UMR 5253, 8 Rue Ecole Normale, F-34296 Montpellier 05 - France

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 201, p. 384-389, SEP 2018.
• Citações Web of Science: 1

Resumo

Lanthanide (Ln(3+))-doped suitable matrices exhibit unique luminescent properties which are important for applications in optoelectronic devices. Most of the Ln(3+)-based luminescent materials are, however, prepared in powder form using suitable robust inorganic host matrices. These matrices, often, experience lack of flexibility which is important for many applications such as LEDs and wearable devices, among others. To address this aspect, we report the preparation of flexible and highly transparent luminescent membranes based on poly-dimethylsiloxane- hydroxyurethanes (PDMSUr) as the hybrid framework and Europium-polyoxometalate (Eu (PW11)(2)) complex as the luminescent component. The PDMSUr, besides acting as green, transparent and flexible matrix, is found to increase the emission decay lifetime (from 1.5 ms to 3.0 ms) when Eu(PW11)(2) is incorporated in the hybrid matrix. Moreover, upon UV excitation, the matrix exhibits a broader emission around 450 nm which, together with the characteristic emission of Eu3+ ions, leads to the generation of white light. (AU)

• Processo FAPESP: 15/18733-0 - Nanoparticulas de compostos de lantanideos para aplicação como biosensores baseados em conversão ascendente de energia
• Beneficiário: Chanchal Hazra
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/22875-4 - Desenvolvimento de fotocatalisadores sensíveis a radiação infravermelho/visível para aplicações fotocatalíticas empregando luz solar
• Beneficiário: Sajjad Ullah
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado