| Texto completo | |
| Autor(es): |
Germino, Jose Carlos
;
Teixeira Alves Duarte, Luis Gustavo
;
Mendes, Rodrigo Araujo
;
Faleiros, Marcelo Meira
;
de Morais, Andreia
;
de Freitas, Jilian Nei
;
Pereira, Luiz
;
Zambon Atvars, Teresa Dib
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NANOMATERIALS; v. 12, n. 14, p. 21-pg., 2022-07-01. |
| Resumo | |
Herein, we report the synthesis and characterization of two Pt(II) coordination compounds, the new platinum(II)[N,N '-bis(salicylidene)-3,4-diaminobenzophenone)] ([Pt(sal-3,4-ben)]) and the already well-known platinum(II)[N,N '-bis(salicylidene)-o-phenylenediamine] ([Pt(salophen)]), along with their application as guests in a poly [9,9-dioctylfluorenyl-2,7-diyl] (PFO) conjugated polymer in all-solution processed single-layer white organic light-emitting diodes. Completely different performances were achieved: 2.2% and 15.3% of external quantum efficiencies; 2.8 cd A(-1) and 12.1 cd A(-1) of current efficiencies; and 3103 cd m(-2) and 6224 cd m(-2) of luminance for the [Pt(salophen)] and [Pt(sal-3,4-ben)] complexes, respectively. The Commission Internationale de l'Eclairage (CIE 1931) chromaticity color coordinates are (0.33, 0.33) for both 0.1% mol/mol Pt(II):PFO composites at between approximately 3.2 and 8 V. The optoelectronic properties of doped and neat PFO films have been investigated, using steady-state and time-resolved photoluminescence. Theoretical calculations at the level of relativistic density functional theory explained these results, based on the presence of the Pt(II) central ion's phosphorescence emission, considering spin-orbit coupling relationships. The overall results are explained, taking into account the active layer morphological properties, along with the device's electric balance and the emitter's efficiencies, according to deep-trap space-charge models. Considering the very simple structure of the device and the ease of synthesis of such compounds, the developed framework can offer a good trade-off for solution-deposited white organic light-emitting diodes (WOLEDs), with further applications in the field of lighting and signage. (AU) | |
| Processo FAPESP: | 13/07375-0 - CeMEAI - Centro de Ciências Matemáticas Aplicadas à Indústria |
| Beneficiário: | Francisco Louzada Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 13/16245-2 - Propriedades fotofísicas de filmes finos de polímeros conjugados |
| Beneficiário: | Teresa Dib Zambon Atvars |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |