Tuning colors in novel electroluminescent devices based on Al-indandionate complexes
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2017
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INTERNATIONAL CONFERENCE ON LUMINESCENCE, 18th
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In the past years, the development of materials for organic light-emitting diodes (OLEDs) have attracted much attentions [1]. In this sense, the present work reports about syntheses, characterization, Photo (PL) - and electroluminescence (EL) properties of Al-indandionate complexes of formula [Al(aind)3], where aind: 2-acetyl-1,3-indandionate (acind), 2-benzoyl-1,3-indandionate (bind) or 2-(4-methyl)benzoyl-1,3-indandionate (mbind). These complexes were characterized by elemental analyses, Fourier-infrared absorption spectroscopy, thermogravimetric analyses and 1H-NMR. Photoluminescent spectra of the complexes in both powder and thin film exhibited overlapped broad bands associated to both fluorescence and phosphorescence (see time-resolved spectra, Fig. 1a) phenomena. The electroluminescent devices of configuration ITO/β-NPB/Al(aind)3/LiF/Al (1) exhibited emission in the red spectral region associated to electrophosphorescence (figure 1.b). On the other hand, the three layers devices of configuration ITO/β-NPB/spiro-2CBP/Al(aind)3/Al (2) showed an intensity band in green spectral region (figure 1.b). The OLEDs presented emission from low voltage (~8V), reaching the highest intensity around 16 V. According to these results, the Al-indandionate complexes act as both efficient electron transporters and emitting layers. In addition, these data suggest that TADF process is operative in the bilayer devices.
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COSTA, I.F.; MOURA, J.L.; ADENES, R.E.; BRITO, H.F.; FELINTO, M.C.F.C.; FAUSTINO, W.M.; CREMONA, M.; TEOTONIO, E.E.S. Tuning colors in novel electroluminescent devices based on Al-indandionate complexes. In: INTERNATIONAL CONFERENCE ON LUMINESCENCE, 18th, August 27 - September 01, 2017, João Pessoa, PB. Abstract... p. 262-262. Disponível em: http://repositorio.ipen.br/handle/123456789/28686. Acesso em: 30 Dec 2025.
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