White light emitting devices by doping polyfluorene with two red emitters

Date

2013-02-01

Author

de Deus, Jeferson F.
Faria, Gregorio C.
Faria, Roberto M.
Iamazaki, Eduardo T.
Atvars, Teresa D. Z.
Çırpan, Ali
Akcelrud, Leni

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

112
views

0
downloads

The photo and electroluminescent properties of a single-layer multi-component blend composed of only blue and red emitters were studied. The blue emitter poly(9,9-dihexyl-2,7-fluorene)] (LaPPS10) was used as the matrix, and the two red emitters, poly[2-methoxy-5-(2-ethylhexoxy)-1,4-phenylene vinylene] (MEH-PPV) and 4-(dicyanomethylene)-2-methyl-6-(dimethylaminostyryl)-4H-pyrane (DCM), as the dopants. A detailed study of this system was performed in solution and in the solid state, comparing the photophysics aspects of emission spectra of the blend and those of the matrix with each one of the components. The white OLED device exhibited CIE chromaticity coordinates x = 0.30 and y = 0.31. Electro and photoluminescence emission profiles were discussed.

Subject Keywords

White PLED, Photoluminescence, Electroluminescence, Polymer blends

URI

https://hdl.handle.net/11511/48055

Journal

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

DOI

https://doi.org/10.1016/j.jphotochem.2012.12.018

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Emission tuning study of RGB blends. Interaction of two EL polymers and a red dye de Deus, Jeferson Ferreira; Çırpan, Ali; KARASZ, Frank; AKCELRUD, Leni (Elsevier BV, 2010-03-01) A study of light emission in photo- and electroluminescence in blends composed of a blue and a green emitting polymers with a red dye was performed. To gain information about the tunability of the RGB mixture, the blends varied in composition. The polymers were poly(2,7-9,9′-dihexylfluorenediyl) (blue), poly(9,9-di-hexylfluorenediyl divinylene-alt-1,4-phenylenevinylene) (green) and the dye was 4-(dicyanomethylene)-2-methyl-6-(dimethylaminostyryl)-4H-pyrane (red). It was verified that in photoluminescence F...
Pyrolysis mass spectrometric analysis of copolymer of polyacrylonitrile and polythiophene Oğuz, Gülcan; Hacaloğlu, Jale; Department of Polymer Science and Technology (2004) In the first part of this work, the structural and thermal characteristics of polyacrylonitrile, polyacrylonitrile films treated under the electrolysis conditions in the absence of thiophene, polythiophene and the mechanical mixture and a conducting copolymer of polyacrylonitrile/polythiophene have been studied by pyrolysis mass spectrometry technique. The thermal degradation of polyacrylonitrile occurs in three steps; evolution of HCN, monomer, low molecular weight oligomers due to random chain cleavages a...
Novel donor-acceptor type polymers towards excellent neutral state green polymeric materials for realization of RGB based electrochromic device applications Günbaş, Görkem Emrullah; Toppare, Levent Kamil; Department of Chemistry (2007) Polymers having one of the three complementary colors (red, green, and blue) in the reduced state and high transmissivity in the oxidized state are key materials towards use in electrochromic devices and displays. Although many neutral state red and blue polymers were reported up to date, neutral state green polymeric materials appear to be limited. For potential application of electrochromic materials in display technologies, one should have to create the entire color spectrum and this can be only achieved...
Low-temperature visible photolummescence and optical absorption in Tl2In2Se3S semiconductor Güler, Işıkhan; Hasanlı, Nızamı; Turan, Raşit (2007-05-31) The emission band spectra of undoped T1(2)In(2)Se(3)S layered crystals have been studied in the temperature range of 25-63 K and the wavelength region of 570-700nm. A broad photoluminescence band centered at 633 nm (1.96 eV) was observed at T = 25 K. Variation of emission band has been studied as a function of excitation laser intensity in the 2.7-111.4mWcm(-2) range. Radiative transitions from shallow donor level located at 0.03 eV below the bottom of conduction band to deep acceptor level located at 0.23 ...
Optical absorption and reflection studies of Tl4InGa3S8 layered single crystals Goksen, K.; Hasanlı, Nızamı; Ozkan, H. (Institute of Physics, Polish Academy of Sciences, 2007-07-01) The optical properties of Tl4InGa3S8 layered single crystals have been studied by means of transmission and reflection measurements in the wavelength region between 400 and 1100 nm. The analysis of the room temperature absorption data revealed the presence of both optical indirect and direct transitions with band gap energies of 2.40 and 2.61 eV, respectively. Transmission measurements carried out in the temperature range of 10-300 K revealed the rate of change of the indirect band gap with temperature as g...

Citation Formats

J. F. de Deus et al., “White light emitting devices by doping polyfluorene with two red emitters,” JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, pp. 45–51, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48055.