White electroluminescence based on PFO:CdSe(ZnS):P3OT hybrid blends

•White electroluminescence from hybrid blend.•PFO:CdSe(ZnS):P3OT white emission.•Optical and electrical characterization of PFO:CdSe(ZnS):P3OT films. White light emitting diodes (WOLEDs) were prepared from easily processable materials, well known in the literature (PFO and P3OT), with the intention...

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Bibliographic Details
Published in:Synthetic metals 2018-03, Vol.237, p.10-15
Main Authors: Renzi, W., Cordeiro, N.J.A., Laureto, E., Urbano, A., da Silva, P.R.C., Duarte, J.L.
Format: Article
Language:English
Subjects:
Beta phase
Carrier injection
Electroluminescence
Emission
Energy transfer
Hybrid blend
Light emitting diodes
Luminescence
Mixtures
Optical characterization
Organic light emitting diodes
PFO:CdSe(ZnS):P3OT
Photoluminescence
Polymers
Quantum dots
White electroluminescence
White light
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Summary:•White electroluminescence from hybrid blend.•PFO:CdSe(ZnS):P3OT white emission.•Optical and electrical characterization of PFO:CdSe(ZnS):P3OT films. White light emitting diodes (WOLEDs) were prepared from easily processable materials, well known in the literature (PFO and P3OT), with the intention of exploring the blueshift of the P3OT emission, when in low concentration, in blends with PFO in beta phase. The photoluminescence (PL) study, through donor excitation, of PFO:P3OT blends with different relative concentrations, served as basis for comparing and predicting the behavior of these blends when excited via carrier injection. Despite the good PL results, the white emission of the PFO:P3OT blends with low P3OT concentration was not replicable via electroluminescence (EL), due to the lack of a more intense green component. To circumvent this problem, new PFO:P3OT blends were prepared with the insertion of CdSe(ZnS) quantum dots (QDs), which have green emission. With this new composition, the devices presented white emission (0.33:0.33) at low voltages and current (8 V, 0.250 mA). For the PFO:CdSe(ZnS):P3OT devices, the change in the applied voltage also showed the possibility of tuning the emission of these structures. Therefore, this blend is very attractive to make solution processed, low cost, large area, and flexible lighting panels.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2018.01.005