One-step additive crosslinking of conjugated polyelectrolyte interlayers: improved lifetime and performance of solution-processed OLEDsElectronic supplementary information (ESI) available. See DOI: 10.1039/c6tc04417d

We crosslink an amino-functionalized polyfluorene by the solvent additive 1,8-diiodooctane (DIO). DIO remains in the film after drying of the main solvent and chemically binds to the amino-side groups after a low temperature annealing step, rendering the polyfluorene film insoluble in non-polar solv...

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Main Authors: Stolz, Sebastian, Petzoldt, Martin, Kotadiya, Naresh, Rödlmeier, Tobias, Eckstein, Ralph, Freudenberg, Jan, Bunz, Uwe H. F, Lemmer, Uli, Mankel, Eric, Hamburger, Manuel, Hernandez-Sosa, Gerardo
Format: Article
Language:English
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Summary:We crosslink an amino-functionalized polyfluorene by the solvent additive 1,8-diiodooctane (DIO). DIO remains in the film after drying of the main solvent and chemically binds to the amino-side groups after a low temperature annealing step, rendering the polyfluorene film insoluble in non-polar solvents. We correlate the amount of DIO, the reduction of operational voltage and increase in lifetime of solution-processed OLEDs. We demonstrate a fully solution-processed device using the crosslinked polyfluorene electron injection layer and an inkjet-printed Ag top electrode. We crosslink an amino-functionalized polyfluorene by the solvent additive 1,8-diiodooctane (DIO).
ISSN:2050-7526
2050-7534
DOI:10.1039/c6tc04417d