Highly red-shifted NIR emission from a novel anthracene conjugated polymer backbone containing Pt(II) porphyrins
D.M.E. Freeman, A. Minotto, W. Duffy, K.J. Fallon, I. McCulloch, F. Cacialli, H. Bronstein
Polym. Chem., 7,
Diphenylanthracene (DPA), semiconducting polymer
We present the synthesis of a novel diphenylanthracene (DPA) based semiconducting polymer. The polymer is solubilised by alkoxy groups attached directly to a DPA monomer, meaning the choice of co-monomer is not limited to exclusively highly solubilising moieties. Interestingly, the polymer shows a red-shifted elecroluminescence maximum (510 nm) when compared to its photoluminescence maximum (450 nm) which we attribute to excimer formation. The novel polymer was utilised as a host for a covalently-linked platinum(II) complexed porphyrin dopant. Emission from these polymers was observed in the NIR and again showed almost a 100 nm red shift from photoluminescence to electroluminescence. This work demonstrates that utilising highly aggregating host materials is an effective tool for inducing red-shifted emission in OLEDs.
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