Blue Electroluminescence from a Novel Donor/Acceptor Polymer Structure

The right balance in the rates of electron and hole injection is critical in order to achieve high-efficiency light-emitting diodes. Here is reported a new series of blue-emitting conjugated polymers (see Figure) comprising alternating π-rich phenylene and π-deficient pyridyl moieties prepared by a Suzuki coupling method. Devices prepared using the polymers showed strong blue emission at room temperature.