Abstract
Electroluminescent Tb-complex containing non-conjugated polymer (PKMOTb) with dual transporting properties has been studied. The carbazole side groups serve as hole transporter and diphenyloxadiazole (DPO) groups serve as electron transporter. The photoluminescence study on the polymer film reveals an energy transfer from both carbazole and DPO groups to Tb complex moieties, enhancing Tb 3+ ion’s characteristic sharp emission at 545 nm. A single layer light emitting diodes with the structure ITO/PKMOTb/Al was fabricated. Typical semiconductor current ( I ) voltage ( V ) property was observed in this device. Emissive spectrum with sharp peaks was recorded when this device was driven under a positive bias above the turn on voltage of 6.2 V. Mechanism of the electroluminescence was also discussed.
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