| abstract |
The various inventions and/or their embodiments disclosed herein relate to and include 2-alkyl-5-phenyl-1,3,4-oxadiazole-carbazole ("2-APOC") small molecules having both hole carrying and electron carrying groups bound thereto, and the use of such ambipolar polymers, copolymers, and/or small molecules as host materials for carrying holes, electrons, and/or excitons into contact with guest light emitters, for use in the emissive layers of electronic devices such as organic light emitting diodes. |