A novel hot exciton blue fluorophores and white organic light-emitting diodes with simplified configuration

Abstract

The two efficient non-doped blue emitters with hybridized local and charge transfer state namely, NDBNPIN and DBTPIN have been synthesised and characterised. These materials are employed as a host for green and red phosphorescent OLEDs. The white device based on DBTPIN:Ir(MDQ)2(acac) (4%) exhibit maximum external quantum efficiency (ηex) −24.8%; current efficiency (ηc) −57.1 cdA−1; power efficiency (ηp) −64.8 lmW−1 with Commission Internationale de l’Eclairage (CIE:0.49, 0.40) than NDBNPIN:Ir(MDQ)2acac (4%) device [ηex − 23.1%; ηc −54.6 cd A−1; ηp− 60.0 lm W−1 with CIE (0.47, 0.42)].