On December 5, 2024, NAKANO Shotaro, a 2nd-year master’s student in the Electrical Engineering Program of the Graduate School of Science and Technology (Professor NOGUCHI Yutaka, Organic Molecular Electronics Lab), received the Outstanding Poster Paper Award at The 31st International Display Workshops, held at the Sapporo Convention Center.
This research investigated how spontaneous orientation polarization (SOP) in light-emitting layers of phosphorescent organic EL diodes (OLED) affects charge accumulation and exciton-polaron quenching (EPQ). Using the DCM-PL method, which enables simultaneous evaluation of charge behavior and photoluminescence (PL) inside OLEDs, it analyzed property changes depending on light-emitting materials and doping concentration, and demonstrated that SOP plays a crucial role in OLED performance.
Award winner: NAKANO Shotaro
Title: Correlation between Charge Accumulation and Exciton-Polaron Quenching in Phosphorescent OLEDs With and Without Spontaneous Orientation Polarization in Emission Layer
Presenters: NAKANO Shotaro, NOGUCHI Yutaka