A research group led by Profs. Hajime Nakanotani and Chihaya Adachi (Advanced Energy Conversion Systems Thrust / Center for Organic Photonics and Electronics Research (OPERA)) have found that a small-sized polar host molecule that possesses both high molecular diffusivities and moderate permanent dipole moment, well cancels out the polarization formed by the SOP of the emitter molecules in the EML without a disturbance of the emitter molecules’ intrinsic orientation, leading to high-performance of OLEDs. Their molecular design strategy will allow emitter molecules to pull out the full potential of the EMLs in OLEDs.
Masaki Tanaka, Chin-Yiu Chan, Hajime Nakanotani, and Chihaya Adachi, Simultaneous control of carrier transport and film polarization of emission layers aimed at high-performance OLEDs, Nature Communications, 2024
