International Display Workshops General Incorporated Association

10:00 〜 10:15

[OLED6-4L(Invited)] Formation mechanism of spontaneous orientation polarization in evaporated films of organic light-emitting diode materials

*Yutaka Noguchi1, Kohei Osada1, Hisao Ishii2 (1. Meiji University (Japan), 2. Chiba University (Japan))

orientation polarization, surface potential, permanent dipole moment, intermolecular interaction

https://doi.org/10.36463/idw.2019.0890

Spontaneous orientation polarization (SOP) affects the device performance of OLEDs. To understand and control SOP, we have studied the formation mechanism. The SOP formation likely results from a balance between an electrostatic interaction of permanent dipole moment and van der Waals interaction on the film surface during deposition.