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Symposium and Seminars: May 21-26, 2022
Exhibition: May 23-25, 2023, Booth No. 429, Toray Industries, Inc.
Venue: Los Angeles Convention Center

1) Poster Session
P.116
Thursday, May 25, 2023
5:00 PM – 8:00 PM

“Elucidation of OLED Degradation Mechanism Using Mass Spectrometry and Theoretical Analysis
Keisuke Sawada*, Daichi Shirakura*, Takahiro Shibamori*, Takashi Miyamoto*,
Motoyuki Uejima**, Tohru Sato**, and Kei Sakanoue**
*Toray Research Center, Inc., 2-11 Sonoyama 3-chome, Otsu, Shiga 520-8567, Japan
**MOLFEX Inc., 34-4 Takano-Nishibiraki-cho, Sakyo-ku, Kyoto-shi, Kyoto 606-8103, Japan

We elucidated the degradation mechanism of OLEDs using mass spectrometry and theoretical analysis. GCIB-TOF-SIMS and MS/MS revealed that the carbazole group adduct to mCBP was formed in the emission layer of the degraded OLED. The generation process of the degradation product was clarified using quantum chemical calculations and vibronic coupling density analysis.

2) Exhibitors’ Forum
“Current Analytical Technologies for Displays”

Session: OLEDs
Session Number: F5.2
Tuesday, May 23, 2023

We present TRC's latest technologies for displays.