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Symposium and Seminars: May 8-13, 2022
Exhibition: May 10-12, 2021, Booth No. 230, Toray Industries, Inc.
Venue: San Jose McEnery Convention Center

1) Oral Session
Session 3: QD-LEDs I (Paper Number 3.2)
Room: 220C
Tuesday, May 10, 2022, 11:10 AM - 12:30 PM

“Analyzing the Degradation Process of Quantum-Dot LEDs (QLEDs) by Mass Spectrometry”

Hin-Wai Mo*, Daichi Shirakura**, Kentaro Harada***,****, Takashi Miyamoto**, Chihaya Adachi*,****
*Fukuoka i3-Center for Organic Photonics and Electronics Research (i3-opera), Fukuoka, Japan
**Toray Research Center, Inc., 3-7 Sonoyama 3-chome, Otsu, Shiga 520-8567 Japan
***OPERA Solutions Inc., 5-4-13 Watanabedori, Chuo-ku, Fukuoka, Japan
****Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan

By utilizing time-of-flight secondary ion mass spectrometry (TOF-SIMS), the degradation processes of the quantum dot core and its surface ligand were studied. Intentionally degraded QLED samples were prepared, and the TOF-SIMS mass composition signals of each layer within the QLEDs are estimated. The analysis result gives possible structural information of the degraded species within the device, providing useful insights for further developments of highly efficient R/G/B Quantum dots materials.

2) Exhibitors’ Forum
Session F5: OLEDs F5.2
Tuesday, May 10, 2022, 3:45 PM – 4:00 PM

“Analytical Technologies for Various Displays”

We present TRC's latest technologies for various displays.