Our research group succeeded in the development of band diagram measurement system in atmospheric condition for organic semiconductor materials such as organic light emitting device (OLED). Band diagram shows absolute value of higher occupied molecular orbital (HOMO) energy level and lower unoccupied molecular orbital (LUMO) energy level from the vacuum level.

The developed system is a combination of a spectrophotometer system and a photoemission yield system in atmospheric condition. The system is designed to measure the optical property (Band gap) and the electric property (Ionized potential) at the same time. This system can be applied to the development for new materials discovery and devices fabrication.

Shinjiro Yagyu¹*, Michiko Yoshitake¹, Masahiro Goto¹, Toyohiro Chikyo¹

International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Email: Shinjiro Yagyu, Ph.D<YAGYU.Shinjironims.go.jp>
Telephone: +81-29-860-4496

NIMS Public Relations Office
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