Operando direct observation of spin-states and charge-trappings of blue light-emitting-diode materials in thin-film devices.

ABSTRACT: Spin-states and charge-trappings in blue organic light-emitting diodes (OLEDs) are important issues for developing high-device-performance application such as full-color displays and white illumination. However, they have not yet been completely clarified because of the lack of a study from a microscopic viewpoint. Here, we report operando electron spin resonance (ESR) spectroscopy to investigate the spin-states and charge-trappings in organic semiconductor materials used for blue OLEDs such as a blue light-emitting material 1-bis(2-naphthyl)anthracene (ADN) using metal-insulator-semiconductor (MIS) diodes, hole or electron only devices, and blue OLEDs from the microscopic viewpoint. We have clarified spin-states of electrically accumulated holes and electrons and their charge-trappings in

SUBMITTER: Osawa F 

PROVIDER: S-EPMC7606584 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature