Molecular design of thermally activated delayed fluorescent emitters for blue-shifted emission by methoxy substitution. (English)

The molecular design method of thermally activated delayed fluorescent emitters for blue-shifted emission was developed by modifying a phenyl linker using a methoxy substituent. One methoxy or two methoxy groups were introduced into the phenyl linker connecting a diphenyltriazine acceptor and a dimethylacridine donor to manage the emission spectrum. Substitution of one methoxy group shifted the emission color to a short wavelength while preserving the external quantum efficiency of the pristine material without the methoxy substituent. A high external quantum efficiency of over 20% was obtained while blue-shifting the emission wavelength by 12 nm. However, the substitution of two methoxy groups decreased the quantum efficiency of the devices although the emission color was shifted to a short wavelength. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Materials Chemistry C is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)