Date：2017-09-07 |
Views：1901 |
【Academic writing Sharing 20170906】 |
Molecular design of thermally activated delayed fluorescent emitters for blue-shifted emission color by methoxy substitution
Article excerpt is from:Chan Seok Oh, Si Hyun Han, Jun Yeob Lee
J. Mater. Chem. C, 2017, in press
Molecular design method of thermally activated delayed fluorescent emitters for blueshifted emission color was developed by modifying a phenyl linker using a methoxy substituent. One methoxy or two methoxy groups were introduced in 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 short wavelength while preserving the external quantum efficiency of the pristine material without the methoxy substituent. A high external quantum efficiency over 20% was obtained while blue-shifting the emission wavelength by 12 nm. However, substitution of two methoxy groups decreased quantum efficiency of the devices although the emission color was shifted to short wavelength.
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