Alcohol‐Processable Organic Amorphous Electrolytes as an Effective Electron‐Injection Layer for Organic Light‐Emitting Diodes |
| |
Authors: | Gang Liu Yan‐Hu Li Wan‐Yi Tan Zhi‐Cai He Xiao‐Tie Wang Chi Zhang Prof Yue‐Qi Mo Prof Xu‐Hui Zhu Prof Junbiao Peng Prof Yong Cao |
| |
Institution: | State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology (SCUT), Guangzhou (China), Fax: (+86)?20‐87110606 |
| |
Abstract: | A new series of monoammonium‐based organic electrolytes with the tetrafluoroborate (BF4?) counteranion have been synthesized. Replacing the pendant ethyl groups in the fluorenyl unit with 4‐ethoxyphenyl groups dramatically improves both solubility and morphological stability. The characterization of the alcohol‐processable amorphous ionic compounds as an electron‐injection layer in organic light‐emitting diodes (OLEDs) reveals that the organic electrolyte that comprises a rigid linear‐conjugated unit provides better device performance, with respect to its counterpart containing a branched bulky moiety. The capability of these compounds to facilitate electron injection from air‐stable aluminum metal is preliminarily discussed on the basis of the investigations of the electron‐only devices and photovoltaic experiments. |
| |
Keywords: | amorphous materials electrolytes electron injection molecular devices solution processability |
|