Alcohol-processable organic amorphous electrolytes as an effective electron-injection layer for organic light-emitting diodes.
A new series of monoammonium-based organic electrolytes with the tetrafluoroborate (BF(4)(-)) 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.
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, China.
Gang
G
Liu
Yan-Hu
YH
Li
Wan-Yi
WY
Tan
Zhi-Cai
ZC
He
Xiao-Tie
XT
Wang
Chi
C
Zhang
Yue-Qi
YQ
Mo
Xu-Hui
XH
Zhu
Junbiao
J
Peng
Yong
Y
Cao