Surface modification of graphene using HBC-6ImBr in solution-processed OLEDs
Journal
Journal of Applied Physics
Journal Volume
123
Journal Issue
2
Pages
24303
Date Issued
2018
Author(s)
Cheng, T.-C.
Ku, T.-A.
Huang, K.-Y.
Chou, A.-S.
Chang, P.-H.
Chang, C.-C.
Yue, C.-F.
Liu, C.-W.
Wang, P.-H.
Abstract
In this work, we report a simple method for solution-processed organic light emitting devices (OLEDs), where single-layer graphene acts as the anode and the hexa-peri-hexabenzocoronene exfoliating agent (HBC-6ImBr) provides surface modification. In SEM images, the PEDOT:PSS solution fully covered the graphene electrode after coating with HBC-6ImBr. The fabricated solution-processed OLEDs with a single-layer graphene anode showed outstanding brightness at 3182 cd/m2 and current efficiency up to 6 cd/A which is comparable to that of indium tin oxide films, and the OLED device brightness performance increases six times compared to tri-layer graphene treated with UV-Ozone at the same driving voltage. This method can be used in a wide variety of solution-processed organic optoelectronics on surface-modified graphene anodes.
SDGs
Type
journal article