Rosin-enabled ultraclean and damage-free transfer of graphene for large-area flexible organic light-emitting diodes.

ABSTRACT: The large polymer particle residue generated during the transfer process of graphene grown by chemical vapour deposition is a critical issue that limits its use in large-area thin-film devices such as organic light-emitting diodes. The available lighting areas of the graphene-based organic light-emitting diodes reported so far are usually <1?cm2. Here we report a transfer method using rosin as a support layer, whose weak interaction with graphene, good solubility and sufficient strength enable ultraclean and damage-free transfer. The transferred graphene has a low surface roughness with an occasional maximum residue height of about 15?nm and a uniform sheet resistance of 560?? per square with about 1% deviation over a large area. Such clean, damage-free graphene has produced the four-inch monolithic flexible graphene-based organic light-emitting diode with a high brightness of about 10,000?cd?m-2 that can already satisfy the requirements for lighting sources and displays.

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC5333113 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature