Extremely stable graphene electrodes doped with macromolecular acid.

Citation data:

Nature communications, ISSN: 2041-1723, Vol: 9, Issue: 1, Page: 2037

Publication Year:
2018
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/24193
PMID:
29795168
DOI:
10.1038/s41467-018-04385-4
Author(s):
Kwon, Sung-Joo; Han, Tae-Hee; Ko, Taeg Yeoung; Li, Nannan; Kim, Youngsoo; Kim, Dong Jin; Bae, Sang-Hoon; Yang, Yang; Hong, Byung Hee; Kim, Kwang S.; Ryu, Sunmin; Lee, Tae-Woo Show More Hide
Publisher(s):
NATURE PUBLISHING GROUP
Tags:
Chemistry; Biochemistry, Genetics and Molecular Biology; Physics and Astronomy
Most Recent Blog Mention
article description
Although conventional p-type doping using small molecules on graphene decreases its sheet resistance (R), it increases after exposure to ambient conditions, and this problem has been considered as the biggest impediment to practical application of graphene electrodes. Here, we report an extremely stable graphene electrode doped with macromolecular acid (perfluorinated polymeric sulfonic acid (PFSA)) as a p-type dopant. The PFSA doping on graphene provides not only ultra-high ambient stability for a very long time (> 64 days) but also high chemical/thermal stability, which have been unattainable by doping with conventional small-molecules. PFSA doping also greatly increases the surface potential (~0.8 eV) of graphene, and reduces its R by ~56%, which is very important for practical applications. High-efficiency phosphorescent organic light-emitting diodes are fabricated with the PFSA-doped graphene anode (~98.5 cd A without out-coupling structures). This work lays a solid platform for practical application of thermally-/chemically-/air-stable graphene electrodes in various optoelectronic devices.