title: Flexible graphene-based electroluminescent devices.
abstract: For the first time, large-area CVD-grown graphene films transferred onto flexible PET substrates were used as transparent conductive electrodes in alternating current electroluminescence (ACEL) devices. The flexible ACEL device based on a single-layer graphene electrode has a turn-on voltage of 80 V; at 480 V (16 kHz), the luminance and luminous efficiency are 1140 cd/m(2) and 5.0 lm/W, respectively. The turn-on voltage increases and the luminance decreases with increasing stacked layers of graphene, which means the single-layer graphene is the best optimal choice as the transparent conductive electrode. Furthermore, it demonstrates that the graphene-based ACEL device is highly flexible and can work very well even under a very large strain of 5.4%, suggesting great potential applications in flexible optoelectronics.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.
authors.forename: Ze-gao
authors.initials: ZG
authors.lastname: Wang
authors.forename: Yuan-fu
authors.initials: YF
authors.lastname: Chen
authors.forename: Ping-jian
authors.initials: PJ
authors.lastname: Li
authors.forename: Xin
authors.initials: X
authors.lastname: Hao
authors.forename: Jing-bo
authors.initials: JB
authors.lastname: Liu
authors.forename: Ran
authors.initials: R
authors.lastname: Huang
authors.forename: Yan-rong
authors.initials: YR
authors.lastname: Li