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.

Two kinds of graphene-based composites for photoanode applying in dye-sensitized solar cell

“…Based on the identical reason, the added GSCT film cannot enhance the light-harvesting efficiency of the photoanode. Moreover, the GSCT film is sandwiched between the P25 film and conductive glass, indicating that the additional film cannot play as a light scattering layer (contrarily, a fraction of incident light is diffused and absorbed by the GSCT film) [29]. The similar reflectivity of the P25 and GSCT-P25 photoanodes unambiguously verifies this view (Fig.…”

Highly sensitive gas sensor based on graphene/microfiber hybrid waveguide with Mach-Zehnder interferometer

“…1(b). The microfiber is attached onto the graphene film tightly via the Van der Waals and electrostatic forces, while the graphene is deposited on a MgF 2 substrate (flat in y-z plane) [8]. Fig.…”

Determination of complex refractive index of graphene waveguide by microfiber knot sensor

“…1(b) demonstrates the Raman spectrum of our monolayer Graphene fabricated by CVD method referred in Ref. [10]. MFKCnhis, I photograph of the knot.…”