Yang Gwangseok, Jung Younghun, Cuervo Camilo Vélez, Ren Fan, Pearton Stephen J, Kim Jihyun
Opt Express. 2014 May 5;22 Suppl 3:A812-7. doi: 10.1364/OE.22.00A812.
We demonstrate GaN-based thin light-emitting diodes (LEDs) on flexible polymer and paper substrates covered with chemical vapor deposited graphene as a transparent-conductive layer. Thin LEDs were fabricated by lifting the sapphire substrate off by Excimer laser heating, followed by transfer of the LEDs to the flexible substrates. These substrates were coated with tri-layer graphene by a wet transfer method. Optical and electrical properties of thin laser lift-offed LEDs on the flexible substrates were characterized under both relaxed and strained conditions. The graphene on paper substrates remained conducting when the graphene/paper structure was folded. The high transmittance, low sheet resistance and high failure strain of the graphene make it an ideal candidate as the transparent and conductive layer in flexible optoelectronics.
我们展示了基于氮化镓的薄型发光二极管（LED），其位于覆盖有化学气相沉积石墨烯作为透明导电层的柔性聚合物和纸质基板上。通过准分子激光加热将蓝宝石基板剥离，随后将LED转移到柔性基板上，从而制造出薄型LED。这些基板通过湿转移法涂覆有三层石墨烯。在松弛和应变条件下，对柔性基板上的薄型激光剥离LED的光学和电学性质进行了表征。当石墨烯/纸结构折叠时，纸质基板上的石墨烯仍保持导电。石墨烯的高透射率、低表面电阻和高断裂应变使其成为柔性光电子学中作为透明导电层的理想候选材料。
