GaN-based light-emitting diodes on graphene-coated flexible substrates

• DOI: 10.1364/oe.22.00a812
• Publication Date: 2014-04-07T19:57:11Z
• Authors: Gwangseok Yang; Younghun Jung; Camilo Vélez Cuervo; Fan Ren; Stephen J. Pearton; Jihyun Kim
• Keywords: Transfer printing

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 Excimer laser heating, followed transfer of to substrates. These coated tri-layer wet method. Optical electrical properties lift-offed characterized under both relaxed strained conditions. The remained conducting when graphene/paper structure was folded. high transmittance, low sheet resistance failure strain make it an ideal candidate transparent conductive layer in optoelectronics.