Efficient flexible graphene-based light-emitting device
In recent years, the flexible light-emitting device (LED) has become the main focus in the field of display technology. Graphene, as a Two-Dimensional layered material, has attracted great interests in LEDs due to its excellent properties. However, there are many problems such as efficiency, lifetime, and flexibility not well solved. Herein, we have successfully prepared a flexible LED using laser-induced reduced graphene oxide (LIRGO). The LIRGO LED achieves a luminescence lifetime over 60 hours and a wall plug efficiency up to 1.4% at a vacuum environment of 0.02 Pa. There are many small luminescent spots randomly distributed on 3.5*5 mm2 of LIRGO. LIRGO’s luminous behavior can be controlled by modifying the supply voltage and laser’s reducing intensity. We also explore LIRGO’s applications by testing it in different packages and customizable bulb. Furthermore, as an interesting demo, the LIRGO device can be used to mimic constellations with visual shapes. This work demonstrates LIRGO’s great potential in many fields, such as flexible and miniature light sources and displays.