Multicolor graphene nanoribbon/semiconductor nanowire heterojunction light-emitting diodes

• DOI: 10.1039/c1jm11441g
• Publication Date: 2011-07-01T08:35:02Z
• Authors: Yu Ye; Lin Gan; Lun Dai; Hu Meng; Feng Wei; Yu Dai; Zujin Shi; Bin Yu; Xuefeng Guo; Guogang Qin
• Keywords: Condensed Matter - Materials Science; Condensed Matter - Mesoscale and Nanoscale Physics; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci); FOS: Physical sciences; 02 engineering and technology; 0210 nano-technology

We report novel graphene nanoribbon (GNR)/semiconductor nanowire (SNW) heterojunction light-emitting diodes (LEDs) for the first time. In device, GNR and SNW have face-to-face contact with each other, which has merits of a larger active region smaller series resistance, may benefit high-efficiency electroluminescence even electrically driven lasers in future. ZnO, CdS, CdSe NWs were employed our case. At forward biases, GNR/SNW heterjunction LEDs could emit light wavelengths varying from ultraviolet (380 nm) to green (513 red (705 nm), determined by band-gaps involved SNWs. The mechanism emitting was discussed. Our work opens new routes developing diverse graphene-based nano-optoelectronic devices, are basic components integrated optoelectronic system. Besides, graphene/SNW hybrid taking advantage both SNW, will be promising candidates use applications such as high-sensitivity sensor transparent flexible devices