Multicolor graphene nanoribbon/semiconductor nanowire heterojunction light-emitting diodes

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
DOI: 10.1039/c1jm11441g Publication Date: 2011-07-01T08:35:02Z
ABSTRACT
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
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES (32)
CITATIONS (58)