Light sources at the nanoscale
Electroluminescent devices, which emit visible light upon the application of a voltage, are key components for optoelectronics and photonics applications. CNS researchers have used very thin fibers made from a molecular semiconductor material using a technique called electrospinning to fabricate very small electroluminescent devices. The devices emitted light from an area that was approximately 250x 300 nm 2 , making them among the smallest electroluminescent devices demonstrated to date. These dimensions were defin ed by the diameter of the fibers and the device physics. These devices could find use in applications such as on-chip optoelectronic interconnects for telecommunications, advanced optical microscopy, and sensors.
Top: Image of a light-emitting fiber (vertical) positioned across an electrode array.
Bottom: A false color image of the light emission from the fiber.
[CNS Investigators: Malliaras group – Nanoelectronics Thrust, Center for Nanoscale Systems, in collaboration with Craighead and Abruña, Cornell University]
For additional information see:
- J.M. Moran-Mirabal, J.D. Slinker, J.A. DeFranco, S.S. Verbridge, R. Ilic, S. Flores-Torres, H.D. Abruña, G.G. Malliaras, and H.G. Craighead, “Electrospun, light-emitting nanofibers”, NanoLetters, vol 7, pp 458 – 463, (2007).