Over 40 publications using NanoIntegris materials.
Filter papers by topic: |
|
| Transistors | Biomedical |
| Electromechanical | Electrochemical |
| Optoelectronic Devices | Other Research |
| Chemical and Biological Sensors | Review Articles |
Optoelectronic Devices
The Polarized Carbon Nanotube Thin Film LED
Application: Optoelectronic Devices, Transistors
Summary: We demonstrate a light emitting p-i-n diode made of a highly aligned film of separated (99%) semiconducting carbon nanotubes, self- assembled from solution. By using a split gate technique, we create p- and n-doped regions in the nanotube film that are separated by a micron-wide gap. We inject p- and n-type charge carriers into the device channel from opposite contacts and investigate the radiative recombination using optical micro-spectroscopy. We find that the threshold-less light generation efficiency in the intrinsic carbon nanotube film segment can be enhanced by increasing the potential drop across the junction, demonstrating the LED- principle in a carbon nanotube film for the first time. The device emits infrared light that is polarized along the long axes of the carbon nanotubes that form the aligned film.
Ultrabroadband Photodetection Based on Graphene Ink
Application: Optoelectronic Devices
Citation: A. Radoi, A. Iordanescu, A. Cismaru, M. Dragoman, D. Dragoman, Nanotechnology (2010), 21 455202.
Summary: We report photodetection in a very large spectral bandwidth, which encompasses ultraviolet, visible and near infrared, using graphene inks or graphene inks functionalized with either gold or silver nanoparticles, or gold nanoparticles further encapsulated with bovine serum albumin deposited on interdigitated electrodes fabricated on a silicon dioxide/silicon substrate. In contrast to gold-functionalized graphene inks, which have responsivities better than 1 mA W-1 at a 0.1 V bias over the huge bandwidth extending from 215 to 2500 nm, Ag-functionalized inks show at least a four-fold increased responsivity, with a record value of 13.7 mA W-1 in near infrared.
Enhanced Electromodulation of Infrared Transmittance in Semitransparent Films of Large Diameter Semiconducting Single-Walled Carbon Nanotubes
Application: Optoelectronic Devices
Citation: Feihu Wang, Mikhail E. Itkis, Robert C. Haddon, Nano Letters (2010), 10, 3, 937-942.
Summary: We report a comprehensive study of the gate-induced electromodulated transmittance of infrared light by single-walled carbon nanotube (SWNT) thin films. The observed electromodulation is significantly enhanced by utilizing large diameter SWNTs, increasing the ratio of semiconducting to metal SWNTs, and by decreasing the SWNT film thickness. The amplitude of the effect reported herein (∼7%) is more than an order of magnitude larger than in previous SWNT thin film solid state devices.
