Comparing rigid inorganic layer, polymeric semiconducting gate layer exhibits superior flexibility as well as efficient carrier manipulation in high frequency AC cycles. Mechanism of the carrier manipulation at the gate in forward and reversed bias of AC cycle is studied. The flexible PET-based AC-OEL device with poly[(9,9-bis(3'-((N,N-dimethyl)-Nethylammonium)- propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN-Br) gate shows a stable electroluminescent performance in frequency sweep with a color rendering index (CRI) over 81 at 2800K color temperature.
Fiber-Based photovoltaic cells are solar collectors that utilize internal reflectors to confine light into an
organic absorber, thereby significantly enhancing absorption cross-sections of the device. The performance
of the device is particularly sensitive to internal resistivity of the "optical can." Using ITO of differing
thicknesses we show that can be controlled and that Jsc's that exceed planar device limits can be achieved.
However, the morphology and film quality of the layers must be maintained to achieve maximum
performance.
KEYWORDS: Near field optics, Fullerenes, Composites, Near field scanning optical microscopy, Optical storage, Near field, Integrated optics, Polymers, Optical computing, Optical signal processing
The rapid development of optical processing in optical circuitry (optical computing) is spawning the need for fully optical nonvolatile memory schemes. Nonvolatile memory schemes typically involve diffraction-limited writing techniques like those found in high-density DVDs and CDs. This need limits their memory density by placing a lower boundary on bit size, which is determined by the wavelength of light used in writing the bit. Using near-field optics can provide a revolutionary approach to optical storage, breaking the diffraction limit by a factor of 10, allowing for significantly enhanced data densities. In this approach, the high-frequency components of the near field are used "to write" information in nanostructured composite ultra-thin films with feature sizes of 200 nm. Fully optical readouts are possible at data densities approaching 100 MBits/mm2. Because of the all-optical nature of this technique, this method can be fully compatible with the next generation of optical computing platforms. It is anticipated that through this research program, this approach will open new vistas in the creation of subwavelength optical circuits, optical processing, and optical data storage.
Conference Committee Involvement (4)
Scanning Microscopy 2010
17 May 2010 | Monterey, California, United States
SPIE Scanning Microscopy
4 May 2009 | Monterey, United States
Nanosensors and Microsensors for Bio-Systems
11 March 2008 | San Diego, California, United States
Nano-, Micro- and Bio-Sensors and Systems
21 March 2007 | San Diego, California, United States
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