We report on neodymium doped LaF3 nanoparticles dispersed in a photo definable polymer. Standard spin coating is used to deposit uniform thin films on a silicondioxide buffer layer, which can be photocured and developed to produce monomode active optical waveguides. Optical properties of the film are obtained using a prism coupling setup, showing low losses of the photosensitive polymer host ma...

A multi-wavelength laser is demonstrated using a dye-doped cholesteric polymer film whose reflection bandwidth is broadened with several oscillations. Due to the abrupt change of the density of state between oscillation peak and valley, each oscillation functions as a photonic band gap for generating a laser wavelength under the excitation of a pumping laser. As a result, a multiple wavelength ...

Zinc and carbon-doped InP/InGaAs heterojunction bipolar transistors (HBTs) with the same design were grown by metalorganic chemical vapor deposition (MOCVD). Dc current gain values of 36 and 16 were measured for zinc and carbon-doped HBTs, respectively, and carrier lifetimes were measured by time-resolved photoluminescnce to explain the difference. Transmission line model (TLM) analysis of carb...

DOI: 10.1002/admi.201700873 transport.[20] When interfaced with an electrolyte, redox events in conjugated poly mer films are also accompanied by film swelling or deswelling due to ion and/or solvent diffusion into or out of the films, respectively. The response times and fatigue resistances of devices that subject electroactive films to periodic cycles of oxidation/reduction are, thus, crucial...

The temperature dependence of electrical conductivity and conductivity anisotropy of FeCI3 doped stretch-oriented polyacetylene film at different doping levels were measured by using Montgomery technique. The increase of conductivity anisotropy upon doping is related to the aligned fibrillar structure and the interfibrillar contact effect. Weak temperature dependence, the slight decrease at low...

 Development of New Polymer Systems and Quantum Dots Polymer Nanocomposites for Flexible OLED Display Applications Lihua Zhao, Zhang-Lin Zhou, Zengshan Guo, Jian Pei, Samuel Mao HP Laboratories HPL-2011-68 Semi-interpenetrating polymer networks, Emissive polymers, Quantum Dots conjugated oligomer/polymers nanocomposites, OLEOs Recently, tremendous progress has been made toward application of o...

Silver doped zinc oxide nanoparticles are synthesized by a solution combustion method. The samples characterized by a variety of spectroscopic and other techniques clearly reveal the presence of silver nanoparticles as well as silver clusters. The silver in the two forms was identified by careful deconvolution of X-ray photoelectron spectral results. Their formation was also confirmed by the pr...

We have systematically examined the photoluminescence (PL) and electroluminescence (EL) behavior of blends comprising two efficient red phosphors doped, respectively, into the blue-emitting polyfluorene derivatives PF-TPA-OXD and PF-OXD. The host polymers, which contain both hole- and electron-transporting or merely electron-transporting side chains, are capable of facilitating charge injection...

Enhancement of oxygen ion conductivity in oxides is important for low-temperature (<500 °C) operation of solid oxide fuel cells, sensors and other ionotronic devices. While huge ion conductivity has been demonstrated in planar heterostructure films, there has been considerable debate over the origin of the conductivity enhancement, in part because of the difficulties of probing buried ion trans...

We investigated the surface morphologies, crystal structures, and optical characteristics of rare earth element erbium (Er)-doped MoS2 (Er: MoS2) thin films fabricated on Si substrates via chemical vapor deposition (CVD). The surface mopography, crystalline structure, light absorption property, and the photoelectronic characteristics of the Er: MoS2 films were studied. The results indicate that...