Home  About us  Contact
 

Excellent Characteristics (excellent + characteristic)

Distribution by Scientific Domains
Polymers and Materials Science50%

Selected Abstracts

Vertical-type organic device using thin-film ZnO transparent electrode

ELECTRICAL ENGINEERING IN JAPAN, Issue 2 2007
Hiroyuki Iechi
Abstract We propose a double heterojunction organic light-emitting diode (OLED) using a zinc oxide (ZnO) film, which works as a transparent and electron injection layer. The crystal structure of the ZnO films as a function of Ar/O2 flow ratio and the basic characteristics of the OLED depending on the ZnO sputtering conditions are investigated. Excellent characteristics of the novel OLED were obtained, as high as 470 cd/m2 at 22 V and 7.6 mA/cm2. The results obtained here demonstrate that the vertical organic light-emitting transistor (OLET) using a ZnO layer as an electron injection layer is promising as a key element for flexible sheet displays. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 158(2): 49,55, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20151 [source]

Doping of the Metal Oxide Nanostructure and its Influence in Organic Electronics

ADVANCED FUNCTIONAL MATERIALS, Issue 8 2009
Mi-Hyae Park
Abstract Synthesizing metal oxides through the sol,gel process provides a convenient way for forming a nanostructured layer in wide band gap semiconductors. In this paper, a unique method of introducing dopants into the metal oxide semiconductor is presented. The doped TiO2 is prepared by adding a Cs2CO3 solution to a nanocrystalline TiO2 solution that is synthesized via a non-hydrolytic sol,gel process. The properties of the TiO2:Cs layer are investigated and the results show stable nanostructure morphology. In addition to providing morphological stability, Cs in TiO2 also gives rise to a more desirable work function for charge transport in organic electronics. Polymer solar cells based on the poly(3-hexylthiophene) (P3HT): methanofullerene (PC70BM) system with the addition of a TiO2:Cs interfacial layer exhibit excellent characteristics with a power conversion efficiency of up to 4.2%. The improved device performance is attributed to an improved polymer/metal contact, more efficient electron extraction, and better hole blocking properties. The effectiveness of this unique functionality also extends to polymer light emitting devices, where a lower driving voltage, improved efficiency, and extended lifetime are demonstrated. [source]

Low Thresholds in Polymer Lasers on Conductive Substrates by Distributed Feedback Nanoimprinting: Progress Toward Electrically Pumped Plastic Lasers

ADVANCED MATERIALS, Issue 7 2009
Ebinazar B. Namdas
A light-emitting transistor (LEFET) architecture with a distributed feedback (DFB) resonator structure nanoimprinted into the gain medium offers a route to achieving an electrically pumped plastic laser. A 2D DFB laser provides lower lasing thresholds than a 1D DFB laser under identical conditions. The 2D DFB lasers exhibit excellent characteristics with lasing threshold and slope efficiency of 32,nJ/pulse and 1.2%, respectively. [source]

Vertically Aligned Antimony Nanowires as Solid-State pH Sensors

CHEMPHYSCHEM, Issue 1 2007
Pai-Chun Chang
Antimony pH nanoelectrodes based on Sb nanowire arrays are fabricated by a template-assisted electrodeposition technique (see picture). Based on their highly linear response to hydrogen ion (H+) concentration, the Sb nanowire array demonstrates excellent characteristics for pH detection and offers the possibility of use in nanoscale solid-state sensing devices for biological systems. [source]