By a News Reporter-Staff News Editor at Nanotechnology Business Journal -- Current study results on Nanotechnology have been published. According to news reporting originating in Pohang, South Korea, by VerticalNews journalists, research stated, "Electroluminescent (EL) devices operating at alternating current (AC) electricity have been of great interest due to not only their unique light emitting mechanism of carrier generation and recombination but also their great potential for applications in displays, sensors, and lighting. Despite great success of AC-EL devices, most device properties are far from real implementation."
The news reporters obtained a quote from the research from the Pohang University of Science and Technology (POSTECH), "In particular, the current state-of-the art brightness of the solution-processed AC EL devices is a few hundred candela per square meter (cd m(-2)) and most of the works have been devoted to red and white emission. In this manuscript, we report extremely bright full color polymer AC EL devices with brightness of approximately 2300, 6000, and 5000 cd m(-2) for blue (B), green (G), and red ® emission, respectively. The high brightness of blue emission was attributed to individually networked multiwalled carbon nanotubes (MWNTs) for the facile carrier injection as well as self-assembled block copolymer micelles for suppression of interchain nonradiative energy quenching. In addition, effective FRET from a solution-blended thin film of B-G and B-G-R fluorescent polymers led to very bright green and red EL under AC voltage, respectively. The solution-processed AC-EL device also worked properly with vacuum-free Ag paste on a mechanically flexible polymer substrate."
According to the news reporters, the research concluded: "Finally, we successfully demonstrated the long-term operation reliability of our AC-EL device for over 15 h."
For more information on this research see: Extremely Bright Full Color Alternating Current Electroluminescence of Solution-Blended Fluorescent Polymers with Self-Assembled Block Copolymer Micelles. ACS Nano, 2013;7(12):10809-10817. ACS Nano can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Nano - www.pubs.acs.org/journal/ancac3)
Our news correspondents report that additional information may be obtained by contacting S.H. Cho, Pohang Univ Sci & Technol POSTECH, Dept. of Mat Sci & Engn, Pohang 790784, South Korea. Additional authors for this research include S.S. Jo, I. Hwang, J. Sung, J. Seo, S.H. Jung, I. Bae, J.R. Choi, H. Cho, T. Lee, J.K. Lee, T.W. Lee and C. Park.
Keywords for this news article include: Asia, Pohang, South Korea, Nanotechnology
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