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Method To Optimize Polymer Film Spin Coating For Polymer Led Displays, M. Cecchi, H. Smith, David Braun
Method To Optimize Polymer Film Spin Coating For Polymer Led Displays, M. Cecchi, H. Smith, David Braun
Electrical Engineering
Research and development of displays and image sensors based on semiconducting polymers require design of new polymer materials and evaluation of film properties. Application of statistical methods can expedite process development. Optimizing device performance entails determining the effect of several process parameters, necessitates numerous samples, and may consume more scarce new material than desired. Uniform film thickness, with no voids, pinholes, inhomogeneities, or particulate contamination across the substrate can improve display efficiency and uniformity. After performing and analyzing a two-cubed full-factorial experiment with three replicated center points, this paper concludes that spin velocity and polymer concentration have statistically significant effects …
State-Of-The-Art: In Polymer Light-Emitting Diodes Neome Polymer Led Mini Symposium (15–17 September 1993, Eindhoven, The Netherlands), David Braun, Adam Brown, Emiel Staring, E. W. Meijer
State-Of-The-Art: In Polymer Light-Emitting Diodes Neome Polymer Led Mini Symposium (15–17 September 1993, Eindhoven, The Netherlands), David Braun, Adam Brown, Emiel Staring, E. W. Meijer
Electrical Engineering
A symposium focused on recent progress in the field of polymer light-emitting diodes was held in Eindhoven during the period 15–17 September 1993. The following is a brief summary of highlights of the symposium. There will be no published proceedings.
Improved Efficiency In Semiconducting Polymer Light-Emitting Diodes, David Braun, A. J. Heeger, H. Kromer
Improved Efficiency In Semiconducting Polymer Light-Emitting Diodes, David Braun, A. J. Heeger, H. Kromer
Electrical Engineering
We report visible light emission from metal-polymer diodes made from semiconducting polymers, with indium-tin oxide as the “ohmic” contact, and a variety of metals as the barrier metal. Our results, which confirm the discovery by the Cambridge group [Nature347, 539 (1990)], demonstrate that light-emitting diodes can be fabricated by casting the polymer film on indium-tin oxide from solution with no subsequent polymer processing or heat treatment required. Electrical characterization reveals diode behavior with rectification ratios greater than 105 at sufficiently high voltages. Use of an electrode material with low work function leads to more than an order of magnitude improvement …