Kippelen, Bernard

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Now showing 1 - 3 of 3
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    Fabrication of a blue M x N pixel organic light-emitting diode video display incorporating a thermally stable emitter
    (Georgia Institute of Technology, 2009-04) Haldi, Andreas ; Kim, Jung B. ; Domercq, Benoit ; Kulkarni, Abhishek P. ; Barlow, Stephen ; Gifford, Angela P. ; Jenekhe, Samson A. ; Marder, Seth R. ; Kippelen, Bernard
    A 7x11 pixel blue OLED display was fabricated using a patterned indium-tin-oxide (ITO) substrate. The fabrication process for an M x N pixel organic light-emitting diode (OLED) video display including an electrical insulating layer and a physical pixel separator layer is presented. An efficient and thermally stable blue fluorescent organic material, 6, 6'-bis((2-p-biphenyl)-4-phenylquinoline) (B2PPQ), was used in combination with an evaporated hole-transport small molecule with a high ionization potential.
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    Direct imaging through scattering media by use of efficient third-harmonic generation in organic materials
    (Georgia Institute of Technology, 2004-11) Ramos-Ortiz, Gabriel ; Cha, Myoungsik ; Kippelen, Bernard ; Walker, Gregory A. ; Barlow, Stephen ; Marder, Seth R.
    We report on real-time, time-gated, direct imaging through scattering media with an attenuation of 14 mean-free paths by use of third-harmonic generation in the eye-safe and telecommunication-compatible near-IR spectral region (1550 nm).
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    Video-rate compatible photorefractive polymers with stable dynamic properties under continuous operation
    (Georgia Institute of Technology, 2004-09) Fuentes-Hernandez, Canek ; Thomas, Jayan ; Termine, Roberto ; Meredith, Gerald ; Peyghambarian, Nasser ; Kippelen, Bernard ; Barlow, Stephen ; Walker, Gregory A. ; Marder, Seth R. ; Yamamoto, Michiharu ; Cammack, Kevin ; Matsumoto, Kenji
    We report on photorefractive polymer composites that exhibit stable dynamic properties under continuous operation. These materials are based on a bis-triarylamine side-chain polymer matrix with a low ionization potential. The evolution of the response time for exposures up to 4 kJ∕cm² was studied and compared with that obtained in poly(n-vinylcarbazole) (PVK) based composites. In the composites, operational stability is combined with video-rate compatible dynamics, large dynamic range at moderate fields, and long shelf lifetimes.