Kippelen, Bernard

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Fabrication of a blue M x N pixel organic light-emitting diode video display incorporating a thermally stable emitter

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

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

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.