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Antinode

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Chih-hao Chang – One of the best experts on this subject based on the ideXlab platform.

  • 35.4: Enhancing Light Outcoupling of Organic Light‐Emitting Devices by Locating Emitters around the Second Antinode of the Reflective Metal Electrode
    SID Symposium Digest of Technical Papers, 2006
    Co-Authors: Chun-liang Lin, Ting-yi Cho, Chih-hao Chang

    Abstract:

    Due to generally low conductivity and low carrier mobilities of organic materials, organic light-emitting devices (OLEDs) are typically optimized for light outcoupling by locating emitters around the first Antinode of the metal electrode. In this paper, by utilizing device structures containing conductive doping, we investigate theoretically and experimentally the influences of the location of emitters relative to the metal electrode on OLED emission, and show that substantial enhancement in light outcoupling (1.2 times) or forward luminance (1.6 times) could be obtained by placing emitters around the second Antinode instead of the first Antinode. Depending on the detailed condition, the second-Antinode device may also give more directed emission as often observed in strong-micrcavity devices yet without suffering color shift with viewing angles.

  • 35 4 enhancing light outcoupling of organic light emitting devices by locating emitters around the second Antinode of the reflective metal electrode
    SID Symposium Digest of Technical Papers, 2006
    Co-Authors: Chun-liang Lin, Ting-yi Cho, Chih-hao Chang

    Abstract:

    Due to generally low conductivity and low carrier mobilities of organic materials, organic light-emitting devices (OLEDs) are typically optimized for light outcoupling by locating emitters around the first Antinode of the metal electrode. In this paper, by utilizing device structures containing conductive doping, we investigate theoretically and experimentally the influences of the location of emitters relative to the metal electrode on OLED emission, and show that substantial enhancement in light outcoupling (1.2 times) or forward luminance (1.6 times) could be obtained by placing emitters around the second Antinode instead of the first Antinode. Depending on the detailed condition, the second-Antinode device may also give more directed emission as often observed in strong-micrcavity devices yet without suffering color shift with viewing angles.

  • Enhancing light outcoupling of organic light-emitting devices by locating emitters around the second Antinode of the reflective metal electrode
    Applied Physics Letters, 2006
    Co-Authors: Chun-liang Lin, Ting-yi Cho, Chih-hao Chang

    Abstract:

    Due to generally low conductivity and low carrier mobilities of organic materials, organic light-emitting devices (OLEDs) are typically optimized for light outcoupling by locating emitters around the first Antinode of the metal electrode. In this letter, by utilizing device structures containing conductive doping, we investigate theoretically and experimentally the influences of the location of emitters relative to the metal electrode on OLED emission, and show that substantial enhancement in light outcoupling (1.2 times) or forward luminance (1.6 times) could be obtained by placing emitters around the second Antinode instead of the first Antinode. Depending on the detailed condition, the second-Antinode device may also give more directed emission as often observed in strong-microcavity devices yet without suffering a color shift with viewing angles.

Kyriacos C Nicolaou – One of the best experts on this subject based on the ideXlab platform.

  • total synthesis of calicheamicin gamma 1i 2 development of an enantioselective route to calicheamicinone
    Journal of the American Chemical Society, 1993
    Co-Authors: Adrian L. Smith, Emmanouil N Pitsinos, C.k. Hwang, Hiroyuki Saimoto, Gerard R. Scarlato, T Suzuki, Kyriacos C Nicolaou

    Abstract:

    The first enantioselective total synthesis of (-)-calicheamicinone (3), the naturally occurring antipode of the calicheamicin aglycon, has been achieved

Ivett A. Leyva – One of the best experts on this subject based on the ideXlab platform.

  • The Response of Cryogenic H2/O2 Coaxial Jet Flames to Acoustic Disturbances (POST PRINT)
    , 2015
    Co-Authors: David Forliti, Ivett A. Leyva, Alireza Badakhshan, Jeffrey L Wegener, Douglas G Talley

    Abstract:

    Abstract : An experimental study has been conducted to explore the coupling between a coaxial gaseous hydrogen / liquid oxygen jet flame and transverse acoustic perturbations. A variety of chamber conditions including acoustic frequency, amplitude, and the location of the pressure node / Antinode with respect to the flame were examined. The flame response was documented using high-speed imaging including backlit visualization and unfiltered chemiluminescence. Dynamic mode decomposition was used to isolate the spatial structure of the flame response at the forcing frequency. The results indicate that the flame response to forcing is qualitatively similar to previous results of nonreacting coaxial jet flows; the pressure node forcing appears to generate in-plane flapping of the flame while pressure Antinode forcing induces a helical structure in the flame.

  • The Response of Cryogenic H2/O2 Coaxial Jet Flames to Acoustic Disturbances
    53rd AIAA Aerospace Sciences Meeting, 2015
    Co-Authors: David Forliti, Ivett A. Leyva, Alireza Badakhshan, Jeffrey L Wegener, Doug Talley

    Abstract:

    An experimental study has been conducted to explore the coupling between a coaxial gaseous hydrogen / liquid oxygen jet flame and transverse acoustic perturbations. A variety of chamber conditions including acoustic frequency, amplitude, and the location of the pressure node / Antinode with respect to the flame were examined. The flame response was documented using high-speed imaging including backlit visualization and unfiltered chemiluminescence. Dynamic mode decomposition was used to isolate the spatial structure of the flame response at the forcing frequency. The results indicate that the flame response to forcing is qualitatively similar to previous results of nonreacting coaxial jet flows; the pressure node forcing appears to generate in-plane flapping of the flame while pressure Antinode forcing induces a helical structure in the flame.

  • Cryogenic High-Pressure Shear-Coaxial Jets Exposed to Transverse Acoustic Forcing
    50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012
    Co-Authors: Sophonias Teshome, Ivett A. Leyva, Douglsa Talley, Ann Karagozian

    Abstract:

    Abstract : This experimental study investigated the response of dynamic flow structures of cryogenic coaxial nitrogen jets to pressure perturbations due to transverse acoustic forcing at a pressure Antinode (PAN). The role of injector exit geometry on the flow response was examined using two shear coaxial injectors with different outer-to-inner jet area ratios. Flow conditions for varying outer-to-inner jet momentum flux ratios (0.5 – 20), and acoustic pressure Antinode at the jet axis location, under subcritical (reduced pressure of 0.44) chamber pressures were considered. Dark-core length measurements of the dense inner jet were used to indicate the extent of mixing under different flow conditions and exit geometries. A basic application of proper orthogonal decomposition on the intensity fluctuation of high-speed images enabled the extraction of the spatial and temporal characteristics of the dominant flow structures that existed in the flow field during exposure to acoustic forcing. Regardless of injector geometry or pressure regime, low outer-to-inner momentum flux ratio flows were found to be responsive to acoustic pressure Antinode forcing. With increasing momentum flux ratio, however, the flow response to forcing depended on the injector geometry.