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Device Fabrication: The flexible OELD was prepared onto the PI substrate with the ITO film (anode) grown at 150 C by an rf magnetron sputtering method. The OELD prepared in the present study consisted of a typical organic double layer structure, having hole-transporting and electron-transporting/emitting layers between two electrodes: PI (250 lm)/ITO (120(More)
The current-voltage characteristics of organic heterojunctions ͑HJs͒ are often modeled using the generalized Shockley equation derived for inorganic diodes. However, since this description does not rigorously apply to organic semiconductor donor-acceptor ͑D-A͒ HJs, the extracted parameters lack a clear physical meaning. Here, we derive the current(More)
—We report the integration of organic light emitting devices (OLED's) and amorphous Si (a-Si) thin-film transistors (TFT's) on both glass, and unbreakable and lightweight thin stainless steel foil substrates. The doped-polymer OLED's were built following fabrication of driver TFT's in a stacked structure. Due to the opacity of the steel substrate,(More)
—The challenges to realizing diode lasers based on thin films of organic semiconductors are primarily related to low charge carrier mobility in these materials. This not only limits the thickness of organic films to ≤100 nm in electrically pumped devices, but it also leads to changes in the optical properties of organic films induced by the large number of(More)
Results are presented from polymer/molecular organic heterostructure light emitting diodes composed of a layer of the conjugated conducting polymer poly͑p-phenylene vinylene͒ ͑PPV͒, and a layer of fluorescent molecular compound tris͑8-hydroxy͒ quinoline aluminum ͑Alq͒. The external quantum efficiency of these heterostructure LEDs is ϳ0.1%, which is over one(More)
We demonstrate the modeling of optical response of exciton-polarons based on the well established Holstein Hamiltonian to model coupled exciton-phonon systems in organic molecular chains. Our approach uses Green's functions to compute the density of states and the linear optical susceptibility, and thus eliminates the conventional and computationally(More)
This paper discusses the latest developments towards a commercial blue phosphorescent organic light emitting device (PHOLED™) technology. Progress towards achieving a high efficiency, long-lived saturated blue PHOLED is discussed. First, a high efficiency (20% EQE, 45 cd/A), light blue (0.17, 0.39) PHOLED is presented. Next, long-lived blue PHOLEDs having(More)
  • J R Sheats, H Antoniadis, +33 authors S Chen
height. Assuming a linear relationship between thickness and absorption, as well as assuming a direct relationship between absorption and emission, the fluorescence signal, measured by NSOM, is expected to increase by the same percentage. The increase in fluorescence between the tallest feature and the background signal of 13 kcps is 13 kcps. Although this(More)
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