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Transparent organic upconversion devices are shown in a night-vision demonstration of a real object under near-infrared (NIR) illumination in the dark. An extraordinarily high current gain - reflecting the on-off switching effect - greater than 15 000 at a driving voltage of 3 V is demonstrated, indicating the high sensitivity to NIR light and potential of(More)
Defects in the near sidewall region in selective epitaxial growth of silicon have prevented its widespread use as a viable dielectric isolation technology. The main cause of these defects has been demonstrated to be thermal stress due to mismatch in the coefficient of thermal expansion between silicon and silicon dioxide. This article presents the detailed(More)
Organic materials are used in novel optoelectronic devices because of the ease and high compatibility of their fabrication processes. Here, we demonstrate a low-driving-voltage cathodic-controlled organic upconverter with a mapping application that converts near-infrared images to produce images of visible blood vessels. The proposed upconverter has a(More)
Time-of-flight (TOF) measurements typically require a sample thickness of several micrometers for determining the carrier mobility, thus rendering the applicability inefficient and unreliable because the sample thicknesses are orders of magnitude higher than those in real optoelectronic devices. Here, we use subphthalocyanine (SubPc):C70 as a(More)
The organic donor/acceptor of chloroaluminum phthalocyanine and C<sub>70</sub> as a charge generation layer (CGL) enabled a realization of near-infrared (NIR) image sensing for a highly efficient organic up-conversion device. The well-alignment energy level of CGL played an important role in controlling the conduction-path of a hole carrier for our device(More)
In this study, we compared the use of neat bathocuproine (BCP) and BCP:C60 mixed buffer layers in chloroboron subphthalocyanine (SubPc)/C60 bilayer organic photovoltaic (OPV) devices and analyzed their influence on device performance. Replacing the conventional BCP with BCP:C60 enabled manipulating the optical field distribution for optimizing the optical(More)
In this letter, the authors present a highly efficient small-molecule organic photovoltaic (OPV) with a donor-acceptor bulk-heterojunction of a novel electron donor material and C<sub>70</sub>. As a result, the OPV exhibited a highest power conversion efficiency of 6.8%, an open circuit voltage of 0.79 V, a short-circuit current density of 16.13(More)
The authors report efficient organic light-emitting diodes (OLEDs) using a high conductive transparent WAM multilayer as anode electrode [WAM=WO3 (30nm)/Ag (10 nm)/MoO2 (5 nm)], which was prepared by thermal evaporation under room temperature condition to form the smooth morphology on anode surface, leading to reduce the injection barrier between(More)
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