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  1. No Access

    Article

    Composition-dependent trapezoidal quantum barrier effect on efficiency droop in GaN-based light-emitting diodes

    We systematically investigated GaN-based light-emitting diodes (LEDs) with composition-dependent trapezoidal quantum barriers (QBs) to analyze the efficiency droop behavior at low and high current densities. T...

    Sang Ryung Kim, Semi Oh, Sanghoon Jung… in Journal of the Korean Physical Society (2023)

  2. No Access

    Article

    Optical and Electrical Properties of Multilayer Grid Electrodes for Highly Durable Transparent Conductive Electrodes

    We report on the optical and electrical properties of MgZnO/Ag/MgZnO (MAM) grid electrodes grown at room temperature; these are proposed as an alternative to metal-based grid electrodes to meet the requirement...

    Hyo-Ju Lee, Ki-Yeop Cho, Semi Oh… in International Journal of Precision Enginee… (2021)

  3. No Access

    Article

    Explicit and implicit stock investment: Differences in psychological characteristics and risky behavior between college students majoring in financial engineering or business

    This study (a) investigates dispositional attributes regarding the risk-related personality, attitude, and behavior of college students majoring in financial engineering (FE-major group) and business (business...

    Junsu Park, Do-Yeong Kim, Semi Oh in Current Psychology (2020)

  4. No Access

    Article

    Unified switching mechanism for reversible change between unipolar and bipolar switching modes of oxide resistive switching memory devices

    We demonstrate the coexistence of the unipolar and bipolar switching behaviors in a single oxide resistive device composed of Pt-CuO0.8-W structure and we reveal the switching mechanism by the comprehensive analy...

    Sang-Jun Choi, Ki-Hong Kim, Woo-Young Yang, Sohyeon Kim, Semi Oh… in Applied Physics A (2017)

  5. Article

    Open Access

    The determinants of stroke phenotypes were different from the predictors (CHADS2 and CHA2DS2-VASc) of stroke in patients with atrial fibrillation: a comprehensive approach

    Atrial fibrillation (AF) is a leading cause of fatal ischemic stroke. It was recently reported that international normalized ratio (INR) levels were associated with infarct volumes. However, factors other than...

    Semi Oh, Suk Jae Kim, Soo-Kyoung Ryu, Gyeong-Moon Kim, Chin Sang Chung… in BMC Neurology (2011)

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