Yooji Hwang on Muck Rack

Yooji Hwang

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Articles

Enhanced optical efficiency and color purity for organic light-emitting diodes by finely optimizing parameters of nanoscale low-refractive index grid

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By Byeong-Kwon Ju, Jae Geun Kim, Yooji Hwang, Ha Hwang
| Nature Verified
Abstract To extract the confined waveguided light in organic light-emitting diodes (OLEDs), inserting a low refractive index (RI) periodic structure between the anode and organic layer has been widely investigated as a promising technology. However, the periodic-structure-based light extraction applied inside devices has been shown to severely distort spectrum and affect EL characteristics.
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Ag-fiber/graphene hybrid electrodes for highly flexible and transparent optoelectronic devices

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By Byeong-Kwon Ju, Junhee Choi, Jin-Woo Lee, Yooji Hwang
| Nature Verified
Abstract Transparent conducting electrodes (TCEs) have attracted considerable attention towards the development of flexible optoelectronic devices. In this study, mixed-dimensional TCEs are fabricated based on the two-dimensional graphene and one-dimensional electrospun metal fiber that can address the shortcomings of each electrode.
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