Browsing by Author "Wang, S."

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    Exciton energy recycling from ZnO defect levels: towards electrically driven hybrid quantum-dot white light-emitting-diodes
    (Royal Society of Chemistry, 2016) Zhao, X.; Liu W.; Chen R.; Gao, Y.; Zhu B.; Demir, Hilmi Volkan; Wang, S.; Sun, H.
    An electrically driven quantum-dot hybrid white light-emitting diode is fabricated via spin coating CdSe quantum dots onto a GaN/ZnO nanorod matrix. For the first time, quantum dots are excited by fluorescence resonance energy transfer from the carriers trapped at surface defect levels. The prototype device exhibits achromatic emission, with a chromaticity coordinate of (0.327, 0.330), and correlated color temperature similar to sunlight. © 2016 The Royal Society of Chemistry.
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    Manipulating optical properties of ZnO/Ga: ZnO core-shell nanorods via spatially tailoring electronic bandgap
    (Wiley-VCH Verlag, 2015) Zhao, X.; Gao, Y.; Wang Y.; Demir, Hilmi Volkan; Wang, S.; Sun, H.
    Enhancing optical and electrical properties of ZnO nanostructures via surface doping is demonstrated by Ga:ZnO–ZnO core–shell nanorods, which are grown by a genetic two-step method. Low-temperature photoluminescence and X-ray photoelectron spectroscopy prove the n + shell significantly suppresses the surface-related recombination by spatially modulating the electronic band structure. The study provides a significant physical insight in designing optoelectronic devices.