강연 제목: Plasmonic Nanocrystals for Energy Saving Smart Windows

연사 명: 김종욱 교수님  

소속: Ecole Polytechnique (France)

시간: 10월 13일(목) 13:00~

* 본 강연은 실시간 zoom을 통해서만 진행됩니다.

Plasmonic Nanocrystals for Energy Saving SmartWindows

Ecole Polytechnique - FRANCE

Jongwook Kim

Localized surface plasmon resonance (LSPR) in metal nanoparticles permits strong light absorption and near-field enhancement within the visible wavelengths (400~700nm). Recently, it was found that degenerately doped semiconductor nanocrystals could also host LSPR with their mobile charge careers. Unlike in metals, the largely variable career density in semiconductors (10 18 –10 22 /cm 3 ) extends the accessible spectral range of LSPR across the entire infrared (IR) region (700~100000nm) where solar energy is abundant, information is communicated, molecular vibrations are resonant, and biological tissues are transparent. We present how compositional and structural attributes of various semiconductor materials influence the LSPR properties that are distinguished from LSPR in metals. For instance, dopant species and their localization within a nanocrystal strongly impact the resonance band and its spectral line shape. Also, charge insertion and extraction by electrochemical route enable post-synthetic modulation of LSPR in nanocrystal films. We demonstrate application of this widely tunable LSPR for energy-saving dual-band smart windows that can selectively tailor the visible and IR solar transmissions.

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온라인 참여/ZOOM 링크 (비밀번호 4188)

https://ewha.zoom.us/j/7589143473