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제129회 대한화학회 학술발표회, 총회 및 기기전시회 Abnormal spatial heterogeneity in efficient perovskite solar cells and ultrasensitive near-infrared circularly polarized light perovskite detector using chiral plasmonic nanoparticles

2022년 1월 17일 22시 28분 44초
PHYS2-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 10시 : 40분
Physical Chemistry - Recent Advances in Physical Chemistry
저자 및
Jong Woo Lee
Department of Applied Chemistry, University of Seoul, Korea
Two-dimensional perovskite photovoltaics have received substantial attention because of their excellent stability. In particular, it has been reported that triple-cation perovskite solar cells have higher performance and improved charge-carrier dynamics than mono-cation solar cells. Herein, we reported that abnormal heterogeneities ranging from the lateral long-range to local sub-grain scale with suppressed lattice vibrations significantly promoted charge-carrier dynamics of triple-cation perovskites [1].
As another topic, we demonstrated highly sensitive zero-biased near-infrared (NIR) circularly polarized light (CPL) detector with superior flexibility and durability [2]. In order to overcome the requirement of subsidiary optics in conventional CPL detectors, chiral molecule-incorporated low-dimensional perovskites have received attention due to the direct CPL detection capability. However, most CPL perovskite detectors confine chiroptical responses to the ultraviolet or short-wavelength visible light. Here, incorporation of chiral plasmonic gold nanoparticles (AuNPs) into the Sn-mixed perovskite enabled remarkable chirality in the NIR region with a high anisotropy factor of responsivity. Our results could provide one way to develop the ultrasensitive self-powered CPL detectors which could be used for next-generation chiral optoelectronics.
[1] Energy & Environmental Science, 14 (9), 4915-4925 (2021) “Abnormal Spatial Heterogeneity Governing Charge-Carrier Mechanism in Efficient Ruddlesden-Popper Perovskite Solar Cells”
[2] Advanced Science, 2104598 (2022) “Ultrasensitive Near-Infrared Circularly Polarized Light Detection Using 3D Perovskite Embedded with Chiral Plasmonic Nanoparticles”