[논문]Significant THz absorption in CH 3 NH 2 molecular defect-incorporated organic-inorganic hybrid perovskite thin film

Maeng, Inhee; Lee, Young Mi; Park, Jinwoo; Raga, Sonia R.; Kang, Chul; Kee, Chul-Sik; Yu, Byung Deok; Hong, Suklyun; Ono, Luis K.; Qi, Yabing; Jung, Min-Cherl; Nakamura, Masakazu

doi:10.1038/s41598-019-42359-8

[해외논문] Significant THz absorption in CH 3 NH 2 molecular defect-incorporated organic-inorganic hybrid perovskite thin film 원문보기

Scientific reports, v.9, 2019년, pp.5811 -

Maeng, Inhee (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea) , Lee, Young Mi (Beamline department, Pohang Accelerator Laboratory, POSTECH, Pohang, 37673 Republic of Korea) , Park, Jinwoo (Department of Physics, University of Seoul, Seoul, 02504 Republic of Korea) , Raga, Sonia R. (Energy Materials and Surface Sciences Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, 904-0495 Japan) , Kang, Chul (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea) , Kee, Chul-Sik (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea) , Yu, Byung Deok (Department of Physics, University of Seoul, Seoul, 02504 Republic of Korea) , Hong, Suklyun (Graphene Research Institute and Department of Physics, Sejong University, Seoul, 05006 Republic of Korea) , Ono, Luis K. (Energy Materials and Surface Sciences Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, 904-0495 Japan) , Qi, Yabing (Energy Materials) , Jung, Min-Cherl , Nakamura, Masakazu

Abstract ▼ AI-Helper

The valid strong THz absorption at 1.58 THz was probed in the organic-inorganic hybrid perovskite thin film, CH3NH3PbI3, fabricated by sequential vacuum evaporation method. In usual solution-based methods such as 2-step solution and antisolvent, we observed the relatively weak two main absorption peaks at 0.95 and 1.87 THz. The measured absorption spectrum is analyzed by density-functional theory calculations. The modes at 0.95 and 1.87 THz are assigned to the Pb-I vibrations of the inorganic components in the tetragonal phase. By contrast, the origin of the 1.58 THz absorption is due to the structural deformation of Pb-I bonding at the grain boundary incorporated with a CH3NH2 molecular defect.

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[해외논문] Significant THz absorption in CH 3 NH 2 molecular defect-incorporated organic-inorganic hybrid perovskite thin film 원문보기

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[해외논문] Significant THz absorption in CH 3 NH 2 molecular defect-incorporated organic-inorganic hybrid perovskite thin film 원문보기

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