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Here I provide a summary of my group’s research on the photophysics of nanocrystal quantum dots and briefly discuss multipeak luminescence structures related to excitons, trions, and biexcitons in halide perovskite nanocrystals.
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Hiroshige, N.; Ihara, T.; Kanemitsu, Y. Simultaneously measured photoluminescence lifetime and quantum yield of two-photon cascade emission on single CdSe/ZnS nanocrystals. Phys. Rev. B 2017, 95, 245307.
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Ohara, K.; Yamada, T.; Tahara, H.; Aharen, T.; Hirori, H.; Suzuura, H.; Kanemitsu, Y. Excitonic enhancement of optical nonlinearities in perovskite CH3NH3PbCl3 single crystals. Phys. Rev. Mater. 2019, 3, 111601.
Ohara, K.; Yamada, T.; Aharen, T.; Tahara, H.; Hirori, H.; Suzuura, H.; Kanemitsu, Y. Impact of spin-orbit splitting on two-photon absorption spectra in a halide perovskite single crystal. Phys. Rev. B 2021, 103, L041201.
Yumoto, G.; Hirori, H.; Sekiguchi, F.; Sato, R.; Saruyama, M.; Teranishi, T.; Kanemitsu, Y. Strong spin–orbit coupling inducing Autler–Townes effect in lead halide perovskite nanocrystals. Nat. Commun. 2021, 12, 3026.
Yarita, N.; Tahara, H.; Ihara, T.; Kawawaki, T.; Sato, R.; Saruyama, M.; Teranishi, T.; Kanemitsu, Y. Dynamics of charged excitons and biexcitons in CsPbBr3 perovskite nanocrystals revealed by femtosecond transient-absorption and single-dot luminescence spectroscopy. J. Phys. Chem. Lett. 2017, 8, 1413–1418.
Yarita, N.; Tahara, H.; Saruyama, M.; Kawawaki, T.; Sato, R.; Teranishi, T.; Kanemitsu, Y. Impact of postsynthetic surface modification on photoluminescence intermittency in formamidinium lead bromide perovskite nanocrystals. J. Phys. Chem. Lett. 2017, 8, 6041–6047.
Yarita, N.; Aharen, T.; Tahara, H.; Saruyama, M.; Kawawaki, T.; Sato, R.; Teranishi, T.; Kanemitsu, Y. Observation of positive and negative trions in organic–inorganic hybrid perovskite nanocrystals. Phys. Rev. Mater. 2018, 2, 116003.
Kanemitsu, Y. Trion dynamics in lead halide perovskite nanocrystals. J. Chem. Phys. 2019, 151, 170902.
Masada, S.; Yamada, T.; Tahara, H.; Hirori, H.; Saruyama, M.; Kawawaki, S.; Sato, R.; Teranishi, T.; Kanemitsu, Y. Effect of A-site cation on photoluminescence spectra of single lead bromide perovskite nanocrystals. Nano Lett. 2020, 20, 4022–4028.
Cho, K.; Tahara, H.; Yamada, T.; Suzuura, H.; Tadano, T.; Sato, R.; Saruyama, M.; Hirori, H.; Teranishi, T.; Kanemitsu, Y. Exciton–phonon and trion–phonon couplings revealed by photoluminescence spectroscopy of single CsPbBr3 perovskite nanocrystals. Nano Lett. 2022, 22, 7674–7681.
Cho, K.; Sato, T.; Yamada, T.; Sato, R.; Saruyama, M.; Teranishi, T.; Suzuura, H.; Kanemitsu, Y. Size dependence of Trion and biexciton binding energies in lead halide perovskite nanocrystals. ACS Nano 2024, 18, 5723–5729.
Cho, K.; Yamada, T.; Saruyama, M.; Sato, R.; Teranishi, T.; Kanemitsu, Y. Temperature dependence of photoluminescence spectrum of single lead halide perovskite nanocrystals: Effect of size on the phase transition temperature. J. Chem. Phys. 2023, 158, 201104.
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Nakahara, S.; Tahara, H.; Yumoto, G.; Kawawaki, T.; Saruyama, M.; Sato, R.; Teranishi, T.; Kanemitsu, Y. Suppression of trion formation in CsPbBr3 perovskite nanocrystals by postsynthetic surface modification. J. Phys. Chem. C 2018, 122, 22188–22193.
Nagai, M.; Tomioka, T.; Ashida, M.; Hoyano, M.; Akashi, R.; Yamada, Y.; Aharen, T.; Kanemitsu, Y. Longitudinal optical phonons modified by organic molecular cation motions in organic-inorganic hybrid perovskites. Phys. Rev. Lett. 2018, 121, 145506.
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Ono, M.; Nishihara, T.; Ihara, T.; Kikuchi, M.; Tanaka, A.; Suzuki, M.; Kanemitsu, Y. Impact of surface ligands on the photocurrent enhancement due to multiple exciton generation in close-packed nanocrystal thin films. Chem. Sci. 2014, 5, 2696–2701.
Tahara, H.; Sakamoto, M.; Teranishi, T.; Kanemitsu, Y. Collective enhancement of quantum coherence in coupled quantum dot films. Phys. Rev. B 2021, 104, L241405.
Tahara, H.; Sakamoto, M.; Teranishi, T.; Kanemitsu, Y. Coherent electronic coupling in quantum dot solids induces cooperative enhancement of nonlinear optoelectronic responses. Nat. Nanotechnol 2024, 19, 744–750.
Tahara, H.; Sakamoto, M.; Teranishi, T.; Kanemitsu, Y. Harmonic quantum coherence of multiple excitons in PbS/CdS core-shell nanocrystals. Phys. Rev. Lett. 2017, 119, 247401.
Tahara, H.; Sakamoto, M.; Teranishi, T.; Kanemitsu, Y. Quantum coherence of multiple excitons governs absorption cross-sections of PbS/CdS core/shell nanocrystals. Nat. Commun. 2018, 9, 3179.
Nakagawa, K.; Hirori, H.; Sato, S. A.; Tahara, H.; Sekiguchi, F.; Yumoto, G.; Saruyama, M.; Sato, R.; Teranishi, T.; Kanemitsu, Y. Size-controlled quantum dots reveal the impact of intraband transitions on high-order harmonic generation in solids. Nat. Phys. 2022, 18, 874–878.
Hirori, H.; Sato, S. A.; Kanemitsu, Y. High-order harmonic generation in solids: The role of intraband transitions in extreme nonlinear optics. J. Phys. Chem. Lett. 2024, 15, 2184–2192.
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