Journal
CHEMICAL PHYSICS LETTERS
Volume 835, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2023.140952
Keywords
NLO for halide perovskites; perovskite CsPbI 3 nanorods with different; aspect ratios; Single and two-photon absorption cross-section; Quantum confinement effect
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This study investigates the influence of aspect ratio and quantum confinement on the single-photon and two-photon absorption cross-section of perovskite CsPbI3 nanorods. Experimental data shows that CsPbI3 nanorods have an extremely high two-photon absorption cross-section, significantly surpassing organic chromophores and other CsPbBr3 nanocrystals. Moreover, adjusting the aspect ratio can significantly enhance the absorption ability. Additionally, the study also reveals a moderate quantum confinement effect on the single-photon and two-photon absorption cross-section of the nanorods.
Herein, we investigate the influence of aspect ratio and quantum confinement on the single-photon (01) and twophoton absorption cross-section (02) for perovskite CsPbI3 nanorod (NR). Notably, experimentally measured data show extremely high 02 for CsPbI3 NR (10.8 x 107 GM) which is five orders of magnitude higher than organic chromophores, and two order of magnitude higher than CsPbBr3 nanocrystals. Moreover, 02 for NRs can be enhanced by two-orders of magnitude by varying the aspect ratio and 01 enhances linearly with aspect ratios. Furthermore, experimental data show moderate quantum confinement effect on the volume-normalized 01 and 02 for nanorods.
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