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Highly Enhanced Normalized‐Volume Multiphoton Absorption in CsPbBr 3 2D Nanoplates
Author(s) -
He Tingchao,
Li Junzi,
Qiu Xin,
Xiao Shuyu,
Yin Cheng,
Lin Xiaodong
Publication year - 2018
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201800843
Subject(s) - materials science , absorption (acoustics) , perovskite (structure) , nanocrystal , quantum dot , potential well , photonics , optoelectronics , chemical physics , nanotechnology , crystallography , composite material , chemistry
Abstract All‐inorganic perovskite nanocrystals (NCs) have attracted considerable attention due to their extensive photonic and optoelectronic properties. These NCs are shown to exhibit strong multiphoton absorption (MPA). However, studies on the MPA properties of perovskite NCs are only conducted on weakly confined perovskite cubic NCs, while the relevant influences of the geometry are never discussed. To the best of knowledge, this report describes the first comparison of the MPA properties of CsPbBr 3 2D nanoplates (2D NPs) and cubic NCs. Based on the experimental results, it can be concluded that stronger quantum confinement effect of 2D NPs will strongly enhance their MPA with outstanding normalized‐volume two‐ and three‐photon absorption cross sections up to 1561 GM nm −3 and 7.2 × 10 −78 cm 6 s 2 photon −2 nm −3 , respectively. This work demonstrates that CsPbBr 3 2D NPs are good candidates for exploring the influences of quantum confinement on MPA properties of perovskite NCs, which are also highly suitable for the applications of multiphoton imaging and nonlinear optoelectronics.