Improving the Five-Photon Absorption from Core-Shell Perovskite Nanocrystals
|Corresponding Author||He，Tingchao; Chen，Rui|
It is necessary to improve the action cross section (η × σ) of high-order multiphoton absorption (MPA) for fundamental research and practical applications. Herein, the core-shell FAPbBr/CsPbBr nanocrystals (NCs) were constructed, and fluorescence induced by up to five-photon absorption was observed. The value of η × σ reaches 8.64 × 10 cm s photon nm at 2300 nm, which is nearly an order of magnitude bigger than that of the core-only NCs. It is found that the increased dielectric constant promotes modulation of MPA effects, addressing the electronic distortion in high-order nonlinear behaviors through the local field effect. Meanwhile, the quasi-type-II band alignment suppresses the biexciton Auger recombination, ensuring the stronger MPA induced fluorescence. In addition, the core-shell structure can not only reduce the defect density but also promote the nonradiative energy transfer though the antenna-like effect. This work provides a new avenue for the exploitation of high-performance multiphoton excited nanomaterials for future photonic integration.
NI Journal Papers
First ; Corresponding
National Natural Science Foundation of China ; Science, Technology and Innovation Commission of Shenzhen Municipality["JCYJ20220530113015035","JCYJ20210324120204011","JCYJ20190808121211510","KQTD2015071710313656"]
|WOS Research Area|
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
|WOS Accession No|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Electrical and Electronic Engineering|
1.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,518060,China
3.The Institute of Applied Physics and Materials Engineering,University of Macau,Taipa,Avenida da Universidade, Macau,519000,Macao
|First Author Affilication||Department of Electrical and Electronic Engineering|
|Corresponding Author Affilication||Department of Electrical and Electronic Engineering|
|First Author's First Affilication||Department of Electrical and Electronic Engineering|
Zhang，Xuanyu,Xiao，Shuyu,Guo，Zhihang,et al. Improving the Five-Photon Absorption from Core-Shell Perovskite Nanocrystals[J]. Journal of Physical Chemistry Letters,2023:7581-7590.
Zhang，Xuanyu.,Xiao，Shuyu.,Guo，Zhihang.,Yuan，Baozhen.,Wang，Xiongbin.,...&Chen，Rui.(2023).Improving the Five-Photon Absorption from Core-Shell Perovskite Nanocrystals.Journal of Physical Chemistry Letters,7581-7590.
Zhang，Xuanyu,et al."Improving the Five-Photon Absorption from Core-Shell Perovskite Nanocrystals".Journal of Physical Chemistry Letters (2023):7581-7590.
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