期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 10, 期 12, 页码 3290-3295出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b01224
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资金
- National Natural Science Foundation of China [91856115, 51673050]
- Ministry of Science and Technology of the People's Republic of China [2017YFA0206600, 2016YFA0203400]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH044]
- New Hundred-Talent Program research fund of the Chinese Academy of Sciences
Upconverted circularly polarized luminescence (UCPL) processes have attracted great interest, because the chiroptical properties could be expressed in different photophysical processes. In this Letter, the first example of two-photon absorption-based upconverted circularly polarized luminescence (TP-UCPL) is demonstrated. The chiral alpha-octylamine-modified cesium lead bromides perovskite nanocrystals exhibited TP-UCPL with a two-photon absorption cross section at 800 nm (sigma(2,800 nm)) up to 3.68 x 10(4) GM and luminescence dissymmetric factor (g(lum)) up to 7.0 x 10(-3). Depending on the molecular chirality of the capping ligands, the TP-UCPL sense can be selected and the mirror-imaged CPL is obtained. It is envisaged that this approach will afford a new viewpoint for designing UCPL processes.
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