Two-Photon Absorption-Based Upconverted Circularly Polarized Luminescence Generated in Chiral Perovskite Nanocrystals

Wenjie Chen; Shuai Zhang; Minghao Zhou; Tonghan Zhao; Xujin Qin; Xinfeng Liu; Minghua Liu; Pengfei Duan

doi:10.1021/acs.jpclett.9b01224

Two-Photon Absorption-Based Upconverted Circularly Polarized Luminescence Generated in Chiral Perovskite Nanocrystals

J Phys Chem Lett. 2019 Jun 20;10(12):3290-3295. doi: 10.1021/acs.jpclett.9b01224. Epub 2019 Jun 3.

Authors

Wenjie Chen^{1

2

3}, Shuai Zhang^{4

3}, Minghao Zhou², Tonghan Zhao^{2

3}, Xujin Qin², Xinfeng Liu^{4

3}, Minghua Liu^{1

2

3}, Pengfei Duan^{2

3}

Affiliations

¹ Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics , Institute of Chemistry, Chinese Academy of Sciences , No. 2 ZhongGuanCun BeiYiJie , 100190 Beijing , P.R. China.
² CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , 100190 Beijing , P.R. China.
³ University of Chinese Academy of Sciences , Beijing 100049 , P.R. China.
⁴ CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Standardization and Measurement for Nanotechnology , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , 100190 Beijing , P.R. China.

PMID: 31146530
DOI: 10.1021/acs.jpclett.9b01224

Abstract

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 α-octylamine-modified cesium lead bromides perovskite nanocrystals exhibited TP-UCPL with a two-photon absorption cross section at 800 nm (σ_{2,800 nm}) up to 3.68 × 10⁴ GM and luminescence dissymmetric factor ( g_lum) up to 7.0 × 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.