TY  - JOUR
AU  - Jin, Xue
AU  - Zhou, Minghao
AU  - Han, Jianlei
AU  - Li, Bin
AU  - Zhang, Tianyong
AU  - Jiang, Shuang
AU  - Duan, Pengfei
PY  - 2022
TI  - A new strategy to achieve enhanced upconverted circularly polarized luminescence in chiral perovskite nanocrystals
JO  - Nano Research
SN  - 1998-0124
SP  - 1047
EP  - 1053
VL  - 15
IS  - 2
AB  - Achieving large luminescence dissymmetry factors (glum) is challenging in the research field of circularly polarized luminescence (CPL). While various approaches have been developed to construct organic systems with CPL activity, there is still a lack of effective methods for fabricating CPL active inorganic materials. Herein, we propose an approach for endowing upconversion nanoparticles (UCNPs) and perovskite nanocrystal (PKNC) hybrid nanomaterials with upconverted circularly polarized luminescence (UC-CPL) activity. Chiral cesium lead bromides (CsPbBr3) PKNCs were synthesized by a chiral-ligand-assistant method. Meanwhile, UCNP could be embedded into the chiral PKNC, enabling a photon upconvesion feature to the PKNC. The embedded UCNPs in PKNCs were confirmed by electron tomography. Consequently, various CPL activities, including prompt CPL, UC-CPL, and energy transfer enhanced circularly polarized luminescence (ET-CPL), were realized. The chiral perovskite nanocrystals could reabsorb the chiral energy generated from UCNPs, showing energy transfer enhanced CPL activity with four times magnification of the circular polarization. These findings provide a meaningful strategy for designing chiral photon upconversion inorganic nanomaterials with highly efficient UC-CPL activity.
UR  - https://doi.org/10.1007/s12274-021-3594-6
DO  - 10.1007/s12274-021-3594-6