Issue 44, 2022

Impact of crystal growth diversity on magneto-photoluminescence and circular dichroism in chiral lead halide perovskites

Abstract

Chiral-induced magneto-photoluminescence (magneto-PL) is a newly raised magneto-optical phenomenon, where photoluminescence intensity can be effectively manipulated by magnetic fields and material helicity. By far, little is known regarding the impact of crystallographic orientations on chiral-induced magneto-PL and circular dichroism (CD) for solution-made polycrystalline chiral lead halide perovskites (LHPs). By tuning weight percentages (wt%) rationally for precursor solutions in the work, we found that large magneto-PL (−13.2%) with strong tunability via polarized photoexcitation is highly decided by the crystallographic orientations for the chiral LHPs. The large effect stems from the effectiveness of magnetic field modulation to excitonic fine structures. We also found that diploe-allowed excitonic transitions and the CD characters could be dramatically influenced by crystallinities. Thus, a full understanding of its growth mode and optical properties is of paramount importance for achieving large magneto-PL with strong tunability. The work opens a new avenue for chiroptical applications.

Graphical abstract: Impact of crystal growth diversity on magneto-photoluminescence and circular dichroism in chiral lead halide perovskites

Supplementary files

Article information

Article type
Paper
Submitted
09 ستمبر 2022
Accepted
20 اکتوٗبر 2022
First published
20 اکتوٗبر 2022

J. Mater. Chem. C, 2022,10, 16706-16713

Impact of crystal growth diversity on magneto-photoluminescence and circular dichroism in chiral lead halide perovskites

R. Pan, J. Hu, S. Tao, L. Kan, H. Yu and K. Wang, J. Mater. Chem. C, 2022, 10, 16706 DOI: 10.1039/D2TC03810B

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