Magnetic Polaronic Exciton Emission Modulation by Temperature in Fe <sup>3+</sup> /Pb <sup>2+</sup> Co-Doped CsCdCl <sub>3</sub> Crystals
Transition metal (TM) doped semiconductors hold promise for quantum technologies, yet the photophysical nature of magnetic excitations in TM doped metal halide semiconductors remains poorly understood. Here, we found the emission bands of localized excitonic magnetic polaron (LEMP from triplet) and antiferromagnetic polaron (AMP, singlet) in Fe/Pb codoped CsCdCl<sub>3</sub> varied with temperature. Upon Fe/Pb codoping, the coexistence of antiferromagnetic and ferromagnetic states is observed. Ferromagnetically Fe<sup>3+</sup> pairs produce LEMP emission at 573 nm, while AFM Fe<sup>3+</sup> pairs produce a distinct AMP emission at 525 nm (low temperature), as so-called Zhang-Rice singlet states. Crucially, Pb<sup>2+</sup> incorporation modulates the stability and transition probability of AMP and LEMP upon temperature change, reflecting the much stronger coupling to longitudinal optical phonon for LEMP. This work reveals the dopant ions in regulating magnetic polaronic exciton behavior, thereby finding more applications in magnetic optics.
Authors
- Bingsuo Zou (ORCID: https://orcid.org/0000-0003-4561-4711)
- Xiaodong Shen (ORCID: https://orcid.org/0009-0007-7231-8914)
- Chaowei Huang
- Shuaigang Ge
- Qilin Wei (ORCID: https://orcid.org/0000-0002-1604-0600)
Institutions
- Guangxi University (CN)
- Shandong University (CN)
- Łukasiewicz Research Network - Institute of Non-Ferrous Metals (PL)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2025-10-31
- DOI
- https://doi.org/10.1021/acs.jpclett.5c03033
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00