Publication date: 15th May 2026
Halide perovskites (HPs) have emerged as a highly versatile class of semiconductors, combining strong light–matter interaction, solution processability, and a unique coupling between electronic, spin, and lattice degrees of freedom which can be chemically tailored. These properties have positioned HPs as promising candidates for spin‑based optoelectronic technologies, although toxic lead and short polarization memory currently limit their application.
In this talk, I will share recent insights from ultrafast spectroscopic studies on the role of composition and structure to control the spin-optoelectronic properties of lead-free HPs. First, I will discuss recent results on two‑dimensional hybrid organic-inorganic HPs, where the substitution of lead with germanium gives rise to strongly modified phonon coupling and emission characteristics.[1] Next, I will turn to bulk tin‑based HPs, where the reduced spin–orbit coupling relative to lead enables extended spin lifetimes.
Taken together, these studies demonstrate that lead‑free HPs constitute a promising and tunable materials platform for spin‑optoelectronic technologies.
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