Publication date: 15th December 2025
Chiral hybrid organic-inorganic perovskites (c-HOIPs) have emerged as a class of semiconductors that couple unique chiroptical properties with spin-polarized charge transport. Achieving long spin lifetimes and high charge carrier mobilities simultaneously is key to realizing their potential in spin-optoelectronic applications. While monolayer c-HOIPs exhibit large circular dichroism and photoluminescence dissymmetry, extending chirality into quasi-2D c-HOIPs with improved transport remains an open challenge. In this talk, I will discuss our recent efforts to address this challenge by tuning the layer-number (n-value) of quasi-2D c-HOIPs. By systematically varying the layer number, we uncover how structural confinement and electronic coupling govern their chiroptical response, spin relaxation, and charge carrier mobility. I will also highlight how these insights translate into device performance including circularly polarized light detection. In addition, I will introduce our recent demonstration of inverse chirality induced spin selectivity using terahertz (THz) emission spectroscopy as a non-contact probe of spin to charge conversion. The THz emission results directly reveal chirality dependent phase reversals, offering a new route to probe spin polarization in 2D c-HOIPs. These results establish 2D chiral hybrid organic-inorganic perovskites as model systems for controlling spin-to-charge conversion and for exploring the interplay between chirality, spin, and charge transport in next-generation spin-optoelectronic materials.
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