Title | Chiral Halide Perovskite Materials for Optoelectronic and Spintronic Devices
Date | December 4, 2023
Abstract | Chiral Halide Perovskites (HPs) bring new perspectives for chiroptical applications, such as circularly polarized luminescence (CPL), and spintronic applications. For example, the emergent field of chiro-spintronics proposes to use chiral molecules as a substitute for ferromagnetic materials thanks to the spin-specific interaction between electrons and chiral molecules, a phenomenon called CISS, “Chirality-Induced Spin Selectivity”. By combining the optoelectronic properties of HP networks with chirality transfer from inserted organic cations, I aim to reveal the potential of chiral HP materials for CPL and chiro-spintronics. After an introduction about the objectives of my CNRS project, I will present the main results obtained during the first year. Starting from small chiral alkyl cations, we obtained a large series of 2D and 1D lead-halide networks. The 2D HPs have been investigated for the CISS effect, which allowed us to highlight the impact of crystal symmetry in the spin polarization ability of this class of materials [1]. With the 1D lead-halide networks, we could reveal the intrinsic and extrinsic chiroptical responses by circular dichroism measurements on thin films (unpublished results).
[1] A. Abhervé, N. Mercier, A. Kumar, T. K. Das, J. Even, C. Katan, M. Kepenekian, Adv. Mater. 2023, in press. https://doi.org/10.1002/adma.202305784
