Project R-17037

Evaluating Chirality Transfer Mechanisms in Hybrid Perovskites for Circularly Polarized Light Detection (Research)

The success of hybrid perovskites (HOIPs) as solar cell materials has sparked the exploration of this versatile class of hybrid materials for other optoelectronic applications. Their recent extension into chiral hybrid perovskites (CHP), incorporating chiral organic cations, enables selective detection of left- or right-handed circularly polarized light. It opens pathways to compact circularly polarized photodetectors (CP-PDs) for optical imaging, remote sensing, and optical communication. However, direct chirality transfer via chiral cations limits compositional flexibility and limits the absorption of the 2D CHPs to the UV-visible region. A newly introduced strategy, remote chirality transfer, makes use of chiral additives bound to the surface of the achiral 2D HOIPs to induce asymmetric distortions. This approach offers unique design freedom, but its effectiveness in CP-PDs and its comparison with direct chirality transfer remain unexplored. My PhD project will provide the first in-depth comparison of direct and remote chirality transfer in 2D HOIPs integrated into 2D/3D heterojunctions. By combining controlled material synthesis with structural, chiroptical and optoelectronic characterization, this project will reveal how each mechanism governs charge transport, circular dichroism, and CP-PD performance, including absorption range and stability. The resulting structure-property-performance relationships will guide the rational design of next-generation CHP materials.

01 November 2026 - 31 October 2030