Effect of chirality on the optical properties of layered hybrid perovskite R- and S-α-methylbenzylammonium lead iodide

Tariq Sheikh; Shabnum Maqbool; Parikshit Kumar Rajput; Pankaj Mandal; Angshuman Nag

doi:10.1039/d2cc01811j

Effect of chirality on the optical properties of layered hybrid perovskite R- and S-α-methylbenzylammonium lead iodide

Chem Commun (Camb). 2022 Jul 7;58(55):7650-7653. doi: 10.1039/d2cc01811j.

Authors

Tariq Sheikh¹, Shabnum Maqbool¹, Parikshit Kumar Rajput¹, Pankaj Mandal¹, Angshuman Nag¹

Affiliation

¹ Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India. [email protected].

PMID: 35723535
DOI: 10.1039/d2cc01811j

Abstract

The introduction of chirality in layered hybrid perovskites breaks the symmetry of their inorganic sub-lattices. Consequently, they show intriguing linear and non-linear optical properties. Here we explore the effect of chirality on the excitonic photoluminescence of chiral (R- and S-α-MBA)₂PbI₄ (MBA: methylbenzylammonium) at cryogenic temperatures. The induced chirality splits the excitonic emissions below 150 K. Additionally, (R- and S-α-MBA)₂PbI₄ show wavelength-tunable second harmonic generation (SHG) that depends strongly on the polarization angle of the incident light.