Achiral phosphonium induced remarkable circular polarized luminescence in a chiral cadmium(II) halide perovskite material

Shubhankar Barman; Priya Ranjan; Anuja Datta

doi:10.1039/d3cc02666c

Achiral phosphonium induced remarkable circular polarized luminescence in a chiral cadmium(II) halide perovskite material

Chem Commun (Camb). 2023 Aug 22;59(68):10283-10286. doi: 10.1039/d3cc02666c.

Authors

Shubhankar Barman¹, Priya Ranjan¹, Anuja Datta^{1

2}

Affiliations

¹ School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India. psuad4@iacs.res.in.
² Technical Research Center, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.

PMID: 37539629
DOI: 10.1039/d3cc02666c

Abstract

Circular polarized luminescence (CPL) sensitive two-dimensional organic inorganic halide perovskites have versatile applications in optical displays, encrypted transmission and quantum communications. Here, a new chiral hybrid [MePh₃P]₂CdCl₄ (PCC) single crystal (SC) is synthesized using an achiral phosphonium cation by a solvent evaporation process at room temperature (rt). SC x-ray study reveals a non-centrosymmetric point group 23, with 2₁-screw optical axes providing a chiral Sohncke space group. Hirshfeld surface analysis suggests long-range H-bonding and ionic interactions (~ 3-9 kJ mol^-1) and short-range Van der Waals and dispersion interactions (∼0.4-4 kJ mol^-1). Both the PCC thin films and SCs exhibit prominent circular dichroism (CD) and remarkably superior CPL activity at rt (|g_CD| ≈ 5 × 10^-3 and |g_lum| ≈ 4.3 × 10^-2).