Issue 11, 2024

Salt-inclusion sulfides [K4Cl][MII11In9S26] (MII = Zn, Cd) displaying robust nonlinear optical activity

Abstract

Noncentrosymmetric salt-inclusion chalcogenides (SICs) are a burgeoning class of second-order nonlinear optical (NLO) materials distinguished by their exceptional optical properties. These materials often exhibit robust second-harmonic generation (SHG) responses and possess wide band gaps that typically correspond to their impressive laser-induced damage threshold (LIDT). In this study, we present two isostructural salt-inclusion chalcogenides, namely [K4Cl][Zn11In9S26] (1) and [K4Cl][Cd11In9S26] (2), which consist of highly parallel-oriented host [MII11In9S26]3− frameworks, with guest [K4Cl]3+ ions incorporated to enhance structural stability and maintain charge balance. Notably, compounds 1 and 2 exhibit favorable NLO properties, including strong nonphase matching SHG intensities (1.9 and 5.7 × AgGaS2 for particle sizes of 30–50 μm) under 1910 nm laser irradiation. Furthermore, compounds 1 and 2 demonstrate suitable band gaps (2.48 and 2.61 eV) and exhibit minimal anisotropy in their thermal expansion coefficients (ranging from 0.09 to 1.01), contributing to their significant LIDT (7.0 and 4.6 × AgGaS2@1064 nm), respectively.

Graphical abstract: Salt-inclusion sulfides [K4Cl][MII11In9S26] (MII = Zn, Cd) displaying robust nonlinear optical activity

Supplementary files

Article information

Article type
Research Article
Submitted
20 okt. 2023
Accepted
09 apr. 2024
First published
20 apr. 2024

Mater. Chem. Front., 2024,8, 2350-2357

Salt-inclusion sulfides [K4Cl][MII11In9S26] (MII = Zn, Cd) displaying robust nonlinear optical activity

Y. Zhang, S. Pei, X. Jiang, B. Liu and G. Guo, Mater. Chem. Front., 2024, 8, 2350 DOI: 10.1039/D3QM01130E

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