Affiliation:
1. Research Center for Crystal Materials CAS Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Technical Institute of Physics & Chemistry CAS 40–1 South Beijing Road Urumqi 830011 China
Abstract
AbstractDeveloping high‐performance infrared (IR) nonlinear optical (NLO) materials is urgent but challenging due to the competition between NLO coefficient and bandgap in one compound. Herein, by coupling NLO‐active [BS3] planar units and halide‐centered polycations, six new metal thioborate halides ABa3B2S6X (A = Rb, Cs; X = Cl, Br, I) composed of zero‐dimensional [XBamRbn/Csn] polycations and [BS3] units, belonging to a new family, are rationally designed and fabricated. The compounds show an interesting structural transition from Pbcn (ABa3B2S6Cl) to Cmc21 (ABa3B2S6Br and ABa3B2S6I) driven by the clamping effect of polycationic frameworks. ABa3B2S6Br and ABa3B2S6I are the first series metal thioborate halide IR NLO materials, and the introduction of [BS3] unit effectively widens the bandgap of planar unit‐constructed chalcogenides. ABa3B2S6Br and ABa3B2S6I, exhibiting wide bandgaps (3.55–3.60 eV), high laser‐induced damage thresholds (≈ 6 × AgGaS2), and strong SHG effects (0.5–0.6 × AgGaS2) with phase‐matching behaviors, are the promising IR NLO candidates for high‐power laser applications. The results enrich the chemical and structural diversity of boron chemistry and give some insights into the design of new IR NLO materials with planar units.
Funder
National Natural Science Foundation of China
Xinjiang Key Laboratory of Electronic Information Materials and Devices
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry