Issue 2, 2023

Rational design of an organic–inorganic hybrid with Schiff base cations for an efficient quadratic nonlinear optical switch

Abstract

Recently, impressive progress has been achieved on a new and brilliant scheme for a solid-state quadratic nonlinear optical (NLO) switch, which holds enormous potential for developing next-generation intelligent optoelectronic devices. However, most of them are still restricted by their poor switching capability and low operating temperature. Herein, we present a rational design approach for developing a highly efficient hybrid halide NLO switching material through introducing conjugated aromatic Schiff base cations. As expected, an organic–inorganic hybrid halide compound (C10H14N)PbBr3 (1, C10H14N is N-propylbenzylideneaminium) has been developed, which exhibits highly efficient modulation of the quadratic NLO property (1.05 times that of KH2PO4) and a high phase transition temperature of 411 K. Besides, the second harmonic generation (SHG) powder test demonstrates that this material is phase matchable. Microscopic single-crystal structure analysis combined with theoretical calculations reveals that the high-performance NLO switching behaviour of 1 originates from the reversible ordered/disordered transformation of the aromatic Schiff base N-propylbenzylideneaminium cations accompanied by the re-orientation of the inorganic [PbBr3] framework. More importantly, further investigations show that the conjugated effect of the Schiff base cations makes important contributions to the NLO properties of 1. This work opens up a new route for designing highly efficient quadratic NLO switches and provides a promising way to further develop high-performance solid-state phase transition materials (e.g. ferroelectrics) and intelligent optoelectronic devices.

Graphical abstract: Rational design of an organic–inorganic hybrid with Schiff base cations for an efficient quadratic nonlinear optical switch

Supplementary files

Article information

Article type
Research Article
Submitted
08 okt 2022
Accepted
20 nov 2022
First published
21 nov 2022

Inorg. Chem. Front., 2023,10, 435-442

Rational design of an organic–inorganic hybrid with Schiff base cations for an efficient quadratic nonlinear optical switch

K. Li, H. Ye, X. Li, X. Wang, J. Luo and X. Liu, Inorg. Chem. Front., 2023, 10, 435 DOI: 10.1039/D2QI02149H

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