IJM027 Second Harmonic Generation of Polymorphic Bismuth Halide Structures

Abstract

In this work, synthesis and utilization of hybrid materials from the Et₃​NH⁺, Bi³⁺, and Br⁻ components for second harmonic generation (SHG) are presented. Two different phases that both had the exact same chemical composition, (Et₃​NH)₃​Bi₂​Br₉​, were crystallized. These two phases were noteworthy because they possessed contrasting crystal structures: one phase was noncentrosymmetric and could generate an SHG signal, while the other phase was centrosymmetric and lacked SHG capability.