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Cs 3 Pb 2 (CH 3 COO) 2 X 5 (X=I, Br): Halides with Strong Second‐Harmonic Generation Response Induced by Acetate Groups
Author(s) -
Shui QiRui,
Tang HongXin,
Fu RuiBiao,
Fang YuanBin,
Ma ZuJu,
Wu XinTao
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202013088
Subject(s) - halide , second harmonic generation , crystallography , dipole , chemistry , nonlinear optical , nonlinear optics , birefringence , metal halides , laser , materials science , analytical chemistry (journal) , inorganic chemistry , physics , optics , nonlinear system , organic chemistry , chromatography , quantum mechanics
Abstract Nonlinear optical (NLO) crystals are the key component in solid‐state lasers. New second‐harmonic generation (SHG) effective halides, Cs 3 Pb 2 (CH 3 COO) 2 X 5 (X=I, Br), have been rationally synthesized by introducing acetate groups into lead halide perovskites under moderate solvothermal conditions. Cs 3 Pb 2 (CH 3 COO) 2 X 5 (X=I, Br) feature highly oriented anionic chains constructed by distorted [PbX 4 O 2 ] (X=I, Br) polyhedrons. Both the theoretical studies and the dipole moment calculations uncover that their SHG effects are mainly originated from the distorted [PbX 4 O 2 ] (X=I, Br) polyhedrons. Remarkably, Cs 3 Pb 2 (CH 3 COO) 2 I 5 exhibits strong phase‐matching SHG response (8×KDP) and large birefringence (0.26@ 1064 nm). Moreover, Cs 3 Pb 2 (CH 3 COO) 2 X 5 (X=I, Br) also possess high laser damage threshold (LDT) which are almost 27 and 41 times that of AgGaS 2 , respectively.