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CsZn 2 BO 3 X 2 (X 2 =F 2 , Cl 2 , and FCl): A Series of Beryllium‐Free Deep‐Ultraviolet Nonlinear‐Optical Crystals with Excellent Properties
Author(s) -
Zhou Jinjie,
Liu Youquan,
Wu Hongping,
Yu Hongwei,
Lin Zheshuai,
Hu Zhanggui,
Wang Jiyang,
Wu Yicheng
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202008346
Subject(s) - beryllium , halogen , materials science , crystal (programming language) , crystal structure , crystallography , ultraviolet , nonlinear optical , optoelectronics , chemistry , nonlinear system , physics , computer science , organic chemistry , alkyl , programming language , quantum mechanics
Designing deep‐ultraviolet (DUV) nonlinear‐optical (NLO) crystals is one of the major current research interests, but it faces a great challenge. In order to overcome the problem of crystal growth and the toxicity of BeO raw materials in KBe 2 BO 3 F 2 (KBBF), the only applicable DUV NLO crystal so far, we substitute Be 2+ cations with Zn 2+ in the KBBF structure and modify the halogen anions, by which three new Zn‐containing KBBF‐like compounds, CsZn 2 BO 3 X 2 (X 2 =F 2 , Cl 2 , and FCl), have been successfully synthesized. They all exhibit excellent NLO properties, including improved SHG responses (2.8–3.5×KDP) and short UV cut‐off edges (<190 nm). In comparison with KBBF, CsZn 2 BO 3 X 2 (X 2 =F 2 , Cl 2 , and FCl) are all chemically benign and have better growth habits, so they are all promising as DUV NLO crystals. Further study on structure–property relationships indicates that the mixing of halogen anions is a feasible strategy to enhance the SHG responses of the KBBF family.