阳离子聚合
替代(逻辑)
非线性光学
结晶学
材料科学
分析化学(期刊)
物理化学
化学
非线性系统
物理
计算机科学
有机化学
程序设计语言
量子力学
高分子化学
作者
Xiaoyu Lou,Xiao‐Ming Jiang,Bin‐Wen Liu,Guo‐Cong Guo
出处
期刊:Small
[Wiley]
日期:2023-09-11
卷期号:20 (3)
被引量:5
标识
DOI:10.1002/smll.202305711
摘要
Abstract The typical chalcopyrite AgGaQ 2 (Q = S, Se) are commercial infrared (IR) second‐order nonlinear optical (NLO) materials; however, they suffer from unexpected laser‐induced damage thresholds (LIDTs) primairy due to their narrow band gaps. Herein, what sets this apart from previously reported chemical substitutions is the utilization of an unusual cationic substitution strategy, represented by [[SZn 4 ]S 12 + [S 4 Zn 13 ]S 24 + 11ZnS 4 ⇒ MS 12 + [M 4 Cl]S 24 + 11GaS 4 ], in which the covalent S x Zn y units in the diamond‐like sphalerite ZnS are synergistically replaced by cationic M x Cl y units, resulting in two novel salt‐inclusion sulfides, M[M 4 Cl][Ga 11 S 20 ] (M = A/Ba, A = K, 1 ; Rb, 2 ). As expected, the introduction of mixed cations in the GaS 4 anionic frameworks of 1 and 2 leads to wide band gaps (3.04 and 3.01 eV), which exceeds the value of AgGaS 2 , facilitating the improvement of high LIDTs (9.4 and 10.3 × AgGaS 2 @1.06 µm, respectively). Furthermore, compounds 1 and 2 exhibit moderate second‐harmonic generation intensities (0.84 and 0.78 × AgGaS 2 @2.9 µm, respectively), mainly originating from the orderly packing tetrahedral GaS 4 units. Importantly, this study demonstrates the successful application of the cationic substitution strategy based on diamond‐like structures to provide a feasible chemical design insight for constructing high‐performance NLO materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI