共 39 条
Synthesis, structural characterization and optical properties of new compounds: Centrosymmetric Ba2GaMQ5 (M=Sb,Bi; Q=Se,Te), Ba2InSbTe5 and noncentrosymmetric Ba2InSbSe5
被引:28
|作者:
Hao, Wenyu
[1
,2
,3
]
Mei, Dajiang
[1
,2
,3
]
Yin, Wenlong
[1
,2
,3
]
Feng, Kai
[1
,2
,3
]
Yao, Jiyong
[1
,2
]
Wu, Yicheng
[1
,2
]
机构:
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Ctr Crystal Res & Dev, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Funct Crystals & Laser Technol, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Selenides;
Tellurides;
Synthesis;
Crystal structure;
SHG;
BISMUTH SULFIDES;
THERMOELECTRIC PROPERTIES;
CRYSTAL;
GE;
SI;
SERIES;
LAYER;
EARTH;
SE;
SN;
D O I:
10.1016/j.jssc.2012.09.034
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
The six compounds Ba(2)GaMQ(5) (M=Sb,Bi; Q=Se,Te) and Ba(2)InSbQ(5) (Q=Se,Te) have been synthesized for the first time. Ba(2)GaMQ(5) (M=Sb,Bi; Q=Se,Te) and Ba2InSbTe5 crystallize in the centrosymmetric space group Pnma, while Ba2InSbSe5 belongs to the noncentrosymmetric polar space group Cmc2(1). The structures of the six new compounds contain infinite (1)(infinity)[MM'Q(5)](4-) anionic chains built by MQ(4) (M'=Ga,In) tetrahedra and heavily distorted M'Q(6) (M'=Sb,Bi) octahedra. Ba2InSbSe5 possesses a band gap of 1.92(5) eV and exhibits a weak powder second harmonic generation signal using the 2090 nm laser as fundamental wavelength. (C) 2012 Elsevier Inc. All rights reserved.
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页码:81 / 86
页数:6
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