NDLI: Two rare-earth-based quaternary chalcogenides EuCdGeQ4 (Q = S, Se) with strong second-harmonic generation.

Content Provider	Semantic Scholar
Author	Xing, Wenhao Wang, Naizheng Guo, Yangwu Li, Zhuang Tang, Jian Kang, Kaijin Yin, Wenlong Lin, Zheshuai Yao, Jiyong Kang, Bin
Copyright Year	2019
Abstract	Two new rare-earth-based chalcogenides EuCdGeQ4 (Q = S, Se) have been designed and constructed by using Eu2+ and the classical NLO-active SBUs of [CdQ4] and [GeQ4]. They crystallize in a non-centrosymmetric Ama2 (no. 40) space group. Benefiting from the synergistic effects of [GeQ4] and highly distorted [CdQ4] tetrahedra, both compounds possess type-I phase-matching behaviour and large powder second harmonic generation (SHG) effects at 2.09 μm (2.6 and 3.8 × AgGaS2 for sulfide and selenide), as well as large direct band gaps (2.5 eV and 2.25 eV). Besides, they melt congruently at relatively low temperatures (997 °C for EuCdGeS4 and 882 °C for EuCdGSe4), which is suitable for bulk crystal growth by the Bridgman method. In addition, their electronic structures and some optical coefficients are calculated by first-principles.
File Format	PDF HTM / HTML
DOI	10.1039/c9dt03755a
PubMed reference number	31755500
Journal	Medline
Alternate Webpage(s)	http://www.rsc.org/suppdata/c9/dt/c9dt03755a/c9dt03755a1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c9dt03755a
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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