Journal
CHEMICAL COMMUNICATIONS
Volume 57, Issue 9, Pages 1109-1112Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc07396b
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Funding
- NSF of China [21771159, 22071212]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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This study successfully synthesized a new type of NLO material KAg3Ga8Se14, which exhibits moderate phase-matchable NLO response and a good laser damage threshold. The structure of this material is composed of alternating layers of AgGaSe2 and Ga2Se3-like slabs, and DFT calculations indicate that the AgSe4 and GaSe4 tetrahedral motifs are significant contributors to the NLO performance.
Obtaining fresh nonlinear optical (NLO) materials is an attractive and challenging topic for the development of laser techniques. Using benchmark AgGaQ(2) (Q = S, Se) as the template, new KAg3Ga8Se14 is obtained by a solid-state reaction. Its structure can be built by the intergrowth of 2:1 AgGaSe2 and Ga2Se3-like slabs if the K site is occupied by Ag. Powdery KAg3Ga8Se14 demonstrates moderate phase-matchable NLO responses, and a LDT of ca. 2 x AgGaS2. DFT calculations reveal that both AgSe4 and GaSe4 tetrahedral motifs contribute a lot to the NLO performance. This work reveals a new class of promising infrared NLO materials, and the design strategy may apply to other systems.
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