NaZnCO3(OH):一种高性能碳酸紫外线非线性光学晶体,由KBe2BO3F2衍生
Guang Peng1,2, Chensheng Lin1, Ning Ye1
1Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
Journal of the American Chemical Society
|November 25, 2020
概括
研究人员通过修改KBBF结构开发了一种新的紫外线非线性光学晶体NaZnCO3(OH. 这种新材料具有很大的第二生成响应和短相匹配切断波长,使其对紫外线应用具有前景.
科学领域:
- 材料科学
- 固态化学
- 光学学
背景情况:
- 开发具有显著的第二生成 (SHG) 特性和短相匹配切断波长 (λPM) 的新型紫外线 (UV) 非线性光学 (NLO) 材料是一个持续的挑战.
- KBe2BO3F2 (KBBF) 结构是UV NLO材料的已知平台,但需要进一步改进.
研究的目的:
- 通过KBBF结构的演变合成一种新的碳酸UVNLO晶体.
- 研究新材料的SHG反应和相匹配特性.
- 探索用于设计高性能UVNLO材料的结构改造的潜力.
主要方法:
- KBBF框架的结构演变为碳酸盐系统.
- 新型碳化合物晶体NaZnCO3 ((OH) 的合成.
- 结晶的结构特征和NLO特性,包括SHG响应和λPM.
主要成果:
- 成功合成具有与KBBF相似的结构特征但具有增强的层间结合的NaZnCO3(OH).
- 在 1064 nm 达到 5.2 × KH2PO4 的大型SHG反应.
- 观察到201nm的短型SHG λPM,表明非常好的紫外线透明度.
结论:
- 由于其强烈的SHG效应和短的λPM,NaZnCO3(OH) 是一个有前途的新型UVNLO晶体.
- 发展KBBF结构是发现新的UVNLO材料的可行策略.
- 这项研究为设计高性能UVNLO材料开辟了新的途径.
更多相关视频
相关概念视频
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
01:26Imperfections in Crystal Structure: Stoichiometric Point Defects
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
01:29Imperfections in Crystal Structure: Non-Stoichiometric Defects
Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...