立体化学活性单双和二维多层锡和胺矿的非线性光学特性
Xinyu Li1, Yan Guan1, Xiaotong Li2
1Beijing National Laboratory for Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Journal of the American Chemical Society
|September 22, 2022
概括
这项研究探讨了新的2D锡和酸矿,揭示了它们的可调性半导体特性以及由于独特的单对电子活动而成为光电子的无替代品的潜力.
科学领域:
- 材料科学
- 固态化学
- 光电子产品
背景情况:
- 二维 (2D) 金属化是可调节的半导体,之前的研究集中在基于 (Pb) 的系统上.
- 基于多层锡 (Sn) 和 (Ge) 的二维矿仍未得到充分探索,尽管它具有多样化的结构化学和独特的电子对极化性.
研究的目的:
- 合成和描述新的二维锡和酸矿.
- 研究结构-属性关系,特别是单对立体化学活动对晶体结构,半导体和非线性光学属性的影响.
- 评估这些材料作为光电子应用的潜在无替代品.
主要方法:
- 2D化 (BA) 2和2D化 (BA) 2的合成,其中BA=n-和A=各种有机离子.
- 与基于Pb的对应产品进行结构分析和比较.
- 半导体特性 (带隙,载体-声子相互作用) 和非线性光学特性 (第二波生成,两光子吸收) 的表征.
主要成果:
- 建立了单对活动,晶体结构和材料特性之间的相关性.
- 观察到载体 - 声子相互作用强度增加与单一对活动增强,导致更突出的低能光发射尾巴.
- 在 (BA) 2中表现出强烈的第二波生成 (∼10 pm V-1),明显超过了Sn和Pb类型.
- 报告的第三阶二光子吸收系数 (∼10厘米MW-1) 对于 (BA) 2(A) Sn2 I7,比Pb对应物和传统半导体更大.
结论:
- 单对活动是二维化矿的组成和物理性质的关键因素.
- 2D锡和氧化佩洛夫斯基特具有有前途的非线性光学特性.
- 这些基于Sn和Ge的二维矿为先进的非线性光电子设备提供了可行的无替代品.
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