Femtosecond stimulated Raman spectro-microscopy for probing chemical reaction dynamics in solid-state materials
Femtosecond stimulated Raman spectro-microscopy for probing chemical reaction dynamics in solid-state materials
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DOI：
10.1063/5.0009976
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发表时间：
2020-07-21
影响因子：
4.4
通讯作者：
Frontiera, Renee R.
中科院分区：
文献类型：
--
作者：
Cassabaum, Alyssa A.;Bera, Kajari;Frontiera, Renee R.
飞秒受激拉曼光谱（FSRS）是一种化学特异性振动技术，能够在超快时间尺度上跟踪光诱导过程（如电荷转移）期间的结构动力学。FSRS在结构动力学和阐明化学机制方面有很强的背景;然而，它在固态材料中的应用受到限制。由于光伏和电子设备依赖于固态材料，因此在其电荷转移和传输过程中能够跟踪不断变化的动态是至关重要的。这些固态材料的结构动力学将导致识别负责各种光致电荷转移反应的特定化学结构，从而更好地理解改进当前技术所需的结构-功能关系。分离驱动所需物理过程的特定核运动和分子结构将提供化学蓝图，从而合理设计和制造高效的电子和光伏器件。从这个角度来看，我们讨论了技术挑战和实验发展，促进了使用FSRS与固态样品，探索以前的研究，已经确定的结构-功能关系的电荷转移反应，并分析未来的发展，将扩大和推进该领域。
Femtosecond stimulated Raman spectroscopy (FSRS) is a chemically specific vibrational technique that has the ability to follow structural dynamics during photoinduced processes such as charge transfer on the ultrafast timescale. FSRS has a strong background in following structural dynamics and elucidating chemical mechanisms; however, its use with solid-state materials has been limited. As photovoltaic and electronic devices rely on solid-state materials, having the ability to track the evolving dynamics during their charge transfer and transport processes is crucial. Following the structural dynamics in these solid-state materials will lead to the identification of specific chemical structures responsible for various photoinduced charge transfer reactions, leading to a greater understanding of the structure-function relationships needed to improve upon current technologies. Isolating the specific nuclear motions and molecular structures that drive a desired physical process will provide a chemical blueprint, leading to the rational design and fabrication of efficient electronic and photovoltaic devices. In this perspective, we discuss technical challenges and experimental developments that have facilitated the use of FSRS with solid-state samples, explore previous studies that have identified structure-function relationships in charge transfer reactions, and analyze the future developments that will broaden and advance the field.