Zhu Tong, Snaider Jordan M, Yuan Long, Huang Libai
Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA; email:
Laser/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Annu Rev Phys Chem. 2019 Jun 14;70:219-244. doi: 10.1146/annurev-physchem-042018-052605. Epub 2019 Mar 18.
We highlight the recent progress in ultrafast dynamic microscopy that combines ultrafast optical spectroscopy with microscopy approaches, focusing on the application transient absorption microscopy (TAM) to directly image energy and charge transport in solar energy harvesting and conversion systems. We discuss the principles, instrumentation, and resolutions of TAM. The simultaneous spatial, temporal, and excited-state-specific resolutions of TAM unraveled exciton and charge transport mechanisms that were previously obscured in conventional ultrafast spectroscopy measurements for systems such as organic solar cells, hybrid perovskite thin films, and molecular aggregates. We also discuss future directions to improve resolutions and to develop other ultrafast imaging contrasts beyond transient absorption.
我们重点介绍了超快动态显微镜的最新进展，该技术将超快光学光谱与显微镜方法相结合，重点关注瞬态吸收显微镜（TAM）在太阳能收集和转换系统中直接成像能量和电荷传输的应用。我们讨论了TAM的原理、仪器设备和分辨率。TAM同时具备的空间、时间和激发态特异性分辨率揭示了激子和电荷传输机制，这些机制在传统超快光谱测量中对于有机太阳能电池、混合钙钛矿薄膜和分子聚集体等系统来说是模糊不清的。我们还讨论了提高分辨率以及开发除瞬态吸收之外的其他超快成像对比度的未来方向。
