Wong E Laine, Folpini Giulia, Zhou Yang, Albaqami Minirah Dukhi, Petrozza Annamaria
Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Raffaele Rubattino, 81, Milano, 20134, Italy.
Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
Adv Mater. 2024 Jul;36(28):e2310240. doi: 10.1002/adma.202310240. Epub 2024 May 6.
In the past years, an increasing number of experimental techniques have emerged to address the need to unveil the chemical, structural, and electronic properties of perovskite thin films with high vertical and lateral spatial resolutions. One of these is angle-resolved photoemission electron spectroscopy which can provide direct access to the electronic band structure of perovskites, with the aim of overcoming elusive and controversial information due to the complex data interpretation of purely optical spectroscopic techniques. This perspective looks at the information that can be gleaned from the direct measurement of the electronic band structure of single crystal perovskites and the challenges that remain to be overcame to extend this technique to heterogeneous polycrystalline metal halide perovskites.
在过去几年中，越来越多的实验技术应运而生，以满足在高垂直和横向空间分辨率下揭示钙钛矿薄膜的化学、结构和电子性质的需求。其中之一是角分辨光电子能谱，它可以直接获取钙钛矿的电子能带结构，旨在克服由于纯光学光谱技术复杂的数据解释而产生的难以捉摸且有争议的信息。本文展望了从单晶钙钛矿电子能带结构的直接测量中可以收集到的信息，以及将该技术扩展到异质多晶金属卤化物钙钛矿时仍有待克服的挑战。
