Siebenhofer Matthäus, Viernstein Alexander, Morgenbesser Maximilian, Fleig Jürgen, Kubicek Markus
Institute of Chemical Technologies and Analytics, Vienna University of Technology Austria
CEST Centre of Electrochemistry and Surface Technology, Wr. Neustadt Austria.
Mater Adv. 2021 Oct 26;2(23):7583-7619. doi: 10.1039/d1ma00906k. eCollection 2021 Nov 29.
The interaction of light with solids has been of ever-growing interest for centuries, even more so since the quest for sustainable utilization and storage of solar energy became a major task for industry and research. With SrTiO being a model material for an extensive exploration of the defect chemistry of mixed conducting perovskite oxides, it has also been a vanguard in advancing the understanding of the interaction between light and the electronic and ionic structure of solids. In the course of these efforts, many phenomena occurring during or subsequent to the illumination of SrTiO have been investigated. Here, we give an overview of the numerous photoinduced effects in SrTiO and their inherent connection to electronic structure and defect chemistry. In more detail, advances in the fields of photoconductivity, photoluminescence, photovoltages, photochromism and photocatalysis are summarized and their underlying elemental processes are discussed. In light of recent research, this review also emphasizes the fundamental differences between illuminating SrTiO either at low temperatures (<RT) or at high temperatures (>200 °C), where in addition to electronic processes, also photoionic interactions become relevant. A survey of the multitude of different processes shows that a profound and comprehensive understanding of the defect chemistry and its alteration under illumination is both vital to optimizing devices and to pushing the boundaries of research and advancing the fundamental understanding of solids.
几个世纪以来，光与固体的相互作用一直备受关注，自从对太阳能的可持续利用和存储成为工业和研究的一项主要任务以来，这种关注更是与日俱增。由于SrTiO是广泛探索混合导电钙钛矿氧化物缺陷化学的模型材料，它在推动对光与固体的电子和离子结构之间相互作用的理解方面也一直处于前沿。在这些努力过程中，人们研究了SrTiO光照期间或之后出现的许多现象。在此，我们概述了SrTiO中众多的光致效应及其与电子结构和缺陷化学的内在联系。更详细地说，总结了光导率、光致发光、光电压、光致变色和光催化等领域的进展，并讨论了其潜在的基本过程。鉴于最近的研究，本综述还强调了在低温（<室温）或高温（>200°C）下照射SrTiO之间的根本差异，其中除了电子过程外，光离子相互作用也变得至关重要。对众多不同过程的调查表明，深入全面地了解缺陷化学及其在光照下的变化对于优化器件以及突破研究界限和推进对固体的基本理解都至关重要。
