We demonstrate that photoluminescence in solid electrolytes is sensitive to the atomic structure of the defect complex that is decisive to the ionic conduction. We systematically measure the photoluminescence spectra of a typical solid oxide electrolyte, stabilized zirconia sintered pellets. Based on the comparison with the photoluminescence spectrum of a single crystal, we assign the broad long-lived photoluminescence band in the visible region near 2.4eV to that related to the defect complex. Because the electronic state of the oxygen vacancy is sensitive to the surrounding ions, which has been indicated in previous investigations of the local structure around the dopants and vacancies, we are able to assign each sample’s photoluminescence characteristics to a certain atomic arrangement that is considered plausible based on previous investigations. Photoluminescence spectroscopy is applicable to various solid electrolytes and can become a powerful tool for their characterization.

我们证明了固体电解质中的光致发光对缺陷复合物的原子结构很敏感，而该缺陷复合物对离子传导起决定性作用。我们系统地测量了典型的固体氧化物电解质，稳定的氧化锆烧结颗粒的光致发光光谱。基于与单晶的光致发光光谱的比较，我们将可见光区域中2.4eV附近的宽广的长寿命光致发光带分配给与缺陷复合物相关的光致发光带。由于氧空位的电子状态对周围的离子敏感，这在先前对掺杂剂和空位周围的局部结构的研究中已经表明，根据先前的研究，我们能够将每个样品的光致发光特性分配给某个被认为是合理的原子排列。光致发光光谱学适用于各种固体电解质，并且可以成为表征其的有力工具。