Effective Repeatable Mechanoluminescence in Heterostructured Li1-xNaxNbO3: Pr3+
Effective Repeatable Mechanoluminescence in Heterostructured Li1-xNaxNbO3: Pr3+
复制标题
异质结构 Li1- x Nax NbO3 : Pr3 中有效的可重复机械发光。
作者：
Yang Xiuxia;Liu Rong;Xu Xuhui;Liu Zhichao;Sun Mingzi;Yan Wei;Peng Dengfeng;Xu Chao-Nan;Huang Bolong;Tu Dong
机械发光（ML）是一种通过机械能到光能的转换而实现的引人注目的光学现象。在此，已经开发了一系列Li1−xNaxNbO3：Pr3+（x = 0，0.2，0.5，0.8，1.0）ML材料。特别是，由于异质结构的形成，合成的Li0.5Na0.5NbO3：Pr3+有效地耦合陷阱结构和压电性能，实现高度可重复的ML性能，而无需传统的预辐照工艺。此外，在太阳光照射和预热条件下测量的ML性能证实了Li 0.5Na 0.5NbO3：Pr3+的ML性能可以归因于双模式发光机制，包括陷阱可控和自恢复模式。此外，DFT计算进一步证实，Na+离子在LiNbO3中的掺杂导致电子调制的异质结构的形成，这优化了陷阱的分布和浓度。这些调制提高了电子转移效率，以促进ML性能。这为今后设计和合成具有广泛应用前景的高效ML材料提供了重要参考。
Mechanoluminescence (ML) is a striking optical phenomenon that is achieved through mechanical to optical energy conversion. Here, a series of Li1−xNaxNbO3: Pr3+ (x = 0, 0.2, 0.5, 0.8, 1.0) ML materials have been developed. In particular, due to the formation of heterostructure, the synthesized Li0.5Na0.5NbO3: Pr3+ effectively couples the trap structures and piezoelectric property to realize the highly repeatable ML performance without traditional preirradiation process. Furthermore, the ML performances measured under sunlight irradiation and preheating confirm that the ML properties of Li0.5Na0.5NbO3: Pr3+ can be ascribed to the dual modes of luminescence mechanism, including both trap‐controllable and self‐recoverable modes. In addition, DFT calculations further confirm that the doping of Na+ ions in LiNbO3 leads to electronic modulations by the formation of the heterostructures, which optimizes the trap distributions and concentrations. These modulations improve the electron transfer efficiency to promote ML performances. This work has supplied significant references for future design and synthesis of efficient ML materials for broad applications.