In situ reversible tuning of photoluminescence of an epitaxial thin film via piezoelectric strain induced by a Pb(Mg1/3Nb2/3)O3- PbTiO3 single crystal
In situ reversible tuning of photoluminescence of an epitaxial thin film via piezoelectric strain induced by a Pb(Mg1/3Nb2/3)O3- PbTiO3 single crystal
复制标题
通过 Pb(Mg1/3Nb2/3)O-3- PbTiO3 单晶诱导的压电应变原位可逆调谐外延薄膜的光致发光
DOI：
10.1039/c7tc03123h
复制
发表时间：
2017-09-21
影响因子：
6.4
通讯作者：
Luo, Haosu
中科院分区：
文献类型：
--
作者：
Wang, Feifei;Liu, Dan;Luo, Haosu
传统的光致发光（PL）性质的调制主要是通过传统的化学方法进行的，这些方法是非原位的、不可逆的和静态的调制技术，这可能限制了对发光和智能PL应用的详细过程的理解。在这里，在原位动态程序开发，通过电场诱导应变的压电单晶Pb（Mg 1/3 Nb 2/3）O-3-PbTiO 3（PMN-PT）衬底的外延Yb 3 +/Er 3+共掺杂BaTiO 3薄膜的PL响应进行调谐。当外加电场作用于PMN-PT单晶衬底时，实现了PL强度的可逆调谐和增强。导致荧光强度动态增强的机制是应变诱导的较低的基质对称性，从而提高了稀土离子的超灵敏跃迁几率。本工作为利用压电应变对发光器件的发光性能进行原位动态主动调控提供了重要的指导。
Conventionally, photoluminescence (PL) properties are mainly modulated through traditional chemical approaches which are ex situ, irreversible and static modulation techniques, potentially limiting the understanding of the detailed process of luminescence and smart PL applications. Here, an in situ dynamic routine is developed to tune the PL response in an epitaxial Yb3+/Er3+ co-doped BaTiO3 thin film through electric-field-induced strain of a piezoelectric single-crystal Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) substrate. A reversible tuning and enhancement of the PL intensity was achieved when an external electric field was applied to the PMN-PT single-crystal substrate. The underlying mechanism responsible for the dynamic enhancement of the PL intensity was attributed to the strain induced lower host symmetry so as to enhance the hypersensitive transition probability of the rare-earth ions. The present work could provide a significant guide for the in situ dynamic and active modulation of the PL performances of luminescent devices through the piezoelectric strain.