光致发光的调控对于研究发光材料的物理机制及其广泛应用具有重要意义。目前金属离子掺杂发光材料的发光调控局限于传统的化学方法即调整材料基质和掺杂离子组分或者合成条件，这种手段限制了对具体发光动态过程的认识和应用。利用铁电基质的晶体结构和极化受外场耦合可变的性质并结合某些掺杂金属离子的发光受晶体环境影响的特征，我们在此提出了"铁电电控光致发光"新慨念。为实验证实这个原创性慨念，本研究我们用激光分子束外延法制备多种金属离子掺杂铁电薄膜，将采用与传统化学途径完全不同的电场方法，以可逆原位和实时动态方式实现对光致发光的调控。应用我们铁电-发光联合检测等实验装置，系统研究材料的合成工艺，微结构，铁电以及与发光性质的关系。实验结果将和理论模型比较，有望深入认识这种新现象。本研究将有助于推动铁电和发光材料两方面研究，尝试不同研究领域的交叉，并对研制新型多功能集成器件如提出的电控上转换发光器件带来重要影响。

Tunable photoluminescence (PL), namely spectroscopic tuning and PL intensity enhancement in phosphors are highly desirable for the purpose of understanding the physical processes of energy transition and transfer as well as widespread applications. To date, modification of the PL in metal activator ion doped materials excited by a given excitation source can only be achieved by changing the composition of host materials and/or doping metal ions, limiting our understanding of the detailed process of luminescence and applications. By taking advantage of the unique properties of variables coupling crystal structure and polarization of ferroelectric host material in combination with the luminescence of doping metal ions affected by the crystal environment, here we propose a new concept, namely electric control of photoluminescence in ferroelectrics. In this project, in order to verify the original concept experimentally, we propose to grow various thin-films of metal ion-doped ferroelectrics by laser molecular beam epitaxy and the PL modification in metal ion-doped ferroelectrics will be realized in reversible, in-situ, real-time and dynamical way under electric-field control, which is in contrast to the above conventional chemical route. With our developed novel measurement system allowing characterization of PL and ferroelectric properties simultaneously, the synthesis process, resultant microstructure and ferroelectric properties as well as their correlations with luminescent properties of the materials, will be systemically investigated. The measured results will be compared with theoretical models to gain a more detailed understanding of the observed new phenomena. Consequently, the proposed research will give a new impulse to the investigation of both ferroelectrics and phosphors, which is expected to unlock a realm of new possibilities in the field of ferroelectric-luminescence. This also promises high impact on the multifunctional integrated device applications, such as our proposed electric controlled upconvertor.