基于电致离子输运的稀土配合物光写电读存储器的设计及性能研究

Switching luminescence of lanthanide-based molecules through external electric field has been considered as a promising approach toward novel molecule-based devices for future information storage application. Recent reported lanthanide-based complexes with tunable luminescent properties through redox or diffusion methods still suffer from the poor stability as well as the rigorous operation conditions, such as in solution. In addition, though technological applications which utilize lanthanide based molecules as molecular components will require the formation of these molecules on suitable surfaces, the research on this concern is still limited. In this project, on the basis of our previous researches, we attempt to develop a novel method in which the luminescence of lanthanide complexes film is modulated by voltage-induced ion transport. To achieve this goal, we will first synthesize a luminescent and sublimely lanthanide based complexes and construct a multilayer structure. Then the effects of the voltage induced ion transport behaviors and molecular structure of lanthanide based complexes on the luminescence of the as-formed lanthanide complexes film will be investigated. It is expected that this research could open new perspectives for the design of switchable luminescent lanthanide based complexes and related electr-optic devices.

利用电场对稀土配合物的荧光性能进行调控并设计具有“电写光读”功能的信息存储器，是实现高密度信息存储的有效途径之一。最近已报导的研究表明，通过电场诱导的氧化还原作用或渗透作用对稀土配位化合物的荧光性能进行调控多需要在溶液环境进行，同时会产生较多的反应热从而导致器件单元稳定性差、循环次数低或调控不可逆等问题，限制了稀土配位化合物在信息存储中的应用。为了解决这些问题，在本项目中，我们将设计合成具有荧光性能的稀土配位化合物并提出利用电场诱导下离子输运行为对稀土配位化合物薄膜体系的荧光性能进行调控的研究设想。研究客体离子种类及稀土配位化合物分子结构对电场调控稀土配位化合物薄膜荧光性能的影响，阐明这些因素对电场调控稀土配位化合物薄膜荧光性能过程中的影响机制，为设计电写光读数据存储功能的原型器件提供依据。

以信息存储为背景，提出了利用电场实现材料荧光调控进行信息存储的策略。成功筛选了一种含有Cu和三苯胺分子的MOF材料，利用电场作用下铜离子的氧化还原实现了三苯胺分子的荧光性能调控。设计了一种具有升华特性的荧光稀土分子材料，并在其结构中引入可与荧光猝灭离子发生作用的位点。利用电场对荧光猝灭离子的迁移实现了稀土分子材料红光，绿光及黄光的调控。利用MOF材料键角可转动变化的特点，研究了相关MOF材料的阻变现象，获得了一种可在10%拉伸强度下具有可循环阻变现象的信息存储器件。这些发现为实现电写光读存储器以及柔性可拉伸阻变存储器的应用提供了思路。研究成果具有较强科学性和实用性。