稀土掺杂无机–有机杂化纳米材料在近年来受到国内外研究人员的极大关注，其优异的发光性能来自于有机配体向稀土离子的高效率能量传递（或“天线”效应）。近期研究表明这种无机–有机杂化纳米材料经过特定热处理后能够显示出较显著的双重激发特性，这两种激发模式可以体现出不同的强度和谱段范围，是实现对其发光性能调控的技术基础。本项目将基于无机–有机杂化纳米材料的这种双重激发特性，通过可控制备和后处理工艺对这两种激发模式进行调控，达到宽谱激发的研究目标及其发光性能的全面调控。为了研究这两种激发模式在同时被启动状态下对发光性能的动态影响行为，我们创新性地提出了在双光源激发模式下研究其发光性能的实验方案，对这两种激发模式之间的动态相互作用机制进行系统性研究。本项目也将对这种宽谱激发杂化纳米材料在太阳电池光谱转换和细胞成像技术领域的应用进行深入探索。本项目研究结果将为研制宽谱激发纳米发光材料提供实验和理论基础。

In recent years, lanthanide-doped inorganic-organic hybrid nanomaterials have received intensive attention from researchers across the world. Their outstanding photoluminescence is a result of the efficient energy transfer (or the “antenna” effect) from the organic ligands to the lanthanide ions. Recent research indicated that the inorganic-organic hybrid nanomaterials can possess remarkable double-channel excitation characteristics after a controlled annealing process. These two excitation channels can have different intensity and spectral range, which can be used to tune their photoluminescence properties. Taking advantage of such double-channel excitation characteristics for the inorganic-organic hybrid nanomaterials, this project will optimize the two excitation channels by adjusting the preparation and post-processing conditions. Consequently, the excitation spectral bandwidth of the inorganic-organic hybrid nanomaterials is greatly widened, and their photoluminescence is optimized in a controlled manner. In order to investigate the dynamic effects of the two excitation channels when simultaneously initiated on the photoluminescence properties of the inorganic-organic hybrid nanomaterials, a novel experimental method was proposed. Two optical sources will be used in this method so that the two excitation channels can be simultaneously initiated. The dynamic interaction mechanism between the two excitation channels can therefore be systematically studied. The applications of the inorganic-organic hybrid nanomaterials in the spectral conversion for solar cells and the imaging of cells are to be explored. The research results of this project will be experimentally and theoretically beneficial to the development of inorganic-organic hybrid nanomaterials with wide excitation spectral bandwidth.