教学工作 本科生课程：《发光物理》 研究生课程：《发光学》 著作 《发光物理-分立发光中心的能级与发光》，赵丽娟编著，南开大学出版社，2021年1月第一次印刷

1. 高效发光材料的理论设计和制备 主要研究稀土离子在凝聚态物质中的发光理论及发光现象，在发光理论的指导下设计和制备稀土发光材料。稀土离子具有丰富的能级，能提供从紫外到中红外波段的所有波长的发光，在照明、显示显像、固体激光器、光存储及光通讯等领域有重要应用。实用的高发光效率的稀土发光材料必须具备两个特性：一是相对于稀土离子的能级差，基质材料具有较低的声子能量或者合适的能量传输通道，以减小稀土离子的无辐射弛豫；二是稀土发光材料具备机械性能好、稳定性好和使用寿命长。目前的研究主要集中在从理论上预测高效稀土发光所需要的晶体场环境和从实验上探索高效稀土发光材料的制备方法。 2. 稀土发光中的能量传输过程研究 光致发光可以分为下转换发光和上转换发光，下转换发光是指稀土离子吸收高能光子后辐射一个或多个频率低能光子的发光现象，如果辐射单一频率的低能光子就是通常所说的发光或者能量迁移发光；如果辐射两个光子或两个以上频率的低能光子则称为发光的量子剪裁。上转换发光是指吸收两个或两个以上频率的低能光子而辐射一个高能光子的发光现象，上转换发光是实现短波长固体激光器的方案之一。对于目前设计制备的稀土发光材料，我们从理论和实验上研究稀土离子发光的能量传输过程和不同通道发光现象的应用，为稀土发光材料的实用化提供理论和实验基础。例如我们最近提出的可见光的量子剪裁过程，就可以使稀土离子铒掺杂的氟氧化物玻璃陶瓷材料的1.5微米发光效率成倍提高，为实现光纤通讯提供新型材料。利用稀土离子的上转换发光过程还可以解决红外激光探测的问题，由于这种无机材料探测卡的超长使用寿命和低成本，将代替目前有机材料制备的红外检测卡。 3.无机液体激光介质设计 无机液体激光介质是高能激光器的首选材料，目前已有水相法合成稀土掺杂氟化物纳米溶胶激光介质的报导，但激光增益远低于实际需求。我们首次提出在稀土氟氧化物玻璃体系中用热诱导技术制备玻璃陶瓷，通过条件控制使稀土体相掺杂于氟化物纳米晶中。用湿法腐蚀技术溶掉氟化物纳米晶周围的氧化物玻璃基质获得稀土体相掺杂的氟化物纳米晶溶胶。与传统合成方法相比，该方案解决了稀土离子团簇和居于纳米晶表面的问题，稀土发光的浓度猝灭效应被有效抑制。重点研究稀土氟化物纳米晶溶胶中纳米晶尺寸、均匀性、纳米晶浓度和溶剂的选择等对激发光吸收、散射和激光性能的影响，为发光溶胶用于液体激光介质提供科学依据，探索该溶胶用于无机液体激光介质的可行性，为高能和集成化液体激光器的研发提供新突破点。 4.超快光谱研究 超快光谱是探究激发态电子能量和动量传输过程的有效方法，随着飞秒激光技术的进步，宽带荧光光谱的时间分辨率已经突破亚飞秒量级。在前期理论研究基础上，拟在新型原位超高时空分辨的4D超快电子显微镜与4D超快阴极荧光测试系统中，对目前研究的稀土离子体相掺杂纳米材料进行微区成像和时间分别光谱测试，研究玻璃陶瓷中纳米晶形成和生长过程及机理，研究局域环境对稀土离子发光能量传输过程的调制。

“Pseudo-TCELs” of Tm3+ induced ultra-highly sensitive fluorescence thermometers with adjacent emission peaks, Yuting Fu, Yuao Guo, Lijuan Zhao, Wei Nai, Zan Yang, Dan Li, Journal of Alloys and Compounds, 2024, 996, 174730(1-11) Enhanced luminescence of Eu3+ doped β-PbF2 oxyfluoride glass ceramics for a new optical thermometry by charge compensation and local lattice symmetry breaking, Yuao Guo, Yuting Fu, Lijuan Zhao, Chemical Physics, 2024, 581, 112267(1-12) Single band luminescence of Bi3+ and the intensity modulation in potassium borosilicate glasses Binwen Niu, Lijuan Zhao, Shikang Liu, Haotian Dong, Hua Yu, Journal of Non-Crystalline Solids, 2022, 581, 121421-121427 Controlling the final phase of multiphase KGdF4 materials via chemical synthesis and structural phase transition Jinjin Liu, Hua Yu, Haotian Dong, Shikang Liu, and Lijuan Zhao J. Mater Sci: Mater Electron, 2020, 31:18096-18104 A transparent and dual-functional oxyfluoride glass ceramics with color-tunable up-conversion luminescence and high thermosensitivity Yuting Fu, Lijuan Zhao, Yuao Guo, Hua Yu Journal of Luminescence, 2020, 217, 116790 Upconversion luminescence modulated by alkali metal (Li, Na, K) induced crystallization in Er3+/Yb3+ co-doped ß-PbF2 oxyfluoride glass-ceramics Yuao Guo, Lijuan Zhao, Yuting Fu, Hua Yu, CrystEngComm, 2020, 22, 686-694 Er3+/Yb3+ co-doped nanocrystals modified with 6-aminocaproic acid for temperature sensing in biomedicine BingWu, Lijuan Zhao, Yuao Guo, Yuting Fu, Hua Yu RSC Advances,2019, 9, 42228-42235 Highly sensitive optical thermometers based on unconventional thermometric coupled levels of Tm3+ following a Boltzmann-type distribution in oxyfluoride glass ceramics Yuting Fu, Lijuan Zhao, Yuao Guo, Hua Yu, New Journal of Chemistry, 2019, 43, 16664-16669 Up-conversion luminescence lifetime thermometry based on the 1G4 state of Tm3+ modulated by cross relaxation processes, Dalton Transactions Yuting Fu, Lijuan Zhao, Yuao Guo, Hua Yu, Dalton Transactions, 2019, 48, 16034-16040 Tailoring up-conversion luminescence for single band located in first biological windows and optical thermometry of Yb3+/Ln3+ (Ln = Er, Tm) doped oxyfluoride ceramics via Cr3+ doping Yuao Guo, Lijuan Zhao, Yuting Fu, Hua Yu, Journal of Luminescence, 2019, 215, 116629- Tailoring up-conversion luminescence for optical thermometry in K+/Er3+ co-doped oxyfluoride glass ceramics Yuao Guo, Lijuan Zhao, Yuting Fu, Haotian Dong, Hua Yu Journal of Luminescence, 2019, 210, 247-254 Three-photon near-infrared quantum cutting in b-NaGdF4:Yb3+ Liying Guo, Hua Yu, Jinjin Liu, Bing Wu, Yuao Guo, Yuting Fu, Lijuan Zhao Journal of Alloys and Compounds, 2019, 784, 739-743 Ultrapure NIR-to-NIR single band emission of β-PbF2: Yb3+/Tm3+ in glass ceramics Yuting Fu, Lijuan Zhao, Yuao Guo, Bing Wu, Haotian Dong, Hua Yu Journal of Luminescence, 2019, 208, 33-38 Up-conversion luminescence for optical thermometry in K+ / Er3+ co-doped oxyfluoride glass ceramics Lijuan Zhaoa,, Yuao Guo, Yuting Fu and Hua Yu XVI ECerS Conference, Italy, Torino, June 16-20, 2019 Five-fold twinned b-PbF2 nanocrystals in oxyfluoride glass ceramics Yuao Guo, Lijuan Zhao, Yuting Fu, Pan Dong, Liying Guo and Hua Yu RSC Adv., 2018, 8, 40787 Crystallographic and spectroscopic evidence for intrinsic distortion in the disordered crystal β-NaGdF4 Jianning Jin, Hua Yu, Liying Guo, Jinjin Liu, Bing Wu, Yuao Guo, Yuting Fu and Lijuan Zhao Phys.Chem.Chem.Phys., 2018, 20, 15835-15840