Electronic structure and excited state dynamics of 1) luminescent materials: the bulk doping and strong fluorescence emission of rare earth ions in wide band gap semiconductor nanocrystals were realized, and the research results of spectral properties and local structure of TiO2:Er nanocrystals (small 20 1 1, 7,3046) were selected as "201/kloc". Using rare earth ions as structural probes, the symmetry breaking phenomenon (Angew) at crystal site was studied. Chemistry. The inside is edited by … 2013,52, 1 128), which is commonly found in crystals with disordered distribution structure of rare earth-doped cations, and is revealed by low-temperature high-resolution fluorescence spectra (ESI papers cited frequently in the chemical field).
2) Optical properties of luminescent materials: dual-mode fluorescence (Adv. Mater. 20 10, 22, 3266) realized the up-conversion and down-conversion of Eu in water-soluble NaGdF4 nanocrystals by using the core-shell structure, and the paper was selected as one of the "20 10 China optical important achievements" and papers with high frequency of ESI citation in the field of materials (220 times cited); Five-photon pumped up-conversion stimulated emission was realized in π * * * yoke molecular luminescent material IPPS by mid-infrared femtosecond laser excitation, and a three-photon pumped up-conversion stimulated emission with net conversion efficiency as high as 10.4% was obtained (Nature Photonics 20 13,7234, selected as "2013 China Optical Importance". It breaks through the technology of preparing non-rare earth red phosphor with high quantum yield by ion exchange wet chemical method at room temperature, and realizes the high light efficiency output of warm white LED with high index and low color (natural luminescence). , 20 14, 5,43 12).
3) Biological application exploration of luminescent materials: A new generation of fluorescent biomarkers based on rare earth fluoride and oxide nanoprobes has been developed and successfully used for heterogeneous and homogeneous detection of biomolecules, especially tumor markers (angew.chem.int.ed.2011,50,6306; 20 13, 52, 667 1; 20 14, 53, 1252), in which the development of subminiature ZrO2 _ 2-based rare earth fluorescent bioprobe (JACS 20 12, 134, 15083) was reviewed by C&UK and JACS spotlight column in the United States. An optical/magnetic dual-mode biomarker method based on KGdF4:Ln nanoprobe was developed to realize time-resolved fluorescence resonance energy transfer biological detection and MRI imaging (JACS 20 12, 134, 1323). Eight papers were selected as ESI papers with high citation frequency in the field of chemistry.
4) Development of advanced test platform for luminescent materials: design and develop low-temperature high-resolution laser spectrometer and up-conversion quantum yield tester, independently develop international leading photochemical and photophysical test and research platforms, and discover many novel optical properties; Relying on this platform, we cooperated with partner groups at home and abroad, and achieved a number of high-level achievements, which were published in top journals such as Science and Nature Mater.
In the past five years, Chen Xueyuan has published 46 SCI papers in magazines such as Nature Photonics and Nature Communication as a correspondent. , JACS, etc. Among them, the impact factor >: 10 paper 14, > 3 has 40 papers and 7 papers with front cover/back cover/cover (2 papers were selected as Angew. Chem.int.ed and Chem. EUR.J. Hot papers and frontier). In recent five years, more than 3,200 papers have been cited, among which 9 papers have been selected as the papers with high cited frequency (top 1%) in the field of chemistry and materials in recent ten years. Published Springer monograph 1 "Rare Earth Nanoluminescent Materials: From Fundamentals to Biological Applications", with 3 special chapters. Apply for 27 invention patents at home and abroad (6 authorized).