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中国科协362次青年科学家论坛报告——Controllable Synthesis of CsPbX3 Perovskite Nanocrystals and Strategies for Stabi

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核心提示:Biography Professor Qiao Zhang received his B.S. and M.S. from USTC (with Prof. Shuhong Yu) and his Ph.D. in the Departm



 Biography
       Professor Qiao Zhang received his B.S. and M.S. from USTC (with Prof. Shuhong Yu) and his Ph.D. in the Department of Chemistry (with Prof. Yadong Yin), University of California Riverside in 2012. After being a Postdoctoral Fellow in the Department of Chemistry, University of California Berkeley (2012–2014) with Prof. A. Paul Alivisatos and Prof. Gabor A. Somorjai, he joined Soochow University as a professor in 2014. His main research field is rational design and synthesis of various nanomaterials for heterogeneous catalysis and optoelectronics。


报告摘要:
     All-inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite nanocrystals have been regarded as emerging materials in diverse fields due to their excellent photophysical properties. Recently, our group has developed some new synthetic strategies including solvothermal, microwave-assisted, post-treatment and room-temperature injection synthesis methods to prepare colloidal CsPbX3 perovskite nanocrystals. By the manipulation of reaction parameters (surface ligands, reaction kinetics, etc.), CsPbX3 perovskite nanocrystals with controllable morphologies, such as nanocube, nanowire, nanoplate, have been synthesized. In addition, the stabilities of such nanocrystals against water, polar solvent, heat and light treatment can be improved by surface engineering. Ligands (trioctylphosphine oxide, 1-octylphosphonic acid) and oxides (SiO2 and ZrO2) have been successfully demonstrated. We believe these works will shed some light on not only CsPbX3 nanocrystals synthesis and their nanocomposite design, but the stability problem-solving.

References

(1)   “Interfacial Synthesis of Highly Stable CsPbX3/Oxide Janus Nanoparticles” J. Am. Chem. Soc., 2018, 140 (1), 406–412

(2)   “From Nonluminescent Cs4PbX6 (X = Cl, Br, I) Nanocrystals to Highly Luminescent CsPbX3 Nanocrystals: Water-Triggered Transformation through a CsX-Stripping Mechanism" Nano Lett., 2017, 17 (9), 5799–5804

(3)   “One-Pot Synthesis of Highly Stable CsPbBr3@SiO2 Core–Shell Nanoparticles” ACS Nano, 2018, ASAP.





 
 
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