key word
Perovskite nanocrystals, stability, silica porous microspheres, coating, bio imaging
Lead halide perovskite nanocrystals have been widely studied in recent years due to their excellent optical properties such as narrow half peak width of fluorescence emission, high fluorescence quantum yield and low laser threshold. As a coherent light source, this material has a great demand and prospect in the field of biological tissue visualization. However, it is generally accepted that the biggest obstacle in application is poor stability, which is easy to degrade at room temperature, and worse under high humidity, high temperature and UV exposure. In order to solve the problem of stability, Elena ushakova, Ph.D. team of Russia Shengguang University, and Andrey rogach, Professor of Hong Kong City University, jointly prepared a luminescent composite material: the perovskite cspbbr3 nanocrystals were coated with silica microspheres (0.5 μ m in diameter). Through this coating technology, the stability of the perovskite csppbbr3 nanocrystals has been greatly improved, no matter in room temperature or strong UV irradiation environment. In addition, the team has also constructed luminescent perovskite nanocrystalline microspheres that can be uniformly dispersed in water through a variety of polymer coating layer by layer assembly technology. The new ideas and technologies provided by this work can expand the applications of perovskite luminescent nanocrystals in many fields, such as bio imaging and sensing in high scattering media.
Relevant work is published online in chemnanomat,
DOI：10.1002/cnma.202000154
By Elena ushakova, Sergei chervkov, Anastasia Sokolova, YanXu Li, Ruslan azizov, Mikhail baranov, Dmitry kurdyukov, Ekaterina stovpiaga, Valery Golubev, Andrey L. rogach, Alexander baranov
Original link:
https://onlinelibrary.wiley.com/doi/10.1002/cnma.202000154
Wiley advanced science news official wechat platform
If you want to publish scientific research news or apply for information sharing, please contact asnchina@wiley.com.
Concern: add a friend to the upper right corner of the WeChat official account - search for "AdvancedScienceNews" or "long" click to identify the two-dimensional code.