Abstract
Colloidal perovskite nanocrystals comprised of all inorganic cesium lead halide (CsPbX3, X = Cl, Br, I or a mixture thereof) have potential as optical gain materials due to their high luminescence efficiency. In this work, cesium lead halide nanocrystals are continuously synthesized via a microreactor system consisting of poly(tetrafluoroethylene) (PTFE) capillaries. The synthesized nanocrystals possess excellent optical properties, including a full width at half maximum of 19-35 nm, high fluorescence quantum yield of 47.8-90.55%, and photoluminescence emission in the range of 450-700 nm. For the same precursor concentrations, the photoluminescence emission peak generally increases with increasing reaction temperature, revealing a controllable temperature effect on the photoluminescence characteristics of the synthesized nanocrystals. For quantum dots synthesized with a Br/I ratio of 1:3, a slight blue shift was observed for reaction temperatures greater than 100 °C. This PTFE-based microreactor system provides the unique capability of continuously synthesizing high-quality perovskite nanocrystals that emit over the full visible spectrum with applications ranging from displays and optoelectronic devices.
Original language | English |
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Pages (from-to) | 2521-2529 |
Number of pages | 9 |
Journal | Beilstein Journal of Nanotechnology |
Volume | 8 |
Issue number | 1 |
DOIs | |
State | Published - 2017 |
Bibliographical note
Publisher Copyright:© 2017 Zhang et al.
Keywords
- Cesium lead halide
- Microreactor system
- Nanocrystals
- Perovskite
- Photoluminescence
ASJC Scopus subject areas
- General Materials Science
- General Physics and Astronomy
- Electrical and Electronic Engineering