Scalable production of CuInS2/ZnS quantum dots in a two-step droplet-based microfluidic platform
- Authors
- Yashina, Alexandra; Lignos, Ioannis; Stavrakis, Stavros; Choo, Jaebum; deMello, Andrew J.
- Issue Date
- Jul-2016
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY C, v.4, no.26, pp 6401 - 6408
- Pages
- 8
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY C
- Volume
- 4
- Number
- 26
- Start Page
- 6401
- End Page
- 6408
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/45672
- DOI
- 10.1039/c6tc02057g
- ISSN
- 2050-7526
2050-7534
- Abstract
- We report the scalable formation of CuInS2/ZnS nanocrystals using a two-stage microfluidic reactor integrated with a real-time optical detection system, which is able to monitor reaction parameters prior and subsequent to the addition of the shell material. By injecting a ZnS single source precursor in droplets containing CuInS2 cores and without the need of purification steps, we are able to obtain core-shell nanocrystal populations emitting between 580 and 760 nm with significant narrower size distributions (90-95 nm) than for the same material systems synthesized on the macroscale. In-line monitoring allowed for rapid assessment of optimum reaction parameters (Cu/In, S/(Cu + In), Zn/(Cu + In) molar ratios, temperatures and reaction time) and enabled the formation of CuInS2/ZnS nanocrystals with high photoluminescence quantum yields (similar to 55%) within a few seconds. We believe that this synthetic methodology will be of significant utility in controllable production of ternary and quaternary metal chalcogenides, complex core-shell and doped nanostructures.
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Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
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