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Scalable production of CuInS2/ZnS quantum dots in a two-step droplet-based microfluidic platform

Title
Scalable production of CuInS2/ZnS quantum dots in a two-step droplet-based microfluidic platform
Author
주재범
Keywords
LIGHT-EMITTING-DIODES; LARGE-SCALE SYNTHESIS; ONE-POT SYNTHESIS; SEMICONDUCTOR NANOCRYSTALS; FLOW REACTOR; COLLOIDAL NANOCRYSTALS; CU2ZNSNS4 NANOCRYSTALS; MULTISTEP SYNTHESIS; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE
Issue Date
2016-08
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY C, v. 4, NO. 26, Page. 6401-6408
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.
URI
https://pubs.rsc.org/en/Content/ArticleLanding/2016/TC/C6TC02057G#!divAbstracthttp://repository.hanyang.ac.kr/handle/20.500.11754/76422
ISSN
2050-7526; 2050-7534
DOI
10.1039/c6tc02057g
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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