Continuous synthesis of CuInS2 quantum dots

被引:23
作者
Akdas, T. [1 ,3 ,4 ]
Haderlein, M. [1 ,3 ]
Walter, J. [1 ,3 ]
Zubiri, B. Apeleo [2 ,3 ]
Spiecker, E. [2 ,3 ]
Peukert, W. [1 ,3 ]
机构
[1] Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol LFG, Cauerstr 4, D-91058 Erlangen, Germany
[2] Friedrich Alexander Univ Erlangen Nurnberg FAU, Ctr Nanoanal & Electron Microscopy CENEM, Cauerstr 4, D-91058 Erlangen, Germany
[3] Friedrich Alexander Univ Erlangen Nurnberg FAU, Cluster Excellence Engn Adv Mat EAM, Nagelsbachstr 49b, D-91052 Erlangen, Germany
[4] CEA Grenoble, INAC, SyMMES, STEP, 17 Rue Martyrs, F-38054 Grenoble, France
关键词
SINGLE-SOURCE PRECURSORS; LUMINESCENT CDSE/ZNS NANOCRYSTALS; PARTICLE-SIZE DISTRIBUTION; SEMICONDUCTOR NANOCRYSTALS; COLLOIDAL NANOCRYSTALS; MICROFLUIDIC SYNTHESIS; OPTICAL-PROPERTIES; FLOW SYNTHESIS; T-MIXER; NANOPARTICLES;
D O I
10.1039/c6ra27052b
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In colloidal semiconductor nanocrystal synthesis, many activities have been focused on the control over the mean particle size of the product. However, for device applications additional requirements apply, e.g. the necessity for a narrow particle size distribution (PSD). In the present work, we investigate the impact of reactor characteristics on the synthesis of CuInS2 quantum dots (QDs). Therefore, the synthesis is carried out in three different reactors, namely in a fully scalable and continuous tubular reactor, in a commercial microreactor and in a batch three-neck round-bottom flask. All reaction products from the three reactor types have the same crystal structure and inorganic composition. Slight differences in optical properties are mainly ascribed to differences in the PSD, which is confirmed by sedimentation velocity experiments. Furthermore, the necessity for using different post-processing routines coupled with our findings by analytical ultracentrifugation (AUC) hint at changes in the organic matrix surrounding the CuInS2 QDs. Our study demonstrates the massive impact of heat transfer on the synthesis and the final PSD of CuInS2 QDs synthesized via heating-up and allows us to draw conclusions on their formation.
引用
收藏
页码:10057 / 10063
页数:7
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