Reaction engineering studies of the continuous synthesis of CuInS 2 and CuInS 2 /ZnS nanocrystals

Tian, Shizhe; Fu, Min; Hoheisel, W.; Mleczko, Lesław

doi:10.1016/j.cej.2015.12.086

Cited by 23 publications

(18 citation statements)

References 52 publications

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“…This phenomenon has been also reported by other researchers [22][23][24][25][26]. This effect seems to be specific for ZnS shell because, for the overcoating with CdS, a red shift has been reported [24].…”

Section: Blue-shift Effectsupporting

confidence: 62%

“…PL QY exhibits a clear maximum of about 6% for the synthesis time of 60 min. Obviously, there is a need for a further improvement of the synthesis of core nanoparticles, as higher yields have been reported, usually up to 10% [18,23,34], but also extraordinary high values of 28% [22]. The wavelength of this maximum amounted to about 654 nm (i.e.…”

Section: Synthesis Of Cis Core Particlesmentioning

confidence: 99%

“…All of them produce high-quality CIS QDs in terms of monodispersity, crystallinity, and high photoluminescence (PL) efficiency. Recently, Tian et al [22] developed a cost-efficient continuous process for the synthesis of core CIS based on microreaction technology, and the obtained maximum PL quantum yield (QY) was about 28%. However, the PL QY of pure CIS nanoparticles is still far from commercial applications.…”

Section: Introductionmentioning

confidence: 99%

“…To improve the PL QYs of CIS nanoparticles, ZnS is typically used as a shell to decrease CIS surface defects that can trap exciton, thus inducing a nonradiation transition. Several methods aiming at the growth of ZnS shell were developed, and the process parameters such as reaction time of CIS core, shell growth time, Cu/In feed ratio, Zn/Cu feed ratio, and types of shell were studied and optimized to improve the PL QY of QDs [22][23][24][25][26]. Different types of ligands were used in the synthesis of CIS/ZnS QDs by several groups.…”

Section: Introductionmentioning

confidence: 99%

“…CIS or CIS/ZnS QDs with spherical, triangle, rod-like, hexagonal, and spindle shapes were synthesized using different ligands such as TOP, oleylamine (OLA), DDT, DMF, OA, and trioctylphosphic oxide (TOPO) [22][23][24][25][26][27][28][29][30][31][32]. Until now, the PL QYs of CIS/ZnS in the reach stage have been up to more than 80% [24,25,27,33].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the recipe for the synthesis of CuInS₂/ZnS nanocrystals supported by mechanistic considerations

Luan

et al. 2016

Green Processing and Synthesis

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CuInS 2 /ZnS (CIS/ZnS) quantum dots (QDs) with high photoluminescence (PL) were synthesized via a facile solvothermal approach. Gaussian deconvolution of PL spectra, transmission electron microscopy, and timeresolved PL spectroscopies were used to characterize the emission properties of the prepared CIS and CIS/ZnS QDs. It was found that the growth of ZnS can reduce the surface defect acting as traps to minimize donor-acceptor emissions, and the contribution of band to donor/acceptor transition becomes a dominating emission with the increase of shell growth time. The blue shift of PL emission wavelength of CIS/ZnS QDs underwent two steps: the dramatic blue shift originated from the decreased fraction donor-acceptor transition due to the reduction of surface defects at the beginning and the subsequently mild blueshift with the time from the interdiffusion of CIS and ZnS. The effect of trioctylphosphine (TOP) and dodecanethiol (DDT) as ligands during shell growth on the optical properties of QDs were investigated and compared. The PL quantum yield (QY) of CIS core affects the final value of CIS/ ZnS QDs, and the higher PL QY is achieved while using CIS core with higher PL QY. Based on the selected ligand DDT, the reaction parameters, such as CIS core reaction time, shell growth time, and Zn/Cu feed molar ratio, were further optimized. CIS/ZnS QDs with high PL QY can be obtained with a Zn/Cu feed molar ratio larger than 4, shell growth time of 30 to 90 min, and shell growth temperature 220°C-240°C, and the maximum value was up to about 80% by adjusting the above-mentioned parameters.

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Section: Blue-shift Effectsupporting

confidence: 62%

Section: Synthesis Of Cis Core Particlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimization of the recipe for the synthesis of CuInS₂/ZnS nanocrystals supported by mechanistic considerations

Luan

et al. 2016

Green Processing and Synthesis

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Microfluidic Tools for the Synthesis of Bespoke Quantum Dots

Hsiao

Howes

et al. 2019

Nanotechnology and Microfluidics

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Neural network modeling and simulation of the synthesis of CuInS₂/ZnS quantum dots

Mrziglod

Luan

et al. 2020

Engineering Reports

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The development of recipes for synthesis of quantum dots (QDs), a novel semiconductor material for application in optoelectronic devices, is currently purely based on experiments. Since the quality of QDs represented by quantum yield (QY) and emission peak strongly depends on a number of different parameters (route, precursors, conditions, etc), a large number of experiments is necessary. In this article, we show that data‐driven modeling can be used as a supporting tool for optimization and a better understanding of the synthesis process. By using the results collected during the development of CuInS2/ZnS (CIS/ZnS) QDs, a neural network model has been established. The model is able to predict the optical properties (QY and emission peak) of CIS/ZnS QDs as a function of the most important synthesis parameters, such as reaction temperature, time of CIS core formation and ZnS shell growth, feed molar ratio of Cu/In and Zn/Cu, various starting precursors, and types of ligands. Finally, a model analysis under various effects influencing the quality of QDs is performed.

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Reaction engineering studies of the continuous synthesis of CuInS 2 and CuInS 2 /ZnS nanocrystals

Cited by 23 publications

References 52 publications

Optimization of the recipe for the synthesis of CuInS₂/ZnS nanocrystals supported by mechanistic considerations

Optimization of the recipe for the synthesis of CuInS₂/ZnS nanocrystals supported by mechanistic considerations

Microfluidic Tools for the Synthesis of Bespoke Quantum Dots

Neural network modeling and simulation of the synthesis of CuInS₂/ZnS quantum dots

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Reaction engineering studies of the continuous synthesis of CuInS 2 and CuInS 2 /ZnS nanocrystals

Cited by 23 publications

References 52 publications

Optimization of the recipe for the synthesis of CuInS2/ZnS nanocrystals supported by mechanistic considerations

Optimization of the recipe for the synthesis of CuInS2/ZnS nanocrystals supported by mechanistic considerations

Microfluidic Tools for the Synthesis of Bespoke Quantum Dots

Neural network modeling and simulation of the synthesis of CuInS2/ZnS quantum dots

Contact Info

Product

Resources

About

Optimization of the recipe for the synthesis of CuInS₂/ZnS nanocrystals supported by mechanistic considerations

Optimization of the recipe for the synthesis of CuInS₂/ZnS nanocrystals supported by mechanistic considerations

Neural network modeling and simulation of the synthesis of CuInS₂/ZnS quantum dots