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Understanding carrier dynamics in CuInZnS3 quantum dots toward high-performance indoor photovoltaics


   Cardiff School of Physics and Astronomy

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  Dr BH Hou, Prof W W Langbein  Applications accepted all year round  Self-Funded PhD Students Only

About the Project

CuInZnS3 quantum dots (CIZS QDs) is a non-toxic and phosphide free material which has a significant potential to be used in wearable PVs and indoor PVs [1,2]. However, due to its emission properties apparently dominated by defects, its carrier dynamics are more complicated than binary metal chalcogenides and are not yet well understood. For instance, the origin of the light emission broadening is still unclear, with mechanism of poly-disperse size distribution and sub-bandgap states. The investigation of carrier dynamics in the ensemble, and within single dot emission spectroscopy not only can help us to understand the challenge of PL spectra broadening but also can provide deep insight regarding the band structures and carrier dynamics within this quaternary compound semiconductor QDs.

In this project, the student will be trained in synthesising CIZS QDs through continuous flow or heterogeneous [3] synthesis approach which are considered as the most promising techniques for fabrication large-scale colloidal QDs. Moreover, we will use the state-of-the-art laser micro-spectroscopy and ultrafast optical spectroscopy setups [4] to investigate the emission line-shape [5] and carrier dynamics of ensembles and single dots.

The student will also develop experimental skills and knowledge in optics & lasers by using femtosecond lasers systems and a complex optical setup, develop skills in programming by adapting the software to control the experiment, and perform data analysis and modelling using the knowledge on the physical processes involved.

Interested applicants can find out more about our PhD programme and apply via the following link: Physics and Astronomy - Study - Cardiff University

Please submit the following documents with your application:

  • All of your University level certificates and transcripts to date
  • Two references (at least one of these must be academic)
  • Your academic CV
  • Your personal statement

Funding Notes

Please note that bench fees may be charged in addition to tuition fees for this project. This will be confirmed as part of any formal offer for this project.

References

1. J. Mater. Chem. A, 2, 6879 (2014) DOI 10.1039/C4TA00285G
2. Chem. Eur. J. 19, 15847 (2013) DOI 10.1002/chem.201302722
3. J. Mater. Chem. C, 5, 3692 (2017) DOI 10.1039/C7TC00576H
4. Nano Lett. 18, 12, 7546-7551 (2018), DOI 10.1021/acs.nanolett.8b03027
5. J. Phys. Chem. Lett. 10, 18, 5468 (2019) DOI 10.1021/acs.jpclett.9b01824

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