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


Project Description

Project description: 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.

Start date: October 2020. 4 years Full Time.

How to Apply:

Applicants should submit an application for postgraduate study via the Cardiff University webpages (https://www.cardiff.ac.uk/study/postgraduate/research/programmes/programme/physics-and-astronomy) including:

• an upload of your CV
• a personal statement/covering letter
• two references
• Current academic transcripts

Applicants should select Doctor of Philosophy, with a start date of October 2020

In the research proposal section of your application, please specify the project title and supervisors of this project and copy the project description in the text box provided. In the funding section, please select the ’self -funding’ option.

Candidates should hold a good bachelor’s degree (first or upper second-class honours degree) or a MSc degree in Physics or a related subject.

Applicants whose first language is not English will be required to demonstrate proficiency in the English language (IELTS 6.5 or equivalent).

Funding Notes

Self-Funded PhD Students Only


This PhD position is opening for self-funded student only, which means the candidate with own funding to cover the living cost and tuition fees will be considered.

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

How good is research at Cardiff University in Physics?

FTE Category A staff submitted: 19.50

Research output data provided by the Research Excellence Framework (REF)

Click here to see the results for all UK universities

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