Passivation in Perovskite Solar CellsApply
Perovskites are an emerging class of materials which offers a high-efficiency photovoltaics owing to its appealing optical and electronic properties. However, defects such asnon-coordinated ions at their grain boundaries and surfaces do contribute to non-radiative photo-carrier recombination. This undesirably inflates theopen-circuit voltage deficit and is a likely contributor to the widely reported phenomenon ofhysteresis in the current-voltage characteristics which is set to remain at the forefront of thecontinuing progress towards to the theoretical PCE limit of 30%. In this project, the candidate will have an opportunity to explore some new interfacial engineering strategies, such as surface passivation, grain boundary passivation and contact passivation to eliminate the defects. This will help to increase the open circuit voltage of the perovskite devices which will be employed to achieve champion perovskite/silicon tandem solar cells. At the end of the internship, the candidate(s) will be experienced the full processing steps of the perovskite solar cells and they may have an opportunity to publish the findings in well-respected scientific journals.
Program - Materials Science & Engineering
Division - Physical Sciences and Engineering
Center Affiliation - KAUST Solar Center
Field of Study - Solar Cells
Stefaan De Wolf
Associate Professor, Material Science and Engineering
Stefaan De Wolf's expertise lies in the science and technology of photovoltaics for terrestrial applications. His research focuses on the fabrication of high-efficiency silicon-based solar cells, with specific attention to the fundamental understanding of interface structures and electrical contact formation, relevant to solar cells and electronic devices.
He is also interested in new device architectures and applications, such as back-contacted solar cells and silicon-based multi-junction solar cells, aimed at the improved utilization of the full solar spectrum for electricity generation. A prime example of these devices are perovskite-silicon tandem solar cells.
Desired Project Deliverables
Exploring new passivation moleculesTesting conductive polymers which has carboxyl groups for passivation purpose Testing 2D perovskites for interface passivation purposeAchieving >1.2V open circuit voltage for 1.6 eV perovskite absorbers based solar cells