ACAP congratulates UNSW researchers Xutao Wang and Soma Zandi who were two of 16 Student Award Finalists at EUPVSEC 2024, the largest PV conference in Europe, in Vienna in September.
The awards are delivered in recognition of “the most remarkable and outstanding research work in the field of PV”.
Both students were recipients of ACAP support or used ACAP facilities to carry out their research.
In all, 34 researchers from UNSW SPREE gave presentations at the conference, many of whom have been supported by ACAP through research grants or use of ACAP funded facilities.
Student Award Finalist Xutao Wang Laser-Assisted Firing in High Volume Production: A Game Changer for Industrial TOPCon Solar Cells
UNSW PhD student Xutao Wang and collaborators studied efficiency improvements in commercial TOPCon solar cells in partnership with Jolywood, a Chinese module manufacturer.
They examined laser-assisted firing technology's impact on cell performance, a technique that has shown lab-level success but lacks extensive loss analysis. The study demonstrated that laser-assisted firing significantly boosts TOPCon solar cell efficiency by 0.6%abs and reduces contact recombination at both front and rear contacts.
Simulations confirmed improved Voc of the cells and suggested further efficiency gains by enhancing bulk resistivity, front surface passivation, and grid design. This work highlights the potential of laser-assisted firing for industrial applications.
Wang and team used the powerfully precise LOANA solar cell analysis system at UNSW, part of ACAP’s suite of world class research facilities, to study the performance of the JSIM cells.
Student Award Finalist - Soma Zandi
Implied Voltage of Sub-cells in Tandem Devices from Luminescence Images – The Beauty of Using a Narrow Bandpass Filter
UNSW PhD student Soma Zandi’s research focuses on using luminescence measurements to quantify implied voltage (iV) images in Silicon (Si) and perovskite/Si (PVK/Si) tandem solar cells. Traditional calibration methods rely on absorptivity or external quantum efficiency data, which pose challenges, especially for tandem cells with varying optical properties.
By using two calibration cells with narrow bandpass filters, this study achieved accurate (below 1%) iV imaging without needing precise absorptivity or EQE data.
This approach enables rapid, contactless assessment of loss sources in individual sub-cells, supporting advancements in tandem solar technology for better efficiency, reliability, and scalability in solar PV development.
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