UNSW Achieves Record Efficiency in Kesterite Solar Cell
Researchers at the University of New South Wales (UNSW) have achieved a groundbreaking advancement in solar photovoltaic technology by setting a new world record efficiency for kesterite solar cells. These cells, which have the potential to enhance solar energy technology in the long term, reached an unprecedented efficiency of 13.2 per cent.
As part of a global initiative to improve the efficiency of solar cells, the engineers from UNSW’s School of Photovoltaic and Renewable Energy Engineering focused on high bandgap kesterite solar cells. By incorporating hydrogen into the cells, they were able to surpass previous efficiency levels. Kesterite, a mineral that can be artificially created using copper, zinc, tin, and sulphur, offers a cost-effective and environmentally friendly alternative to rare and expensive materials traditionally used in solar cells.
Enhancing Efficiency Through Innovation
Despite the advantages of kesterite, its efficiency has been limited by defects introduced during the manufacturing process. To address this challenge, the UNSW team, led by Scientia Professor Xiaojing Hao, employed a technique known as annealing in a hydrogen-rich environment. This method proved effective in mitigating defects and improving the overall efficiency of the solar cells.
Professor Hao emphasised the importance of developing more efficient and affordable solar energy solutions to meet the growing demand for renewable energy. By exploring new materials like kesterite, researchers aim to surpass the limitations of current silicon-based solar cells and pave the way for the next generation of solar technology.
Paving the Way for Future Innovations
By introducing hydrogen during the production process, the UNSW team successfully increased the efficiency of CZTS solar cells, marking a significant milestone in solar cell technology. Professor Hao envisions further advancements in efficiency, with the goal of achieving 15 per cent efficiency within the next year and potential commercialisation by 2030.
While challenges remain in reducing defects in CZTS, Professor Hao remains optimistic about the material’s potential as a sustainable and efficient option for solar energy generation. With its abundance, environmental friendliness, and promising optoelectronic properties, CZTS holds great promise for the future of solar technology.
Professor Hao’s team’s breakthrough not only represents a significant step towards enhancing solar cell efficiency but also underscores the importance of sustainable and innovative solutions in the transition to renewable energy sources.
