The RMIT University research team is working alongside leading scientists from Australia and Japan to pioneer the next generation of solar cell technology. Their collaborative efforts are focused on developing more efficient, affordable, and environmentally friendly photovoltaic solutions using advanced nanotechnology.
This joint initiative, involving RMIT, the Commonwealth Scientific and Industrial Research Organisation (CSIRO), and the Japan Science and Technology Agency (JST), aims to reduce both material costs and environmental impact in solar cell production. The team has been exploring the use of low-cost semiconductor nanocomposites for printable solar cells, with recent findings published in the prestigious *Journal of the American Chemical Society*—a top-tier publication in the field of chemistry.
Led by Professor Yasuhiro Tachibana from RMIT’s School of Aerospace, Mechanical and Manufacturing Engineering, the research team is dedicated to creating sustainable alternatives that can meet industry demands. “The photovoltaic industry has always focused on reducing material and production costs,†said Professor Tachibana. “Developing new, low-cost, and low-toxicity materials is essential for the future of solar technology.â€
Colloidal nanocrystals offer a promising path forward, as they can be easily adapted into printer-friendly “inks.†However, current materials often rely on toxic elements like cadmium or lead. To address this, the team is investigating safer alternatives, such as copper and antimony, which are not only abundant but also less harmful.
In addition to Professor Tachibana, the team includes experts like Professor Joel van Embden and Professor Kay Latham, who are all working to develop synthetic nanocrystal alternatives. “Synthesizing new nanocrystals remains one of the biggest challenges,†noted Dr. van Embden. “But we believe that incorporating elements like copper and antimony will lead to significant breakthroughs.â€
Recent discoveries include beryllium-copper and eutectic-copper-based colloidal nanocrystals known as CAS. These materials are dark brown and highly effective at absorbing visible and infrared light, making them ideal for use in solar cells.
The nanocrystal solutions can be integrated into thin films, which can then be used in photovoltaic devices, thermoelectric materials, and transistors. According to Professor Tachibana, these materials offer a cost-effective alternative to traditional manufacturing methods.
Currently, the team has confirmed that these nanocrystalline thin films can generate electricity when exposed to sunlight. This development marks a significant step toward more sustainable and scalable solar energy solutions.
The *Journal of the American Chemical Society*, founded in 1876, is one of the most respected scientific publications globally, with over 163,000 members. It is widely recognized for publishing high-impact research in chemistry and related fields. The publication of this paper in such a prestigious journal underscores the quality and significance of the RMIT team's work.
Professor Xinghuo Yu, director of the RMIT Platform Technology Research Institute, praised the achievement, stating, “This publication reflects the exceptional level of research conducted by the team.†He added, “The collaboration brings together top scientists to tackle important global challenges, and their work will have a lasting impact on the industry and society.â€
With continued progress, the team's innovations in nanomaterials and solar technology could revolutionize how we produce and use renewable energy.
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