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johnrennceo
Grünschnabel
Level: 1 
Erfahrungspunkte: 2
Nächster Level: 10
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| Breakthrough Betavoltaic Cell Offers Long-Term Power for Extreme Environments |
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A research team has developed the world’s first next-generation betavoltaic cell by integrating a radioactive isotope electrode directly with a perovskite absorber layer. By embedding carbon-14-based quantum dots into the electrode and optimizing the crystallinity of the perovskite material, the researchers achieved both high energy conversion efficiency and stable power output.
The study, led by Professor Su-Il In from the Department of Energy Science & Engineering at DGIST, was published in Chemical Communications. This innovative technology provides a reliable and long-lasting power source that doesn’t require recharging, making it a promising solution for applications that demand sustained power autonomy, such as space missions, implantable medical devices, and defense systems.
As electronic devices become smaller and more precise, there is increasing demand for energy solutions that reduce dependence on frequent recharging. Existing battery technologies, including lithium and nickel-based cells, suffer from short life spans and vulnerability to environmental stressors like heat and moisture. In contrast, betavoltaic cells, which generate electricity by harnessing beta particles from radioactive decay, offer long-term performance—potentially lasting years or even decades—without maintenance.
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Beta particles have the added benefit of being biologically safe, as they are unable to penetrate human skin. Despite this, real-world deployment of betavoltaic cells has been hindered by difficulties in material stability and the handling of radioactive substances.
To overcome these barriers, the research team designed a hybrid system using a carbon-14 isotope electrode paired with a highly efficient perovskite absorber. By finely tuning the perovskite crystal structure and incorporating additives like methylammonium chloride (MACl) and cesium chloride (CsCl), they dramatically enhanced the charge transport properties. The resulting device showed a 56,000-fold increase in electron mobility compared to earlier systems and delivered stable power for up to nine continuous hours.
"This is the first time a practical betavoltaic cell has been demonstrated," said Professor Su-Il In. "We aim to accelerate the development and commercialization of next-generation energy technologies suited for extreme conditions, while also working toward further miniaturization and technology transfer."
Co-first author and doctoral student Junho Lee added, "Despite the daily challenges we face in this work, we are motivated by a deep sense of purpose—our efforts contribute to the future of national energy security."
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