Key Findings
Researchers in Germany have achieved a groundbreaking milestone in next-generation solar cell technology. They successfully fabricated indium-free perovskite-silicon tandem solar cells using an innovative low-damage reactive plasma deposition (RPD) process. This advanced technique resulted in a certified efficiency of 33.6% for small-area devices and an impressive 31.0% certified efficiency for mini-modules. This accomplishment is a significant step towards the commercialization of perovskite solar cells, as it substantially reduces material costs by replacing expensive indium with cheaper and more abundant tin oxide, all while preserving high conversion efficiency.
Technical / Clinical Details
The core of this research lies in replacing Indium Tin Oxide (ITO), a widely used transparent conductive oxide (TCO), with readily available and inexpensive tin oxide (SnO₂). Indium-free technology offers substantial benefits in both resource sustainability and cost reduction. However, a challenge with using SnO₂ as a TCO has been the potential for its deposition process to damage underlying perovskite or silicon materials. The research team overcame this by developing a low-damage RPD process. RPD is a plasma-based thin-film deposition technique that allows for precise control over deposition temperature and plasma conditions. This minimizes damage to the underlying layers while forming high-quality, highly transparent SnO₂ films. Consequently, the high conversion efficiency and stability of the overall perovskite-silicon tandem cell were ensured.
Background & Context
Perovskite-silicon tandem solar cells are considered the most promising candidates for next-generation photovoltaics, offering the potential to surpass the theoretical efficiency limit of single-junction silicon solar cells (approximately 29%). However, maintaining high efficiency, ensuring long-term stability, and reducing manufacturing costs are crucial for their commercialization. Indium, being a rare and expensive material, makes indium-free development critically important for significantly lowering manufacturing costs and mitigating supply chain risks. This German research outcome enhances the attractiveness of perovskite tandem technology from both cost and performance perspectives, widely opening the path for its large-scale adoption. This marks a vital step forward for the broader deployment of solar power and the realization of a sustainable energy society.
Strategic Significance & Outlook
The development of indium-free perovskite-silicon mini-modules achieving 31% efficiency has the potential to redefine the future of photovoltaic technology. Future research and development will likely focus on further optimizing the RPD process and validating its applicability for larger-scale commercial module production. Strengthening long-term reliability tests and evaluating performance under various environmental conditions will also be essential. If this technology gains widespread adoption, it is expected to further reduce the installation cost of solar power, accelerating the deployment of renewable energy in more countries and regions. This will contribute significantly to enhancing energy security and combating global climate change.
Get our weekly technology intelligence — free
Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.
Subscribe Free — Weekly Tech Intelligence
By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.
- Your email and selected fields are used only to deliver the newsletter.
- We never share your information with third parties.
- You can unsubscribe anytime via the link in each email.
See our Privacy Policy for details.
Takes about a minute · Unsubscribe anytime
Comments