U.S. Develops New Bulk Copolymer Solar Cells

According to a report published by the Physicist Organization Network on May 29th, a research team led by Rafael Verduzzi from Rice University and Angliqui Gomes from Penn State University has developed a new type of solar cell using bulk copolymers—self-assembling organic materials that can form distinct layers on their own. Although the current photoelectric conversion efficiency of this new cell is only 3%, it still outperforms other polymer-based solar cells. The researchers believe this innovative approach could open up a new area in solar energy technology. Their findings were recently published in the journal *Nano Express*. Verduz noted that while commercial silicon-based solar cells currently achieve an efficiency of around 20%, with lab-tested versions reaching up to 25%, scientists have been exploring polymer-based alternatives since the mid-1980s. These polymers are expected to significantly cut down the cost of solar power. However, progress has been slow. In recent years, a polymer-polyfullerene blend achieved a 10% efficiency, but polyfullerene itself presents handling challenges. Verduz explained, “Bulk copolymers show great promise for organic solar cells, yet very few researchers have used high-mass copolymers to create efficient photovoltaic devices. We believe that with the right materials and proper assembly conditions, we can develop highly efficient solar cells.” At Rice University, researchers discovered that a specific bulk copolymer, P3HT-b-PFTBT, can self-organize into 16-nanometer-wide bands. What caught the team’s attention was its natural ability to align perpendicularly on glass surfaces. They fabricated the copolymer on a glass/indium tin oxide (ITO) substrate at 165°C. The material was placed at one end of a device created by Penn State researchers, with an aluminum layer added at the opposite end. This setup allowed the copolymer bands to span from the top to the bottom electrode, creating a clear path for electron flow. Moving forward, the team plans to test other bulk copolymers and explore ways to control their structure to enhance light absorption and electricity generation. For now, their main focus is improving the performance of these solar cells, as better performance will help address other issues like stability. Verduz added, “It's relatively easy to encapsulate a solar cell to protect it from air and moisture, but UV protection remains a challenge because the cell must be exposed to sunlight. It's unavoidable.” The researchers hope that once they enhance the performance of these copolymer-based solar cells, they will be able to find long-term applications for them. (Liu Xia)

Subsea Gaskets

Subsea Gaskets ,Api17D Gasket,Sbx Ring Gasket,Subsea Gasket

WENZHOU JINGWEI SEAL TECHNOLOGY CO., LTD , https://www.ringjoint-gasket.com