Module manufacturer Trina Solar Ltd. says its State Key Laboratory of PV Science and Technology of China (SKL PVST) has set a new world conversion efficiency record of 22.61% for a high-efficiency p-type mono-crystalline silicon (c-Si) solar cell.
According to the company, the record-breaking solar cell was fabricated on a large-sized boron-doped Cz-Si substrate with an industrial process of advanced passivated emitter and rear cell (PERC) technology that integrates back surface passivation, front surface advanced passivation and anti-light-induced-degradation technologies. The 243.23 cm2 solar cell reached a total area efficiency of 22.61%, and the Fraunhofer ISE CalLab in Germany has independently confirmed the result.
Trina Solar notes this builds upon previous records, with the company having achieved a world conversion efficiency record of 21.40% for a large-area PERC mono-crystalline p-type solar cell in 2014. The company subsequently beat this with a 22.13% efficiency record in 2015. In July 2016, Trina Solar announced that its production lines were able to produce the same type of PERC solar cells in large volume with an average efficiency of 21.12%, which is only one percentage point less than the record efficiency that was achieved in 2015. Today, Trina Solar says it has broken its previous efficiency record by about a half percentage point, reaching the highest efficiency level to date for a PERC cell fabricated on a large-area p-type mono-crystalline substrate.
“We are very delighted to announce the latest achievement of our research team at the SKL PVST. Over the last few years, our R&D team has managed to continuously improve the efficiency of our mono- and multi-crystalline silicon PERC solar cells, pushing the limits of technology and surpassing our previous records,” says Dr. Pierre Verlinden, vice president and chief scientist of Trina Solar.
“We want to demonstrate all the possibilities of PERC technology on an industrial scale,” adds Verlinden. “In an innovation-driven PV industry, Trina Solar has been always focused on improving cell conversion efficiency and reducing system costs through the development of leading-edge PV technologies and products. Our goal is to insist on technological innovation, and transfer as quickly as possible the laboratory technology to commercial production.”
Notably, Trina Solar shareholders recently approved the manufacturer’s plan to become a private company.