On May 19, according to the news from Hainan University, its New Energy Photovoltaic (PV) Materials and Devices Team from the School of Physics and Optoelectronic Engineering has made phased progress in the research and development of new-type PV devices. Authorized by the National Photovoltaic Industry Metrology and Testing Center, the certified efficiency of the perovskite solar cells independently developed by the team reached 26.92%, just 0.03% below the latest world record efficiency of 26.95% for single-junction perovskite solar cells announced by the US National Renewable Energy Laboratory (NREL).

It is reported that certification efficiency of perovskite solar cells is an internationally recognized core technical indicator that is verified by authoritative institutions under standard testing conditions. Its slight improvement always indicates a substantial breakthrough in underlying technologies, particularly in material design and device processes, and has become an essential indicator for global perovskite research and development teams to compete for.

The research team stated that the “dual helix” model that integrates the standardized process flow with original technical solutions is the key to achieving efficiency breakthroughs. The high-throughput experimental platform for energy optoelectronic intelligent collaboration developed by the team has been deployed with an automated spin coating preparation system for perovskite thin films, achieving standardization of the preparation process via digital control of process parameters. Meanwhile, the team has also made theoretical innovations in key scientific fields based on the microphysical mechanism research of perovskite photovoltaic devices, and constructed a novel theoretical framework for device performance optimization.

Dong Bitao, a researcher in the team, pointed out, “The current improvement in efficiency value verifies the feasibility of the technical route, but the industrialization of perovskite photovoltaic technology still faces critical challenges, including long-term stability and large-scale preparation.”

Next, the team at Hainan University will continue to improve high-throughput experimental platform for energy optoelectronic intelligent collaboration, and plan to accomplish a full chain technology loop of “computational design-intelligent preparation-precise detection” by the end of 2025.

Translated by Liu Jian

Proofread by Bai Lifang