Qi JIANG

Qi Jiang has been dedicated to Metal Halide Perovskite materials and photovoltaic device research for years, particularly in enhancing the efficiency and stability of perovskite solar cells (PSCs).

Qi and her team tackled a series of key scientific challenges in the production process of PSCs. By electron transport layers (ETLs) modulation, defect passivation, and bulk crystallization quality control, they achieved breakthroughs on both single-junction and tandem solar cells efficiencies and stabilities.

In 2022, Qi and her team developed a novel surface engineering approach that selectively performs in-situ reactions with the perovskite film surface, which multi-functionally optimizes the interface between perovskite and the electron transport layer. The approach enabled stable, high-performance inverted (p-i-n) PSCs with a power conversion efficiency exceeding 25%. In the same year, they discovered that a combination of a gentle gas quenching method and rapid crystallization of bromide-rich perovskite could induce the columnar growth and result in high quality wide bandgap perovskite film with low defect density. Solar cells based on these films could maintain 95% of its maximum efficiency after over 1100 hours of operation under 65°C and light-soaking.

In 2023, Qi and her team conducted research on the outdoor aging behavior and indoor accelerated aging stability of PSCs. They explored the impact of light exposure and high temperatures of indoor aging experiments and identified these factors as critical stressors for predicting operational stability under outdoor conditions, which will accelerate the commercialization process by establishing a stability evaluation model for PSCs.

Nowadays, she and her team will continue to work on reliable stability studies of PSCs, and they are also advancing researches on perovskite-silicon tandem solar cells.

Her research has not only further improved the laboratory efficiency and stability records of PSCs but also advanced the practical application of related technologies, including the optimization of p-i-n structures and the development of perovskite-based tandem solar cells.