South Korea's Sookmyung Women's University has successfully developed a second-generation perovskite photovoltaic cell

Recently, the research team of Prof. Cui Jingmin and Prof. Park Minyu of the Department of Chemical Life and Life Sciences of Korea's Sookmyung Women's University used low-temperature processes to develop high-efficiency flexible photovoltaic cells. The research team stated that this research utilizes titanium-based metal organic framework materials and has developed perovskite-type flexible photovoltaic cells with novel metal oxide electron transport layers.

The research was supported by research projects of new researchers from the Korean Research Consortium and global doctoral program. The relevant results have been published in the American Chemical Society's "ACS?Nano" journal. The paper titled "Nanocrystalline Titanium metal-Organic frameworks for Highly Efficient and Flexible Perovskite Solar Cells, a titanium nanocrystalline metal organic framework material for highly efficient and flexible perovskite photovoltaic cells.

Perovskite-type photovoltaic cells are second-generation photovoltaic cells, which have high light energy conversion efficiency and low production cost. As the second-generation energy application technology has attracted much attention in the industry, existing photovoltaic cells use an electron transport layer of titanium oxide, which requires high temperatures. The heat treatment cannot ensure the stability of the flexible photovoltaic cell skeleton material. As of now, the flexible photovoltaic cell needs to adopt a complicated treatment process and the production cost is high.

The research team developed nano-metal organic framework materials with a size less than 6nm, which are regularly arranged by titania clusters. The electron transport layer greatly improves the electron transport capacity and bending performance. It can also perform cryogenic processes at room temperature, and at the same time ensure the skeleton materials. Stability, thereby developing a new type of flexible perovskite photovoltaic cells. In addition, low-cost manufacturing can be achieved in a short time by rotating the coating process. It is worth mentioning that compared with rigid photovoltaic cells with ITO conductive glass and flexible photovoltaic cells with plastic substrates, the energy efficiency increased by 18.94% and 17.43%, respectively, and after 700 bending tests, higher performance can still be ensured.

Professor Cui Jingmin said that in the future, titanium-based nano-metal organic framework materials will be applied to the production of multi-sided photovoltaic cells through in-depth research. The goal is to develop high-performance flexible photovoltaic cells at low cost.

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