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Spraying the ETL technology applied in perovskite materials
- Jun 26, 2018 -

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Figure 1.The models of perovskite solar cells show different levels.

A group of researchers from New York University, Peking University, China University of Electronic Science and Technology, Yale University and Johns Hopkins University claimed that through spray coating technology, they have solved major challenges in the commercial production of perovskite solar cells. Scientists said that spray coating can evenly spread the electron transport layer (ETL) over large areas of material, making it suitable for the manufacture of large-scale solar panels and ensuring higher performance. 

In an article published in the authoritative chemical journal Nanochemistry, the team said spray coating can increase ETL efficiency to 30% over other methods, resulting in a power conversion efficiency that jumps from 13% to 17%, and Can reduce defects.

The commercial use of perovskite is partly due to the difficulty in effectively applying a uniform ETL layer on the perovskite crystalline surface. These researchers chose the PCBM compound (a fullerene derivative with the formula [6,6]-phenyl-C61-butyric acid methyl ester) to ensure better conductivity and make the interface contact difficult to penetrate. Light traps are enhanced.

Andre D. Taylor, an associate professor of chemistry and biomolecule engineering at the Tundra College of Engineering at New York University, said that the method they used was "simple, reproducible, and highly scalable", which indicates that the spraying of PCBM ETL will improve the perovskite. The solar cell's efficiency baseline has broad appeal and provides an ideal platform for future pin-perovskite solar cell breaking efficiency records.