Fluoroethylamine engineering for reliable passivation improves performance of perovskite solar cells

• Perovskite film, a crucial layer of the perovskite solar cell (PSC), determines the performance and stability of the gadget.

In the prep work procedure of PSCs, numerous issues will undoubtedly be introduced at the grain boundaries and user interfaces, which will certainly function as non-radiative recombination centers and seriously damage the efficiency and security of PSCs.

Lately, a research study team led by Prof. Liu Shengzhong from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) and his cooperators incorporated fluoroethylamine (FEA) cations right into the perovskite film to develop extremely reliable and stable perovskite solar cells (PSCs).

This research study was released in Advanced Energy Materials on June 23.

The scientists located that perovskite film with FEA passivation boosted photoluminescence (PL) intensity, prolonged carrier-lifetime, subdued nonradiative recombination, bigger grain size and hydrophobicity, and for this reason delivered high device efficiencies.

By engineering of various amounts of fluorine in the molecule, they revealed that various quantities of fluorine ingredients presented a slope circulation in the film. The tool employing 2-fluoroethylamine (1FEA) achieved a performance of 23.40%, while the device employing 2, 2, 2-trifluoroethylamine (3FEA) revealed the very best ecological security, keeping 87% of their initial effectiveness after 1200 h.

"This research study leads a new way to produce high-efficiency and stabile PSCs," claimed Prof. LIU.