Amorphous (lysine)<sub>2</sub>PbI<sub>2</sub> layer enhanced perovskite photovoltaics.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39154032.
- Also identified by DOI 10.1038/s41467-024-51551-y and PMC identifier 11330473.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Passivation materials play a crucial role in a wide range of high-efficiency, high-stability photovoltaic applications based on crystalline silicon and state-of-the-art perovskite materials. Currently, for perovskite photovoltaic, the mainstream passivation strategies routinely rely on crystalline materials. Herein, we have invented a new amorphous (lysine)<sub>2</sub>PbI<sub>2</sub> layer-enhanced halide perovskite. By utilizing a solid phase reaction between PbI<sub>2</sub> and lysine molecule, an amorphous (lysine)<sub>2</sub>PbI<sub>2</sub> layer is formed at surface/grain boundaries in the perovskite films. The amorphous (lysine)<sub>2</sub>PbI<sub>2</sub> with fewer dangling bonds can effectively neutralize surface/interface defects, achieving an impressive efficiency of 26.27% (certified 25.94%). Moreover, this amorphous layer not only reduces crystal lattice stress but also functions as a barrier against the decomposition of organic components, leading to suppressed de-structuring of perovskite and highly stable perovskite solar cells.