Template-Assisted Growth of High-Quality α-Phase FAPbI<sub>3</sub> Crystals in Perovskite Solar Cells Using Thiol-Functionalized MoS<sub>2</sub> Nanosheets.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39441588.
- Also identified by DOI 10.1021/acsnano.4c11268.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Formamidinium lead iodide (FAPI) has gained attention for hybrid perovskite solar cell (PSC) applications due to its enhanced stability and narrow bandgap. However, a significant challenge remains in inducing and stabilizing the elusive perovskite "black phase"─photoactive cubic α-FAPI─as the relatively bulky FA<sup>+</sup> cations tend to favor the thermodynamically stable nonphotoactive "yellow phase". In this study, we present a templated growth strategy employing thiol-functionalized MoS<sub>2</sub> nanosheets as templates. By introduction of 3-mercaptopropionic acid (MPA)-functionalized MoS<sub>2</sub> as a growth template, precise control over crystal formation was achieved, favoring the growth of high-quality α-FAPI films. These advanced templated films exhibited substantial improvements in charge transport properties, efficient light absorption, and enhanced charge extraction. As a result, the PSCs achieved a significantly enhanced power conversion efficiency (PCE) compared to the nontemplated control device, increasing from 20.6 to 22.5%. The MoS<sub>2</sub>-incorporated device also demonstrated excellent shelf stability, maintaining 91% of the initial PCE even after 1600 h of storage without device encapsulation.