Self-assembled materials with an ordered hydrophilic bilayer for high performance inverted Perovskite solar cells.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39747047.
- Also identified by DOI 10.1038/s41467-024-55523-0 and PMC identifier 11696008.
- Licence recorded as CC BY-NC-ND.
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Abstract
While self-assembled material based inverted perovskite solar cells have surpassed power conversion efficiencies of 26%, enhancing their performance in large-area configurations remains a significant challenge. In this work, we report a self-assembled material based hole-selective layer 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid, with a π-expanded conjugation. The enhanced intermolecular π-π interactions facilitate the self-assembly of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid molecules to form an ordered bilayer with a hydrophilic surface, which passivates the buried perovskite interface defect and enables high-quality and large-area perovskite preparation, while simultaneously enhancing interfacial charge extraction and transport. The certified efficiency of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid based small-area (0.0715 cm<sup>2</sup>) device is 26.39% with high stability. Furthermore, a certified efficiency of 25.21% is achieved for a 99.12 mm<sup>2</sup> large area device.