Incorporating Potassium Citrate to Improve the Performance of Tin‐Lead Perovskite Solar Cells
نویسندگان
چکیده
Easy-to-form tin vacancies at the buried interface of tin-lead perovskites hinder performance low-bandgap perovskite solar cells (PSCs). Here, a synergistic strategy by incorporating potassium citrate (PC) into poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) hole-transport layer to passivate Sn-Pb PSCs is reported. PC neutralizes acidity PEDOT:PSS and stabilizes front surface, enhancing device stability. Citrate moieties coordinate with Sn2+ on preventing oxidation suppressing defect formation. Additionally, cations incorporate perovskites, crystallinity passivating halide defects. The combined benefits enable efficient power conversion efficiency 22.7% high open-circuit voltage 0.894 V. Using this method, 26.1% for all-perovskite tandem demonstrated. These results emphasize significance passivation in developing stable cells.
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ژورنال
عنوان ژورنال: Advanced Energy Materials
سال: 2023
ISSN: ['1614-6832', '1614-6840']
DOI: https://doi.org/10.1002/aenm.202301218