In this work, we introduce P3HT (poly(3-hexylthiophene-2,5-diyl)) as an efficient hole transport material (HTM) for lead-free Cs3Sb2I9 perovskite-inspired solar cells. The P3HT doubles the power conversion efficiency (PCE) of the solar cells (PCE = 2.5% for the champion device) by improving all of the figures of merit: the fill factor, open-circuit voltage, and the short-circuit current. The maximum power point tracked efficiency was 2.0%, which is the highest so far reported for this type of solar absorber. The discovery of an efficient HTM for Cs3Sb2I9 is an important step in advancing safer lead-free perovskite-inspired solar cells.
|Number of pages||6|
|Journal||Sustainable Energy & Fuels|
|Early online date||1 Dec 2021|
|Publication status||Published - 2022|
|Publication type||A1 Journal article-refereed|
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