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Modulating the structure and property of hole‐transporting organic semiconductors is of paramount importance for high‐efficiency and stable perovskite solar cells (PSCs). This work reports a low‐cost peri‐xanthenoxanthene based small‐molecule P1, which is prepared at a total yield of 82 % using a three‐step synthetic route from the low‐cost starting material 2‐naphthol. P1 molecules stack in one‐dimensional...
A low‐costperi‐xanthenoxanthene‐based hole‐transporter has been developed for highly efficient and stable perovskite solar cells (PSCs). With strong π–π interactions, the planar π‐conjugated two‐dimensional heterocycles form core‐to‐core stacking, building a firm bridge between the perovskite and anode for holes to pass through. PSCs employing this new hole transporter attain a high efficiency of...
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