Carbon-Nanodots-Doped passivation defect for enhanced efficiency Perovskite Solar Cells

An effective organic-inorganic perovskite film is fabricated using carboxylic-acid and hydroxyl-rich carbon nanodots (CDs) to dope low-temperature solution-processed FACsPbI₃, which dramatically decrease its defects of perovskite crystal growth and film formation. Fabricated perovskite solar cells (PSCs) based on this CDs modified demonstrate an outstanding improvement in efficiency from 16.44% for PSCs without CDs up to 17.69%. These significant achievements are solely attributed to the filling of defects by carbon dots, which is also proven to help the passivation of traps/defects at the perovskite film and to promote the formation of highly crystallized perovskite, with an enhanced phase purity and uniformity over a large area.