Additive Engineering Modulated by Hydrogen Bonding for Highly Efficient and Stable Perovskite Solar Cells
In order to prepare high-performance perovskite solar cells,glycine hydrochloride(Gly+)was used to passivate thin films defects.The additive of Gly+ was introduced into the perovskite precursor solution.The intermolecular interaction between Gly+ and perovs-kite can effectively control the crystallization dynamic.Gly+ enlarges the grain size of per-ovskite films and improves the crystallinity.Dark current and steady-state luminescence(PL)measurements indicate that the additive reduces the nonradiative recombination of the device.Compared with the control device of 20.13%,the device based on perovskite film with Gly+ improves the efficiency up to 22.35%.Additionally,Gly+-based devices show improved air stability and thermal stability.
perovskite solar cellsglycine hydrochlorideadditivehydrogen bonding
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