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Perovskite Solar Cells
In article 2106118, Kuan Sun and co‐workers describe how a thin biguanide hydrochloride (BGCl) film is deposited at the SnO2/perovskite interface for simultaneous interfacial modification and crystallization control. Due to passivation to the oxygen vacancies and hydrogen bond anchoring between BGCl and SnO2/PbI2, reduced interfacial defects and homogeneous perovskite crystallites...
Interfacial modification, which serves multiple roles, is vital for the fabrication of efficient and stable perovskite solar cells. Here, a multifunctional interfacial material, biguanide hydrochloride (BGCl), is introduced between tin oxide (SnO2) and perovskite to enhance electron extraction, as well as the crystal growth of the perovskite. The BGCl can chemically link to the SnO2 through Lewis...
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