Double molecular bridges enable charge transport in perovskite solar cells (IMAGE)
Caption
Illustration of the self-organizing phenomenon of 4-F-PEAFa and the charge density difference. The red color circle (dash line) denotes the iodide vacancy and the Fa is prone to occupy this position. The 4-F-PEA occupies the FA at the dual sides of the perovskite. The blue regions represent electron accumulation, while the yellow regions indicate electron loss.
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