Perovskite Interface Engineering to Increase Open Circuit Voltage By Ionic Liquid Crystal
The substrate of perovskite solar cells(PSC)is crucial.After modifying nickel oxide(hole transport layer)with the self-assembled small-molecule,surface by[2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic acid mismatched with perovskite.By modifying the buried interface,ionic liquid crystal(ILC),1-dodecyl-3-methylimidazolium tetrafluoroborate,improves interface contact,interacts with lead iodide,enhance s crystal quality and minimizes voltage loss.The open circuit voltage of PSC increased from 1.10 eV to 1.15 eV,and the power conversion efficiency increased from 19.48%to 20.81%.This provides a new approach for the buried interface engineering of inverted PSC.
ionic liquid crystalburied interfacecrystal growthopen-circuit voltage
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