Effect of Self-Assembled Monolayer Treated ZnO on the Photovoltaic Properties of Inverted Polymer Solar Cells

-carbazol-9-yl)benzoic acid (Cz-BA) as anelectron transporting layer show improved the performances. It is mainly attributed to the favorable interfacedipole at the interface between ZnO and the active layer, the eective passivation of the ZnO surface traps,decrease of the work function and facilitating transport of electron from PCBM to ITO electrode. The powerconversion eciency (PCE) of iPSCs based on DPA-BA and Cz-BA treated ZnO reaches 2.78 and 2.88%,respectively, while the PCE of the device based on untreated ZnO is 2.49%. The open circuit voltage values(