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- W4313252574 abstract "The interfacial coupling between donor and acceptor is crucial for exciton generation in bulk-heterojunction organic solar cells along with the charge carrier extraction capability of electrode buffer layers (EBLs). Here, we demonstrate an efficient nanoscale technique using photoconductive atomic force microscope (pc-AFM) to quantify the effect of EBL precisely on solar cell performance similar to tomography in medical science. A photoactive layer of PBDB-T-2Cl:PC61BM deposited over transparent electrode passivated by a thin layer of electron blocking molybdenum oxide (MoO3) or hole blocking zinc oxide (ZnO) is investigated. The pc-AFM results under different applied bias voltages and incident light colours strongly resemble that the ZnO works better for hole filtering than the MoO3 for electrons. Interestingly, PBDB-T-2Cl:fullerene film shows excellent spatiotemporal photo-switching at nanoscale and better solar cell performance with ZnO as cathode buffer layer. The signature of trap filling into the electrode buffer layer during light soaking is also visualised at nanoscale using this pc-AFM technique. Accordingly, we have achieved reasonably high open-circuit voltage (VOC) and a good performance stability up to 84 days using fullerene as the acceptor. Finally, our approach using pc-AFM technique could have enormous implications ahead to inspect various components of solar cells more accurately at nanoscale for improving performance further." @default.
- W4313252574 created "2023-01-06" @default.
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- W4313252574 date "2023-03-01" @default.
- W4313252574 modified "2023-09-24" @default.
- W4313252574 title "Efficient carrier-filtering performance probing of oxide buffer-layers in organic solar cell at nanoscale" @default.
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- W4313252574 doi "https://doi.org/10.1016/j.orgel.2022.106728" @default.
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