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(a) Transmission spectra of the ZnO interlayers deposited onto the ITO electrode which were annealed at 150 °C for 10 min in glove box and the ITO substrates. (b) An AFM image of the ZnO films from the aqueous precursor. (c) Transfer curve of TFTs based on the ZnO films from the aqueous precursor.
(a) Schematic view of the structure of the inverted solar cell. (b) J-V curve of the champion device.
Effects of UV-ozone treatments on the ZnO interlayers. (a) UPS spectra of annealed ZnO film with (black squares) or without UV-ozone treatments (red circles). (b) J-V curves and (c) Jph-Veff curves for inverted solar cells using ZnO interlayers with (red circles) and without (black squares) UV-ozone treatments. The arrows in (c) indicate the short-circuit photocurrent densities and the corresponding compensation voltages of the two devices. (d) Interfacial band alignment between ZnO interlayers and the photoactive layer before (solid line) and after (dashed line) UV-ozone treatment.
Photovoltaic performance of the inverted solar cells and the reference devices.
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