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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Tailoring the Mesoscopic TiO2 Layer: Concomitant Parameters for Enabling High-Performance Perovskite Solar Cells

Fig. 2

Scanning electron microscopy images showing the TiO2 nanostructures with the PbI2 pre-coating and MAPbI3(Cl) infiltration into the polystyrene-templated TiO2 scaffold. a Plan and cross-sectional view of bare TiO2. b PbI2-pre-coated bare TiO2. c Plan and cross-sectional view of TiO2 made from the 1:2 wt. % ratio of PS/TiO2 (PS/TiO2 = 1:2). d PbI2-pre-coated TiO2 from PS/TiO2 = 1:2. e Cross section of MAPbI3(Cl) in TiO2 and the magnified view

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