Figure2 (IMAGE)

Kanazawa University

Figure2

Caption

(a) The schematic diagram and (b) corresponding energy levels of the investigated single-junction planar perovskite solar cell. Top-view scanning electron microscopy (SEM) micrographs of (c) spray-pyrolysis deposited TiO<sub>2</sub> compact layer (the inset shows the cross-sectional view of the TiO<sub>2</sub>), and (d) perovskite film deposited on TiO<sub>2</sub>-CL/FTO substrate. The TiO<sub>2</sub> precursor solution has a concentration of 0.35 M and a thickness of 70 nm.

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Kanazawa University

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