Fig. 1: F-CE based CsPbI3 solar cell. | Nature Communications

Fig. 1: F-CE based CsPbI3 solar cell.

From: Regulating three-layer full carbon electrodes to enhance the cell performance of CsPbI3 perovskite solar cells

Fig. 1

a Schematic diagram of the F-CE. b Structure of the cell and the F-CE. Carbon quantum dots (CQDs) are used to engineer the rear interface. c Scheme image of the mesoporous carbon film modified with CQDs. d Photos of the CQDs solution and its photoluminescence, and high-resolution transmission electron microscope image of the CQDs. Scale bar: 10 nm. Inset: lattice fringe image. e Atomic force microscope morphology (AFM) and Kelvin probe force microscopy surface potential image of the mesoporous carbon film with and without CQDs treatment (The scale bar is 1 μm). f The distribution of surface potential of the mesoporous carbon film with different conditions. g Energy band alignment of the devices. The energy level of CsPbI3 layer was directly referred to UPS testing results from previous work33.

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