5 years ago

Electrochemical deposition of PbI2 for perovskite solar cells

Electrochemical deposition of PbI2 for perovskite solar cells
In this work, PbI2 is coated on the TiO2 films via the cost-effective electrochemical deposition method and a MAPbI3 layer is formed by exposing the deposited PbI2 to CH3NH3I subsequently. The structure, composition and morphology of the deposits are characterized in detail by the measurements of X-ray diffraction, scanning electron microscopy, and energy dispersion spectroscopy, respectively. The results suggest that a high coverage and uniform perovskite layer has been fabricated by virtue of the electrochemical deposition method. The influence of the deposition time in the morphology of the obtained perovskite is investigated and the optical properties of the prepared PbI2 and CH3NH3PbI3 are studied as well. As a result, the assembled perovskite solar cells exhibited a maximum PCE of 6.62% with the corresponding photocurrent of 12.5 mA cm−2 and open-circuit voltage of 0.957 V at AM 1.5 solar light of 100 mW cm−2, thus demonstrating the feasible application of electrochemical deposition in perovskite solar cells.

Publisher URL: www.sciencedirect.com/science

DOI: S0038092X1730957X

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