Fast vaporizing anti-solvent for high crystalline perovskite to achieve high performance perovskite solar cells

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Thin Solid Films, ISSN: 0040-6090, Vol: 661, Page: 122-127

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Gi-Hwan Kim; Jaeki Jeong; Hyungsu Jang; Jae Won Kim; Jin Young Kim
Elsevier BV
Materials Science; Physics and Astronomy; Perovskite solar cells; Anti-solvent; Morphology; Boiling point; Surface coverage
article description
We have deeply studied vaporized anti-solvents effects on the perovskite solar cell performance. Various non polar anti-solvents were tested to achieve the high quality perovskite film. Depending on the boiling point of the anti-solvent, the surface morphology is dramatically changed. In case of high boiling point anti-solvent, 1,2-dichlorobenzene (180.5 °C) remains on the perovskite surface even after thermal annealing at 100 °C for 10 min. However, the low boiling point chloroform (61.2 °C) anti-solvent makes smooth surface morphology of the perovskite film which leads the high performance of perovskite solar cells. This report introduces the vaporization of the anti-solvent affect the surface morphology that needs careful optimization for high performance perovskite solar cells.