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Issue 18, 2016
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Nature inspiring processing route toward high throughput production of perovskite photovoltaics

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Abstract

We report our results of developing perovskite thin films with high coverage, improved uniformity and preserved crystalline continuity in a single pass deposition. This approach, inspired by the natural phenomena of tears of wine, works by regulating the hydrodynamics of the material comprising of droplets during spray-pyrolysis. In contrast to conventional spray-pyrolysis where droplets dry independently and form a rough morphology, the use of binary solvent system creates localized surface tension gradients that initiate Marangoni flows, thus directing the incoming droplets to spontaneously undergo coalescing, merging and spreading into a continuous wet films before drying. By systematically exploring the dynamics of spreading and drying, we achieve spray-coated perovskite photovoltaics with power conversion efficiency of 14.2%, a near two-fold improvement than that of the spray-pyrolysis counterpart. Of particular significance is the fact that the single pass deposition technique unveils novel inroads in efficient management of lead consumption during deposition.

Graphical abstract: Nature inspiring processing route toward high throughput production of perovskite photovoltaics

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Publication details

The article was received on 07 Dec 2015, accepted on 18 Feb 2016 and first published on 22 Feb 2016


Article type: Paper
DOI: 10.1039/C5TA09992G
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2016,4, 6989-6997
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    Nature inspiring processing route toward high throughput production of perovskite photovoltaics

    H. Ishihara, S. Sarang, Y. Chen, O. Lin, P. Phummirat, L. Thung, J. Hernandez, S. Ghosh and V. Tung, J. Mater. Chem. A, 2016, 4, 6989
    DOI: 10.1039/C5TA09992G

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