10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Highly Reproducible Large-Area Perovskite Solar Cells Fabricated with Megasonic Spray-Coating
MINCHEOL PARK, Woohyung Cho, Mansoo Choi, Seoul National University
Abstract Number: 1090 Working Group: Materials Synthesis
Abstract The thin-film solar cells using organometal halide perovskite have been establishing rapid rise in efficiency as a highly promising photovoltaic device for solar energy conversion. State-of-the-art devices achieved power conversion efficiencies (PCEs) of 22.1 %; this value surpassing the record efficiencies of amorphous silicon and organic semiconductor PV. As development of perovskite solar cells (PSCs), there have been few reports of scalable film-coating techniques being applied to the deposition of large-sized perovskite films. It is apparent that the path towards commercialization of solution-processed perovskite solar cells requires the development of fabrication methods for linear coating techniques such as roll-to-roll or sheet-fed processing techniques. Large-scalable coating techniques such as aerosol spray, slot-die, inkjet printing, and blade coating show the capability to scalable coat perovskite thin films1, 2.
Herein, we report a highly promising technique using aerosol coating method generated by megasonic nebulizer also known as megasonic spray coating (MSC). By adapting MSC, efficient and reproducible large-area planar perovskite solar cells (PSCs) were successfully developed. The coating based on mist precursor can be easily operated with low-temperature and antisolvent-free process under ambient conditions. And it can effectively control the volume of CH3NH3PbI3 precursor solution and the reaction temperature, which affect the quality of perovskite harvester layers and the performance of perovskite solar cells remarkably. Under optimized condition, the power conversion efficiency (PCE) of devices reach 17.0 % with the average PCE of 16.4 %. The megasonic spray method is also used to fabricate large-area solar cells (1 cm2) and a PCE of 14.2 % is obtained.
[1] S. C. Hong, G. Lee, K. Ha, J. Yoon, N. Ahn, W. Cho, M. Park and M. Choi, ACS applied materials & interfaces, 2017, 9, 7879-7884. [2] M. Yang, Z. Li, M. O. Reese, O. G. Reid, D. H. Kim, S. Siol, T. R. Klein, Y. Yan, J. J. Berry and M. F. van Hest, Nature Energy, 2017, 2, 17038.