Scalable Production of High Performance Flexible Perovskite Solar Cells via Film-Growth-Megasonic-Spray-Coating System
Mincheol Park a b, Yeoun-Woo Jang a b, Minsung Han a b
a Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
b Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 151-744, Republic of Korea
Poster, Mincheol Park, 099
Publication date: 25th November 2019

Aspiration for commercialization of flexible-substrate based perovskite solar cells (f-PSCs) has strongly required effective scalable-coating-system for flexible perovskite solar cells. Due to low wettability of conventional flexible-electrode-substrates, the systems have not yet shown significant advancement. In this work, we have developed a continuous and automated Film-Growth-Megasonic-Spray-Coating (FGMSC) system that can uniformly grow perovskite film on the flexible substrates through ultrafine perovskite precursor droplets (< 10 μm) and appropriate coating mechanism. With complete automation, we have successfully coated pinhole-free and uniform perovskite films with large grains on the flexible substrate. The FGMSC system has fabricated flexible perovskite solar cells with impressive power conversion efficiencies of 18.24% with high reproducibility. We have also confirmed scalability of our system by coating of perovskite layer on the large-area (100cm2) flexible substrate. The results have proved that the FGMSC system which can conduct continuous and scalable process has high potential to realize commercialization of f-PSCs.

This work has been supported by the Global Frontier R&D Program of the Center for Multiscale Energy Systems funded by the National Research Foundation under the Ministry of Education, Science and Technology, Korea (2012M3A6A7054855).

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