Translating gas/solvent-assisted perovskite film formation from spin-coating in the glovebox to scalable manufacturing methods under ambient conditions
Dechan Angmo a, Xiaojin Peng a, Chuantian Zuo a, Youn-Jung Heo a, Mei Gao a, Doojin Vak a
a Commonwealth Scientific and Industrial Research Organisation, Australia
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Benidorm, Spain, 2018 May 28th - 31st
Organizers: Emilio Palomares and Rene Janssen
Oral, Dechan Angmo, presentation 116
DOI: https://doi.org/10.29363/nanoge.hopv.2018.116
Publication date: 21st February 2018

Organic-inorganic metal halide hybrid perovskites in solar cells, or simply “perovskite solar cells (PeSCs)” are poised to revolutionize the photovoltaics industry. Record power conversion efficiency (above 22% in the laboratory) achieved by exploiting the key processing merits of perovskites – their inherent solution-processability and low-temperature sintering requirements – promises a disruptive breakthrough by lowering the cost of energy output. The challenge now lies in maintaining the high efficiencies achieved in the laboratory while advancing the core processing merits of perovskites through an industry-relevant scalable manufacturing method and environment. Most laboratory cells are processed in an inert atmosphere and make the use of spin-coating methods for the deposition of the numerous functional layers comprised in the solar cell. Both practices represent cost bottlenecks to delivering the goal of cheap power: spin coater is not scalable to a continuous processing scheme while maintaining inert environment in industrial-scale manufacturing would be costly as well as limiting to operational-freedom. Fast and continuous manufacturing making use of scalable printing and coating methods in an ambient environment combined with low temperature drying steps epitomizes the ideal low-cost high-throughput production method for harnessing perovskites’ full potential. Depending on the intended application, both sheet-to-sheet fabrication on glass and roll-to-roll fabrication on flexible substrates can be envisioned. A planar device configuration in which the perovskite film is deposited in a one-step process in combination with the use of an anti-solvent or gas-assisted quenching remains the simplest and a cost-effective method. These methods are arguably the most commonly used approaches to generate uniform, pinhole-free perovskite films in the laboratory. In this talk, we will present our experience in translating gas and antisolvent-assisted perovskite film formations to industry-relevant scalable fabrication methods for the fabrication of one-step planar devices. Both laboratory batch-to-batch processing on glass and roll-to-roll on flexible substrate with the use of scalable coating methods under ambient conditions will be discussed.

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