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Perovskite Solar Cell Manufacturing Solutions
Strategic cooperation alliance consulting
To achieve commercial production of perovskite solar cells, perovskite manufacturing needs to be scaled up. Making the process scalable and repeatable can increase yields and enable perovskite photovoltaic modules to meet or exceed photovoltaic level-cost targets. At the same time, the efficiency of existing solar cells has increased by 55% to 75%.
RCPRC
Perovskite solar cells are thin-film devices built with layers of materials, either printed or coated from liquid inks or vacuum-deposited. Producing uniform, high-performance perovskite material in a large-scale manufacturing environment is difficult, and there is a substantial difference in small-area cell efficiency and large-area module efficiency. The future of perovskite manufacturing will depend on solving this challenge, which remains an active area of work within the PV research community.
RCPRC
The methods used to produce lab-scale perovskite devices are not easily scalable, and we are working to apply scalable methods to perovskite manufacturing. For thin film technology, it can be divided into two main production types
Spin coating is not suitable for industrial-scale fabrication.
We developed a small-scale slot-die coater to fabricate perovskite cells in the lab using a deposition process that is transferable to industry.
We have improved the process for making perovskite solar cells, reducing the formation of pinholes and cracks.
Perovskite solar cells (PSCs) have the potential to produce solar energy at a low cost, with flexibility, and high power conversion efficiency (PCE).
Precursor ink design & solvents for perovskite film fabrication
ACN TEP DMSO GVL (GBL) EtOH 2-ME Eco-friendly fabrication process for perovskite films Green antisolvent IPA IsobutanolEA Diethyl carbonate limonene & 2-MeTHF Antisolvent-free fabrication with use of DMF Vacuum Spin coating Inkjet printing Gravure printing Antisolvent-free fabrication with no use of DMF D-bar coating + N 2 blowing, ACN Spin coating, ACN Blade coating, ACN + 2ME Blade coating, MAAcs
Because the formation of the perovskite layer should be done by controlled crystallization, the usage of antisolvent is inevitable to obtain high-quality films. The amount of antisolvent used to fabricate a perovskite layer is much larger than the amount of solvent, and consequently the harmful antisolvent has a more severe effect on humans and the environment.
Alcohols are the primary choice as green solvent except water in general. As an antisolvent, alcohols have been used frequently, despite the risk of dissolving a small amount of lead halide and selective dissolution of organic halide precursor. IPA, sec-butanol [54] or iso-butanol [55] have been used as an antisolvent. Shan et al.
