Scalable Hole Transport Materials for Roll-to-Roll Perovskite Photovoltaic Modules

Wednesday, 16 October 2019: 11:20
Room 224 (The Hilton Atlanta)
B. Martin, A. H. Ghahremani, and T. Druffel (University of Louisville)
Toxicity, stability, and scalability of perovskite solar cells are the three main challenges hindering commercialization of the technology. Multiple coating and printing techniques have been used to produce high-throughput solution-based perovskite photovoltaics, but there are unique challenges and opportunities that arise in upscale from a laboratory scale (<1 cm2) to an industrial scale (>1 m2). One limit of scale is the difficulty of deposition and cost of hole-transport materials (HTMs) in a perovskite solar cell (PSC). 2,2',7,7'-Tetrakis-(N,N-di-4-methoxyphenylamino)-9,9'-spirobifluorene (Spiro-OMeTAD) is the most commonly used HTM; however, the cost per gram of this material makes large scale production practically impossible. Additionally, transition metal oxides have shown promise as HTMs, but they require high temperature annealing, which is not compatible with the perovskite material. This work is an attempt to replace the current HTMs with a less expensive material that can be annealed at low temperatures. This study can aid in the commercialization and development of high-throughput solution-based perovskite photovoltaic modules.