Tailoring solvent coordination for high-speed, room-temperature blading of perovskite photovoltaic films.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31840067.
- Also identified by DOI 10.1126/sciadv.aax7537 and PMC identifier 6897546.
- Licence recorded as CC BY-NC.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The efficiencies of small-pixel perovskite photovoltaics have increased to above 24%, while most reported fabrication methods cannot be transferred to scalable manufacturing process. Here, we report a method of fast blading large-area perovskite films at an unprecedented speed of 99 mm/s under ambient conditions by tailoring solvent coordination capability. Combing volatile noncoordinating solvents to Pb<sup>2+</sup> and low-volatile, coordinating solvents achieves both fast drying and large perovskite grains at room temperature. The reproducible fabrication yields a certified module efficiency of 16.4%, with an aperture area of 63.7 cm<sup>2</sup>. This method can be applied for various perovskite compositions. The perovskite modules also show a small temperature coefficient of -0.13%/°C and nearly fully recoverable efficiency after 58 cycles of shading, much better than commercial silicon and thin-film solar modules.