Scalable deposition of high-efficiency perovskite solar cells by spray-coating
journal contributionposted on 30.05.2018, 10:28 by Sona Ulicna, Benjia Dou, Dong H. Kim, Kai Zhu, Michael WallsMichael Walls, Jake BowersJake Bowers, Maikel F.A.M. van Hest
Spray-deposition is a low-cost, roll-to-roll compatible technique that could potentially replace spin-coating for the deposition of highly efficient perovskite solar cells. Here, perovskite active layers were fabricated in air using an ultrasonic spray system and compared with equivalent spin-coated films. A chlorine-containing perovskite ink with a wide processing window coupled with an antisolvent extraction resulted in perovskite films with relatively rougher surfaces than those spin-coated. A power conversion efficiency (PCE) of 17.3% was achieved with an average of 16.3% from 24 devices. Despite observing differences in film roughness and structure, the performance of sprayed perovskite solar cells was comparable to that of the spin-coated cells processed in an inert atmosphere, showing the versatility of perovskite processing.
We acknowledge the EPSRC Supergen SuperSolar Hub (EP/J017361/1) as well as a grant no. EP/N026438/1 for funding a 3 month secondment for S.U. at the National Renewable Energy Laboratory in Colorado. This research is based upon work supported in part by the Solar Energy Research Institute for India and the U.S. (SERIIUS) funded jointly by the U.S. Department of Energy subcontract DE AC36-08G028308 (Office of Science, Office of Basic Energy Sciences, and Energy Efficiency and Renewable Energy, Solar Energy Technology Program, with support from the Office of International Affairs) and the Government of India subcontract IUSSTF/JCERDCSERIIUS/2012 dated 22nd Nov. 2012.
- Mechanical, Electrical and Manufacturing Engineering