Sequential Ultrasonic Spray-Coating Planar Three Layers for 1 cm2 Active Area Inverted Perovskite Solar Cells

Li Hui Chou, Yu Tien Yu, Xiao Feng Wang, Itaru Osaka, Chun Guey Wu, Cheng Liang Liu

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The sequential deposition of a NiOx hole-transporting layer, one-step CH3NH3PbI3 perovskite absorber, and blended electron-transporting layer that comprises [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and PNDI(2OD)T2 via automated ultrasonic spray-coating technique is demonstrated in air for planar inverted p–i–n solution-processed perovskite solar cells. Films fabricated via laboratory-sale spin-coating and industrially compatible spray-coating process, respectively, are compared with each other to optimize both the film-coating quality and corresponding device performance. This is validated by the photovoltaic performance of prototype devices with three spray-coated layers with the active area of 1 × 1 cm2. The champion cells achieve a power conversion efficiency of 10.09%, which is one of the highest efficiencies obtained from fully spray-processed large-area perovskite solar cells thus far. Furthermore, these results reinforce the feasibility of the spray-coating methodology for the fabrication of multilayers within perovskite solar cells stack and low-cost route toward upscaling the manufacturing alternatives to spin coating.

Original languageEnglish
Article number2000216
JournalEnergy Technology
Volume8
Issue number7
DOIs
StatePublished - 1 Jul 2020

Keywords

  • large area perovskites
  • perovskite solar cells
  • spray coating

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