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Yang, Fu [Author]; Dong, Lirong [Author]; Brabec, Christoph J. [Author]; Egelhaaf, Hans‐Joachim [Author]; Jang, Dongju [Author]; Tam, Kai Cheong [Author]; Zhang, Kaicheng [Author]; Li, Ning [Author]; Guo, Fei [Author]; Li, Cong [Author]; Arrive, Charline [Author]; Bertrand, Mélanie [Author]

Fully Solution Processed Pure α‐Phase Formamidinium Lead Iodide Perovskite Solar Cells for Scalable Production in Ambient Condition

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  • Media type: E-Article
  • Title: Fully Solution Processed Pure α‐Phase Formamidinium Lead Iodide Perovskite Solar Cells for Scalable Production in Ambient Condition
  • Contributor: Yang, Fu [Author]; Dong, Lirong [Author]; Brabec, Christoph J. [Author]; Egelhaaf, Hans‐Joachim [Author]; Jang, Dongju [Author]; Tam, Kai Cheong [Author]; Zhang, Kaicheng [Author]; Li, Ning [Author]; Guo, Fei [Author]; Li, Cong [Author]; Arrive, Charline [Author]; Bertrand, Mélanie [Author]
  • Published: Wiley-VCH, 2020
  • Published in: Advanced energy materials 10(42), 2001869 - (2020). doi:10.1002/aenm.202001869
  • Language: English
  • DOI: https://doi.org/10.1002/aenm.202001869
  • ISSN: 1614-6840; 1614-6832
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: Manufacturing commercially viable perovskite solar cells still requiresappropriate low-temperature and scalable deposition processes to bedeveloped. While α-phase FAPbI3 has higher thermal stability and broaderabsorption than MAPbI3, there still is no report of a pure α-phase FAPbI3perovskite film obtained by a scalable printing method. Moreover, spontaneousconversion of the α-phase to non-perovskite δ-phase under ambientconditions poses a serious challenge for practical applications. Herein, ascalable and fully solution based printing method for the fabrication of pureα-phase FAPbI3 perovskite solar cells is reported. Through adding N-methylpyrrolidone and methylammonium chloride to the dimethylformamide basedprecursor solution to control the crystallization, and vacuum or air-flowassisted film drying, pure α-FAPbI3 phase is obtained by doctor blading. Theresulting α-FAPbI3 film is highly stable, with no δ-FAPbI3 phase being formedeven after keeping it in an ambient atmosphere over a period of 200 dayswithout encapsulation. In addition, a fully solution processed PSC with aPCE of 16.1% is processed by the vacuum assisted method, and 17.8% by theair-flow assisted method. Replacing silver with a printed carbon electrodeprovides a stable PCE up to 15% for the vacuum assisted and 16.4% for the airflowassisted method, which is the highest performance of FAPbI3 solar cellsto date. Compared with MAPbI3, the fully printed FAPbI3 perovskite devicesexhibit a remarkable thermal stability in humid atmospheres which makesthem a promising candidate for scalable production and commercialization.
  • Access State: Open Access