A Nonionic and Low-Entropic MA(MMA)nPbI3-Ink for Fast Crystallization of Perovskite Thin Films

Kai Wang, Congcong Wu, Yuchen Hou, Dong Yang, Wenjie Li, Guodong Deng, Yuanyuan Jiang, Shashank Priya

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Conventional processing of the halide perovskite usually utilizes ionic precursor solutions containing mobile precursor ions in a high-boiling-point solvent. The assembly of these disordered ions into low-entropic crystals needs to overcome the large thermodynamic energy barrier. Traditional processes rely on high-temperature annealing and complex anti-solvent treatments to overcome this barrier, but they remain highly uncontrollable. Here, we report a novel nonionic and low-entropic MA(MMA)nPbI3 ink for fast perovskite crystallization with superior {110} preferred orientation and a high Lotgering factor. And the ink-based films exhibit an extraordinary long carrier diffusion length of 4.6 μm at the single-crystal level. With facial one-step processing, the corresponding photovoltaic cell exhibits a record efficiency of 21.8% based on the MAPbI3-system. Scaling of active area from 0.096 to 0.5 cm2 did not deteriorate the cell performance as the efficiency remained over 21%. These results demonstrate the potential of this nonionic ink for the industrial transition of perovskite photovoltaic technology.

Original languageEnglish (US)
Pages (from-to)615-630
Number of pages16
Issue number3
StatePublished - Mar 18 2020
Externally publishedYes

Bibliographical note

Funding Information:
K.W. and Y.H. acknowledge the support from AFOSR Biophysics and Natural Materials programs through award number FA9550-18-1-0233. W.L. acknowledges the support from the DARPA NETS program. Y.J. acknowledges support from ONR through grant number N000141712520 . S.P. acknowledges the financial support from the Office of Naval Research (I. Perez) through grant number N000141613043 and the SBIR program through Nanosonic. D.Y. acknowledges the support from NSF-Crest grant number HRD 1547771 .

Publisher Copyright:
© 2020 Elsevier Inc.


  • MAPbI3
  • fast crystallization
  • high efficiency
  • nonionic ink
  • perovskite film
  • solar cell
  • stable


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