4.6 Article

Solar perovskite thin films with enhanced mechanical, thermal, UV, and moisture stability via vacuum-assisted deposition

Journal

JOURNAL OF MATERIALS SCIENCE
Volume 55, Issue 8, Pages 3484-3494

Publisher

SPRINGER
DOI: 10.1007/s10853-019-04199-9

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Funding

  1. Research Fund for DPST Graduate with First Placement, Institute for the Promotion of Teaching Science and Technology [005/2558]
  2. EGAT NSTDA [FDA-CO-2560-5449-TH]
  3. Thailand Research Fund OHEC [MRG61]
  4. CIF Grant, Faculty of Science, Mahidol University

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Perovskites are promising solution processible materials widely used for solar cell application. We developed a vacuum-assisted deposition (VAD), which allowed spin-coating process under different vacuum conditions. Via two-step deposition for perovskite solution, VAD affects evaporation rate during deposition and perovskite formation. VAD improved all key properties necessary for optoelectronics like morphology, UV-visible absorption, and crystallinity along with UV, thermal, and moisture stability. Moreover, perovskite films became harder with VAD, paving the way for high mechanical stability. VAD opened a new door for high stability, dense perovskite films and could be adapted for various perovskite compositions for optoelectronic application.

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