Semitransparent Perovskite Solar Cells with an Evaporated Ultra‐Thin Perovskite Absorber

Zongbao Zhang, Ran Ji, Xiangkun Jia, Shu‐Jen Wang, Marielle Deconinck, Elena Siliavka, Yana Vaynzof*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

4 Citations (Scopus)

Abstract

Metal halide perovskites are of great interest for application in semitransparent solar cells due to their tunable bandgap and high performance. However, fabricating high‐efficiency perovskite semitransparent devices with high average visible transmittance (AVT) is challenging because of their high absorption coefficient. Here, a co‐evaporation process is adopted to fabricate ultra‐thin CsPbI3 perovskite films. The smooth surface and orientated crystal growth of the evaporated perovskite films make it possible to achieve 10 nm thin films with compact and continuous morphology without pinholes. When integrated into a p‐i‐n device structure of glass/ITO/PTAA/perovskite/PCBM/BCP/Al/Ag with an optimized transparent electrode, these ultra‐thin layers result in an impressive open‐circuit voltage (VOC) of 1.08 V and a fill factor (FF) of 80%. Consequently, a power conversion efficiency (PCE) of 3.6% with an AVT above 50% is demonstrated, which is the first report for a perovskite device of a 10 nm active layer thickness with high VOC, FF and AVT. These findings demonstrate that deposition by thermal evaporation makes it possible to form compact ultra‐thin perovskite films, which are of great interest for future smart windows, light‐emitting diodes, and tandem device applications.
Original languageEnglish
Article number2307471
Number of pages11
JournalAdvanced Functional Materials
DOIs
Publication statusE-pub ahead of print - 29 Oct 2023

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Electrochemistry
  • Biomaterials

User-Defined Keywords

  • co-evaporation process
  • CsPbI3
  • semitransparent perovskite solar cells
  • transparent electrodes
  • ultra-thin perovskites

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