Improved performance of inverted perovskite solar cells due to the incorporation of zirconium acetylacetonate buffer layer

Aditya S. Yerramilli, Yuanqing Chen, Andrew Knight, Banashree Gogoi, Lingwei Li, Yang Song, Yuxia Shen, Terry Alford

Research output: Contribution to journalArticle

1 Scopus citations


We demonstrated the use of an additional cathode layer of zirconium acetylacetonate (ZAC) prepared in IPA for Perovskite solar cells (PSC) and achieved a power conversion efficiency of 15.2%, which is about 25% higher when compared to a control device with only PCBM. Our results indicated that IPA was the best alcohol-based solvent to obtain a smooth film and also prevented any corrosion of the underlying layers. We investigated the surface effects of adding the layer and also realized an optimized concentration of 1.5 mg/ml was best for device efficiency as well as reduced the RMS to 3 nm. Dark-current time-resolved photoluminescence measurements were used to understand the effect of the thickness and concentration of the ZAC layer on the performance of the device.

Original languageEnglish (US)
Article number109927
JournalSolar Energy Materials and Solar Cells
StatePublished - Sep 15 2019
Externally publishedYes



  • Alcohol-soluble
  • Cathode-buffer layer
  • Perovskite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Cite this