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.
- Cathode-buffer layer
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films