Not All That Glitters Is Gold: Metal-Migration-Induced Degradation in Perovskite Solar Cells
Swiss Federal Laboratories for Materials Science and Technology · École Polytechnique Fédérale de Lausanne · +2 more institutions
Abstract
Perovskite solar cells (PSCs) have now achieved efficiencies in excess of 22%, but very little is known about their long-term stability under thermal stress. So far, stability reports have hinted at the importance of substituting the organic components, but little attention has been given to the metal contact. We investigated the stability of state-of-the-art PSCs with efficiencies exceeding 20%. Remarkably, we found that exposing PSCs to a temperature of 70 °C is enough to induce gold migration through the hole-transporting layer (HTL), spiro-MeOTAD, and into the perovskite material, which in turn severely affects the device performance metrics under working conditions. Importantly, we found that the main…
Citation impact
- FWCI
- 74.20
- Percentile
- 100%
- References
- 51
Authors
9Topics & keywords
- Materials science
- Perovskite (structure)
- Degradation (telecommunications)
- Layer (electronics)
- Metal
- Thermal stability
- Energy conversion efficiency
- Nanotechnology