Article contents
Effect of excessive Pb on the stability and performance of Pb-halide perovskite solar cells against photo-induced degradation
Published online by Cambridge University Press: 28 December 2018
Abstract
Perovskite solar cells have evolved significantly since their inception. However, stability is still a major concern. We fabricated devices using a glass/ITO/PEDOT:PSS/MAPbI3/PCBM/Ag device configuration. Devices fabricated using the Pb-acetate precursors showed an efficiency of 13%. This work reports the effect of adding excess lead to the precursor and its impact on the light-induced degradation of efficiency. It is found that 5% excess lead is best for devices regarding the performance and stability and devices retained greater than 50% of the initial efficiency after 2 h of prolonged irradiation. We attribute this phenomenon to the formation of PbI2 which induces passivation in the grain-boundaries.
- Type
- Research Letters
- Information
- Copyright
- Copyright © Materials Research Society 2018
References
- 2
- Cited by