Journal
ADVANCED ENERGY MATERIALS
Volume 9, Issue 31, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201901642
Keywords
hysteresis; interface engineering; NiO; perovskite solar cells; stability
Categories
Funding
- National Natural Science Foundation of China [21750110442]
- Jardine Foundation
- Ministry of Education and Science of the Russian Federation [14.Y26.31.0027]
- German Federal Ministry for Economic Affairs and Energy within the research cluster Persist [0324037C]
- European Union Horizon 2020 research and innovation program [823717]
Ask authors/readers for more resources
In perovskite solar cells (PSCs), the interfaces are a weak link with respect to degradation. Electrochemical reactivity of the perovskite's halides has been reported for both molecular and polymeric hole selective layers (HSLs), and here it is shown that also NiO brings about this decomposition mechanism. Employing NiO as an HSL in p-i-n PSCs with power conversion efficiency (PCE) of 16.8%, noncapacitive hysteresis is found in the dark, which is attributable to the bias-induced degradation of perovskite/NiO interface. The possibility of electrochemically decoupling NiO from the perovskite via the introduction of a buffer layer is explored. Employing a hybrid magnesium-organic interlayer, the noncapacitive hysteresis is entirely suppressed and the device's electrical stability is improved. At the same time, the PCE is improved up to 18% thanks to reduced interfacial charge recombination, which enables more efficient hole collection resulting in higher V-oc and FF.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available