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Synergistic effect of caprolactam as lewis base and interface engineering for efficient and stable planar perovskite solar cells
- Source :
- Nano Energy. 42:222-231
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Low-cost caprolactam (CPL) has been introduced into one-step anti-solvent process to fabricate efficient and stable planar perovskite solar cells (PSCs) for the first time. It is found that CPL as a Lewis base has the weak coordination ability to Pb(II), and this weak interaction will be easily broken by either anti-solvent dripping or annealing owing to the steric effect, thus leading to a compact film with monolithic grains. Up to 19.2% power conversion efficiency (PCE) has been achieved. Especially, the PSCs exhibit superior stability in ambient condition, which PCE can be retained 95% of its initial PCE after 1200 h. Further investigation suggests that the residual CPL in the perovskite film can well passivate perovskite grain boundaries and the interface by its interaction with Pb2+ cations, thus leading to good anti-moisture and thermal stabilities of perovskite films. This work provides a new way to fabricate highly efficient, stable PSCs by adopting an appropriate Lewis base simultaneously for high quality perovskite films and passivation toward grain boundaries and interfaces.
- Subjects :
- Materials science
Passivation
Renewable Energy, Sustainability and the Environment
Annealing (metallurgy)
Inorganic chemistry
Energy conversion efficiency
Caprolactam
02 engineering and technology
Crystal structure
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
chemistry
Chemical engineering
General Materials Science
Grain boundary
Lewis acids and bases
Electrical and Electronic Engineering
0210 nano-technology
Perovskite (structure)
Subjects
Details
- ISSN :
- 22112855
- Volume :
- 42
- Database :
- OpenAIRE
- Journal :
- Nano Energy
- Accession number :
- edsair.doi...........2ad7b108f503d53a386735fc1818b20c