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Perovskite Films with Reduced Interfacial Strains via a Molecular-Level Flexible Interlayer for Photovoltaic Application
- Source :
- Advanced materials (Deerfield Beach, Fla.). 32(38)
- Publication Year :
- 2020
-
Abstract
- Interface strains and lattice distortion are inevitable issues during perovskite crystallization. Silane as a coupling agent is a popular connector to enhance the compatibility between inorganic and organic materials in semiconductor devices. Herein, a protonated amine silane coupling agent (PASCA-Br) interlayer between TiO2 and perovskite layers is adopted to directionally grasp both of them by forming the structural component of a lattice unit. The pillowy alkyl ammonium bromide terminals at the upper side of the interlayer provide well-matched growth sites for the perovskite, leading to mitigated interface strain and ensuing lattice distortion; meanwhile, its superior chemical compatibility presents an ideal effect on healing the under-coordinated Pb atoms and halogen vacancies of bare perovskite crystals. The PASCA-Br interlayer also serves as a mechanical buffer layer, inducing less cracked perovskite film when bending. The developed molecular-level flexible interlayer provides a promising interfacial engineering for perovskite solar cells and their flexible application.
- Subjects :
- chemistry.chemical_classification
Ammonium bromide
Materials science
Mechanical Engineering
Compatibility (geochemistry)
02 engineering and technology
Semiconductor device
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Silane
0104 chemical sciences
law.invention
chemistry.chemical_compound
chemistry
Chemical engineering
Mechanics of Materials
law
Lattice (order)
Halogen
General Materials Science
Crystallization
0210 nano-technology
Alkyl
Subjects
Details
- ISSN :
- 15214095
- Volume :
- 32
- Issue :
- 38
- Database :
- OpenAIRE
- Journal :
- Advanced materials (Deerfield Beach, Fla.)
- Accession number :
- edsair.doi.dedup.....ae8fc4034e769b878204d085cf9abe06