Vertical Phase Separation in Bilayer [6,6]-Phenyl-C61-butyric Acid Methyl Ester:Zinc Phthalocyanine Films
| Autor: | Qian Shao, Levan Tskipuri, Janice Reutt-Robey |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Organic solar cell Bilayer Nucleation Stacking 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Phenyl-C61-butyric acid methyl ester 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Crystallography chemistry.chemical_compound General Energy chemistry law Phase (matter) Molecule Physical and Theoretical Chemistry Scanning tunneling microscope 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 118:18612-18617 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp5059512 |
| Popis: | We report an ultrahigh vacuum scanning tunneling microscopy study of thermally driven interface rearrangement in binary films of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and zinc phthalocyanine (ZnPc), a model electron acceptor–electron donor system for organic solar cells. Neat PCBM films have been previously shown to undergo a transition from a disordered (glassy) phase to a crystalline hexagonal close-packed (hcp) arrangement above a critical packing density of 0.9 molecules/nm2. We now show how local PCBM density has a critical impact on binary film structure evolution. Bilayer films of PCBM and ZnPc undergo a spontaneous vertical phase separation to PCBM/ZnPc/Au(111) stacking at lower ( |
| Databáze: | OpenAIRE |
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