Dipolar self-assembled monolayers grafted on ZnO for the tuning of electronic properties of the poly (3-hexylthiophène)- [6,6]-phenyl C61-butyric acid methylester blend
| Autor: | Mahamadou Seydou, Philippe Lang, F. Kouki, Mariem Ben Youssef |
|---|---|
| Přispěvatelé: | Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS (UMR_7086)), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Metals and Alloys Self-assembled monolayer 02 engineering and technology Surfaces and Interfaces [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 7. Clean energy Polymer solar cell Surface energy Surfaces Coatings and Films Electronic Optical and Magnetic Materials Active layer Chemical engineering 0103 physical sciences Monolayer Materials Chemistry Moiety Work function 0210 nano-technology |
| Zdroj: | Thin Solid Films Thin Solid Films, Elsevier, 2020, 714, pp.138296. ⟨10.1016/j.tsf.2020.138296⟩ |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2020.138296⟩ |
| Popis: | International audience; A promising solution to improve the performance of Bulk heterojunction organic photovoltaic devices is the insertion of functionalized self-assembled monolayers (SAMs) at the interface between the Electron Transporting Layer (ETL) and the active layer. By grafting such dipolar SAMs based on Y-PP-COOH (P = Phenyl, Y = CH3O, F)) on a ZnO ETL, both the electronic and the chemical properties of the interface are modified. The growth of the active blend the poly(3-hexylthiophène)-[6,6]-phenyl C61-butyric acid methylester blend deposited onto the SAMs is also altered. The dipole with a component oriented perpendicularly to the ZnO surface modifies the ZnO work function whereas the surface energy of the SAM influences the microstructuration of the active material. When we analyze the inverted photovoltaic cell, we find that the two effects may be distinguished: the CH3O moiety favorably affects the electrical transfer of carriers with mainly an improvement of the open-circuit voltage Voc whereas fluorine disfavors both electron extraction and blend microstructure quality, with a lower Voc and electrical current density Jsc. 2 |
| Databáze: | OpenAIRE |
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