Understanding the langmuir and Langmuir-Schaefer film conformation of low-bandgap polymers and their bulk heterojunctions with PCBM
| Autor: | Christian Njel, Roger C. Hiorns, Edilene Assunção Da Silva, Carlos J. L. Constantino, Clarissa de Almeida Olivati, Rémi Dedryvère, Christine Lartigau-Dagron, José Diego Fernandes, Alberto Gregori |
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| Přispěvatelé: | Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Universidade Estadual Paulista (Unesp), Universite de Pau et des Pays de l'Adour, Istituto Italiano di Tecnologia, Karlsruhe Institute of Technology (KIT) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Absorption spectroscopy Organic solar cell Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Polymer solar cell Supramolecular assembly X-ray photoelectron spectroscopy [CHIM.ANAL]Chemical Sciences/Analytical chemistry Monolayer Side chain General Materials Science Electrical and Electronic Engineering chemistry.chemical_classification Mechanical Engineering bulk heterojunction structure-property relations General Chemistry Polymer [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences langmuir-schaefer [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry monolayers [CHIM.POLY]Chemical Sciences/Polymers chemistry Chemical engineering Mechanics of Materials low-bandgap polymers 0210 nano-technology |
| Zdroj: | Nanotechnology Nanotechnology, Institute of Physics, 2020, 31 (31), pp.315712. ⟨10.1088/1361-6528/ab8b0b⟩ Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0957-4484 1361-6528 |
| DOI: | 10.1088/1361-6528/ab8b0b⟩ |
| Popis: | Made available in DSpace on 2020-12-12T02:41:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-07-31 Low-bandgap polymers are widely used as p-type components in photoactive layers of organic solar cells, due to their ability to capture a large portion of the solar spectrum. The comprehension of their supramolecular assembly is crucial in achieving high-performance organic electronic devices. Here we synthezed two exemplar low-bandgap cyclopentadithiophene (CPDT):diketopyrrolopyrrole (DPP)-based polymers, with either a twelve carbon (C12) or a tri etyleneglycol (TEG) side chains on the DPP units (respectively denoted PCPDTDPP_C12 and PCPDTDPP_TEG). We deposited Langmuir-Schaefer films of these polymers blended with the widely used electron donor material [6,6]-phenyl-C61-butyric-acid methyl ester (PCBM). We then characterized the conformational, optical and morphological properties of these films. From the monolayers to the solid films, we observed distinct self-organization and surface properties for each polymer due to the distinct nature of their side chains. Emphasizing their attraction interactions with PCBM and the phase transitions according to the surface pressure. The elements amount on the surface, calculated through the XPS, gave us a good insight on the polymers' conformations. Through UV-visible absorption spectroscopy, the improvement in the PCPDTDPP film ordering upon PCBM addition is evident and we saw the contribution of the polymer units on the optical response. Chemical attributions of the polymers were assigned using FTIR Spectroscopy and Raman Scattering, revealing the physical interaction after mixing the materials. We showed that it is possible to build nanostructured PCPDTDPPs films with a high control of their molecular properties through an understanding of their self-assembly and interactions with an n-type material. Departamento de Física Faculdade de Ci ncias e Tecnologia UNESP, Rua Roberto Simonsen 305 E2S UPPA CNRS IPREM Universite de Pau et des Pays de l'Adour Center for Sustainable Future Technologies Istituto Italiano di Tecnologia, via Livorno 60 Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1 Departamento de Física Faculdade de Ci ncias e Tecnologia UNESP, Rua Roberto Simonsen 305 |
| Databáze: | OpenAIRE |
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