Aqueous Nanoparticle Polymer Solar Cells: Effects of Surfactant Concentration and Processing on Device Performance
| Autor: | Raj René Janssen, Fallon J. M. Colberts, MM Martijn Wienk |
|---|---|
| Přispěvatelé: | Molecular Materials and Nanosystems, Macromolecular and Organic Chemistry |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
miniemulsion nanoparticle dispersion surfactant Nanoparticle Nanotechnology 02 engineering and technology ζ-potential 010402 general chemistry 01 natural sciences Polymer solar cell Pulmonary surfactant Phase (matter) General Materials Science Dewetting Aqueous solution semiconducting polymer fullerene 021001 nanoscience & nanotechnology Acceptor 0104 chemical sciences Chemical engineering conductivity organic photovoltaics 0210 nano-technology Dispersion (chemistry) Research Article |
| Zdroj: | ACS Applied Materials & Interfaces, 9(15), 13380-13389. American Chemical Society ACS Applied Materials & Interfaces, 9, 13380-13389 ACS Applied Materials & Interfaces |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b00557 |
| Popis: | Polymer solar cells based on PDPP5T and PCBM as donor and acceptor materials, respectively, were processed from aqueous nanoparticle dispersions. Careful monitoring and optimization of the concentration of free and surface-bound surfactants in the dispersion, by measuring the conductivity and ζ-potential, is essential to avoid aggregation of nanoparticles at low concentration and dewetting of the film at high concentration. The surfactant concentration is crucial for creating reproducible processing conditions that aid in further developing aqueous nanoparticle processed solar cells. In addition, the effects of adding ethanol, of aging the dispersion, and of replacing [60]PCBM with [70]PCBM to enhance light absorption were studied. The highest power conversion efficiencies (PCEs) obtained are 2.0% for [60]PCBM and 2.4% for [70]PCBM-based devices. These PCEs are limited by bimolecular recombination of photogenerated charges. Cryo-TEM reveals that the two components phase separate in the nanoparticles, forming a PCBM-rich core and a PDPP5T-rich shell and causing a nonoptimal film morphology. |
| Databáze: | OpenAIRE |
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