Thermal stability of poly[2-methoxy-5-(2’-phenylethoxy)-1,4-phenylene vinylene] (MPEPPV):fullerene bulk heterojunction solar cells
| Autor: | Bst Bert Conings, D. Vanderzande, Joke Vandenbergh, S Serkan Esiner, Sabine Bertho, G. Van Assche, Jean Manca, Wouter Maes, Raj René Janssen, MM Martijn Wienk, Jun Zhao, Donato Spoltore, Jurgen Kesters, Laurence Lutsen, B. Van Mele |
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| Přispěvatelé: | Macromolecular and Organic Chemistry, Molecular Materials and Nanosystems |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Fullerene Materials science Polymers and Plastics Organic solar cell Organic Chemistry Hybrid solar cell Polymer Polymer solar cell Inorganic Chemistry Chemical engineering chemistry Materials Chemistry Thermal stability SDG 7 - Affordable and Clean Energy SDG 7 – Betaalbare en schone energie |
| Zdroj: | Macromolecules, 44(21), 8470-8478. American Chemical Society BASE-Bielefeld Academic Search Engine |
| ISSN: | 1520-5835 0024-9297 |
| Popis: | To improve the thermal stability of polymer:fullerene bulk heterojunction solar cells, a new polymer, poly[2-methoxy-5-(2'-phenylethoxy)-1,4-phenylenevinylene] (MPE-PPV), has been designed and synthesized, which showed an increased glass transition temperature (Tg) of 111 °C. The thermal characteristics and phase behavior of MPE-PPV:[6,6]-phenyl C61-butyric acid methyl ester ([60]PCBM) blends were investigated by means of modulated temperature differential scanning calorimetry and rapid heating–cooling calorimetry. The thermal stability of MPE-PPV:[60]PCBM solar cells was compared with devices based on the reference MDMO-PPV material with a Tg of 45 °C. Monitoring of the photocurrent–voltage characteristics at elevated temperatures revealed that the use of high-Tg MPE-PPV resulted in a substantial improvement of the thermal stability of the solar cells. Furthermore, a systematic transmission electron microscope study of the active polymer:fullerene layer at elevated temperatures likewise demonstrated a more stable morphology for the MPE-PPV:[60]PCBM blend. Both observations indicate that the use of high-Tg MPE-PPV as donor material leads to a reduced free movement of the fullerene molecules within the active layer of the photovoltaic device. Finally, optimization of the PPV:fullerene solar cells revealed that for both types of devices the use of [6,6]-phenyl C71-butyric acid methyl ester ([70]PCBM) resulted in a substantial increase of current density and power conversion efficiency, up to 3.0% for MDMO-PPV:[70]PCBM and 2.3% for MPE-PPV:[70]PCBM. |
| Databáze: | OpenAIRE |
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