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Poly[(3-hexylthiophene)-block-(3-semifluoroalkylthiophene)] for polymer solar cells.

Yamada I, Takagi K, Hayashi Y, Soga T, Shibata N, Toru T - Int J Mol Sci (2010)

Bottom Line: Although the composition ratio of P3SFT in P(3HT-b-3SFT) was low, the influence of P3SFT on the morphology and properties of solar cells was significant.The annealing process for the BHJ solar cells induced the formation of large domains and led to poor solar cell performance.The BHJ solar cells, based on PCBM and P(3HT-b-3SFT), prepared by the non-annealing process, had a maximum power conversion efficiency of 0.84% under 100 mW/cm(2) (AM 1.5 solar illumination) in air.

View Article: PubMed Central - PubMed

Affiliation: Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan; E-Mails: jade1cat@yahoo.co.jp (I.Y.); soga@nitech.ac.jp (T.S.); nozshiba@nitech.ac.jp (N.S.).

ABSTRACT
We report the synthesis of poly[(3-hexylthiophene)-block-(3-(4,4,5,5,6,6,7,7,7-nonafluoroheptyl)thiophene)], P(3HT-b-3SFT), carried out by the Grignard Metathesis Method (GRIM). The copolymers composition was determined by (1)H and (19)F NMR spectroscopies, and gel permeation chromatography (GPC). The thin films of P(3HT-b-3SFT) were investigated by ultraviolet-visible absorption spectroscopy and atomic force microscopy (AFM). We also fabricated bulk-hetero junction (BHJ) solar cells based on blends of P(3HT-b-3SFT) and [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM). Although the composition ratio of P3SFT in P(3HT-b-3SFT) was low, the influence of P3SFT on the morphology and properties of solar cells was significant. The annealing process for the BHJ solar cells induced the formation of large domains and led to poor solar cell performance. The BHJ solar cells, based on PCBM and P(3HT-b-3SFT), prepared by the non-annealing process, had a maximum power conversion efficiency of 0.84% under 100 mW/cm(2) (AM 1.5 solar illumination) in air.

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AFM phase images of the solar cells with PCBM:P(3HT-b-3SFT). (a) non-annealed; (b) 100 °C; (c) 140 °C (image size: 1 μm × 1 μm).
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f8-ijms-11-05027: AFM phase images of the solar cells with PCBM:P(3HT-b-3SFT). (a) non-annealed; (b) 100 °C; (c) 140 °C (image size: 1 μm × 1 μm).

Mentions: Figure 8 shows the AFM images of morphology for solar cells with P(3HT-b-3SFT)/PCBM prepared under various annealing conditions. The AFM images of the solar cells annealed at 100 °C and 140 °C showed round shape domains, and domains of the device annealed at 140 °C are larger than at 100 °C. Since these domains disturb formation of the bicontinuous network in the BHJ solar cells, the self assembly of P(3HT-b-3SFT) decrease solar cells properties by annealing.


Poly[(3-hexylthiophene)-block-(3-semifluoroalkylthiophene)] for polymer solar cells.

Yamada I, Takagi K, Hayashi Y, Soga T, Shibata N, Toru T - Int J Mol Sci (2010)

AFM phase images of the solar cells with PCBM:P(3HT-b-3SFT). (a) non-annealed; (b) 100 °C; (c) 140 °C (image size: 1 μm × 1 μm).
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3100822&req=5

f8-ijms-11-05027: AFM phase images of the solar cells with PCBM:P(3HT-b-3SFT). (a) non-annealed; (b) 100 °C; (c) 140 °C (image size: 1 μm × 1 μm).
Mentions: Figure 8 shows the AFM images of morphology for solar cells with P(3HT-b-3SFT)/PCBM prepared under various annealing conditions. The AFM images of the solar cells annealed at 100 °C and 140 °C showed round shape domains, and domains of the device annealed at 140 °C are larger than at 100 °C. Since these domains disturb formation of the bicontinuous network in the BHJ solar cells, the self assembly of P(3HT-b-3SFT) decrease solar cells properties by annealing.

Bottom Line: Although the composition ratio of P3SFT in P(3HT-b-3SFT) was low, the influence of P3SFT on the morphology and properties of solar cells was significant.The annealing process for the BHJ solar cells induced the formation of large domains and led to poor solar cell performance.The BHJ solar cells, based on PCBM and P(3HT-b-3SFT), prepared by the non-annealing process, had a maximum power conversion efficiency of 0.84% under 100 mW/cm(2) (AM 1.5 solar illumination) in air.

View Article: PubMed Central - PubMed

Affiliation: Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan; E-Mails: jade1cat@yahoo.co.jp (I.Y.); soga@nitech.ac.jp (T.S.); nozshiba@nitech.ac.jp (N.S.).

ABSTRACT
We report the synthesis of poly[(3-hexylthiophene)-block-(3-(4,4,5,5,6,6,7,7,7-nonafluoroheptyl)thiophene)], P(3HT-b-3SFT), carried out by the Grignard Metathesis Method (GRIM). The copolymers composition was determined by (1)H and (19)F NMR spectroscopies, and gel permeation chromatography (GPC). The thin films of P(3HT-b-3SFT) were investigated by ultraviolet-visible absorption spectroscopy and atomic force microscopy (AFM). We also fabricated bulk-hetero junction (BHJ) solar cells based on blends of P(3HT-b-3SFT) and [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM). Although the composition ratio of P3SFT in P(3HT-b-3SFT) was low, the influence of P3SFT on the morphology and properties of solar cells was significant. The annealing process for the BHJ solar cells induced the formation of large domains and led to poor solar cell performance. The BHJ solar cells, based on PCBM and P(3HT-b-3SFT), prepared by the non-annealing process, had a maximum power conversion efficiency of 0.84% under 100 mW/cm(2) (AM 1.5 solar illumination) in air.

Show MeSH