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Molecular Intercalation and Cohesion of Organic Bulk Heterojunction Photovoltaic Devices

机译：有机体异质结光伏器件的分子嵌入和内聚力

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摘要

The phase separated bulk heterojunction (BHJ) layer in BHJ polymenfullerene organic photovoltaic devices (OPV) are mechanically weak with low values of cohesion. Improved cohesion is important for OPV device thermome-chanical reliability. BHJ devices are investigated and how fullerene intercalation within the active layer affects cohesive properties in the BHJ is shown.The intercalation of fullerenes between the side chains of the polymers poly(3,3'''-didocecyl quaterthiophene) (PQT-12) and poly(2,5-bis(3-hexade-cylthiophen-2-yl)thieno[3,2-b]thiophene (pBTTT) is shown to enhance BHJ layer cohesion. Cohesion values range from ≈1 to 5 J m~2, depending on the polymer:fullerene blend, processing conditions, and composition. Devices with non-intercalated BHj layers are found to have significantly reduced values of cohesion. The resulting device power conversion efficiencies (PCE) are also investigated and correlated with the device cohesion.
机译：BHJ聚富勒烯有机光伏器件（OPV）中的相分离体异质结（BHJ）层在机械上较弱，内聚力值低。改进的内聚性对于OPV器件的热机械可靠性非常重要。研究了BHJ器件，并展示了活性层中的富勒烯插层如何影响BHJ中的内聚性能。聚（3,3'''-二十二烷基四噻吩（PQT-12）和聚（2,5-双（3-己基噻吩-2-基）噻吩并[3,2-b]噻吩（pBTTT）可增强BHJ层的内聚力，内聚值的范围从≈1至5 J m〜2取决于聚合物：富勒烯的共混物，加工条件和组成，发现具有非插层BHj层的器件的内聚力值明显降低，还研究了所得器件的功率转换效率（PCE）并与器件的内聚力相关。

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  • 来源
    《Advanced Functional Materials》 |2013年第22期|2863-2871|共9页
  • 作者

    Christopher Bruner; Nichole C. Miller; Michael D. McGehee; Reinhold H. Dauskardt;

  • 作者单位

    Department of Materials Science and Engineering 496 Lomita Mall, Durand Building, Stanford, CA 94305-2205, USA;

    Department of Materials Science and Engineering 496 Lomita Mall, Durand Building, Stanford, CA 94305-2205, USA;

    Department of Materials Science and Engineering 496 Lomita Mall, Durand Building, Stanford, CA 94305-2205, USA;

    Department of Materials Science and Engineering 496 Lomita Mall, Durand Building, Stanford, CA 94305-2205, USA;

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