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Complementary Absorbing Star-Shaped Small Molecules for the Preparation of Ternary Cascade Energy Structures in Organic Photovoltaic Cells

机译:互补吸收星形小分子在有机光伏电池中制备三元级联能量结构的制备

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摘要

Two anthracene-based star-shaped conjugated small molecules, 5',5"-(9,10-bis((4-hexylphenyl)ethynyl)anthracene-2,6-diyl)bis(5-hexyl-2,2-bithiophene), HBantHBT, and 5',5"-(9,10-bis(phenylethynyl) anthracene-2,6-diyl)bis(5-hexyl-2,2'-bithiophene), BantHBT, are used as electron-cascade donor materials by incorporating them into organic photovoltaic cells prepared using a poly((5,5-E-alpha-((2-thienyl) methylene)-2-thiopheneacetonitrile)-alt-2,6-[(1,5-didecyloxy)naphtha-lene])) (PBTADN):[6,6]-phenyl-C71-butyric acid methyl ester (PC_(71)BM) blend. The small molecules penetrate the PBTADN:PC_(71)BM blend layer to yield complementary absorption spectra through appropriate energy level alignment and optimal domain sizes for charge carrier transfer. A high short-circuit current (J_(SC)) and fill factor (FF) are obtained using solar cells prepared with the ternary blend. The highest photovoltaic performance of the PBTADN:BantHBT:PC_(71)BM blend solar cells is characterized by a J_(SC) of 11.0 mA cm~(-2), an open circuit voltage (V_(OC)) of 0.91 V, a FF of 56.4%, and a power conversion efficiency (PCE) of 5.6% under AMI.5G illumination (with a high intensity of 100 mW~(-2)). The effects of the small molecules on the ternary blend are investigated by comparison with the traditional poly(3-hexylthi-ophene) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PC_(61)BM) system.
机译:两个蒽基星形共轭小分子,5',5“-(9,10-双((4-己基苯基)乙炔基)蒽-2,6-二基)双(5-己基-2,2-联噻吩) ),HBantHBT和5',5“-(9,10-双(苯基乙炔基)蒽-2,6-二基)双(5-己基-2,2'-联噻吩)BantHBT用作电子级联反应供体材料,通过将它们掺入使用聚((5,5-E-α-((2-噻吩基)亚甲基)-2-噻吩乙腈)-alt-2,6-[(1,5-二癸氧基)的有机光伏电池中)(石脑油-烯]))(PBTADN):[6,6]-苯基-C71-丁酸甲酯(PC_(71)BM)共混物。小分子穿过PBTADN:PC_(71)BM共混物层,通过适当的能级对准和电荷载流子转移的最佳畴尺寸,产生互补的吸收光谱。使用由三元共混物制备的太阳能电池可获得较高的短路电流(J_(SC))和填充系数(FF)。 PBTADN:BantHBT:PC_(71)BM混合太阳能电池的最高光伏性能的特征在于J_(SC)为11.0 mA cm〜(-2),开路电压(V_(OC))为0.91 V,在AMI.5G照明(高强度100 mW〜(-2))下,FF为56.4%,功率转换效率(PCE)为5.6%。通过与传统的聚(3-己基噻吩)(P3HT):[6,6]-苯基-C61-丁酸甲酯(PC_(61)BM)进行比较,研究了小分子对三元共混物的影响。系统。

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  • 来源
    《Advanced Functional Materials》 |2013年第12期|1556-1565|共10页
  • 作者单位

    Department of Chemical Engineering Pohang University of Science Technology Pohang, 790-784, South Korea;

    Department of Chemical Engineering Dong-A University Pusan, 604-714, South Korea;

    Department of Chemistry Research Institute for Natural Science Korea University Seoul, 136-701, South Korea;

    Department of Chemistry Gyeongsang National University Jinju, 660-701, South Korea;

    Department of Chemical Engineering Pohang University of Science Technology Pohang, 790-784, South Korea;

    Department of Chemical Engineering Pohang University of Science Technology Pohang, 790-784, South Korea;

    Department of Chemistry Research Institute for Natural Science Korea University Seoul, 136-701, South Korea;

    Department of Chemistry Gyeongsang National University Jinju, 660-701, South Korea;

    Department of Chemistry Research Institute for Natural Science Korea University Seoul, 136-701, South Korea;

    Department of Chemical Engineering Pohang University of Science Technology Pohang, 790-784, South Korea;

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