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Eleven-Membered Fused-Ring Low Band-Gap Polymer with Enhanced Charge Carrier Mobility and Photovoltaic Performance

机译:具有增强的电荷载流子迁移率和光伏性能的十一元熔融环低带隙聚合物

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摘要

A multi-ring, ladder-type low band-gap polymer (PIDTCPDT-DFBT) is developed to show enhanced light harvesting, charge transport, and photovoltaic performance. It possesses excellent planarity and enhanced effective conjugation length compared to the previously reported fused-ring polymers. In order to understand the effect of extended fused-ring on the electronic and optical properties of this polymer, a partially fused polymer PIDTT-T-DFBT is also synthesized for comparison. The fully rigidified polymer provides lower reorganizational energy, resulting in one order higher hole mobility than the reference polymer. The device made from PIDTCPDT-DFBT also shows a quite promising power conversion efficiency of 6.46%. Its short-circuit current (14.59 mA cm~(-2)) is also among the highest reported for ladder-type polymers. These results show that extending conjugation length in fused-ring ladder polymers is an effective way to reduce band-gap and improve charge transport for efficient photovoltaic devices.
机译:开发了多环梯型低带隙聚合物(PIDTCPDT-DFBT),以显示增强的光收集,电荷传输和光伏性能。与以前报道的稠环聚合物相比,它具有出色的平面度和增强的有效共轭长度。为了理解延伸的稠环对这种聚合物的电子和光学性能的影响,还合成了部分稠合的聚合物PIDTT-T-DFBT进行比较。完全硬化的聚合物提供较低的重组能,从而导致空穴迁移率比参考聚合物高一个数量级。由PIDTCPDT-DFBT制成的设备还显示出非常有希望的6.46%的功率转换效率。其短路电流(14.59 mA cm〜(-2))也是梯形聚合物报道的最高电流之一。这些结果表明,延长稠合环梯形聚合物中的共轭长度是减少带隙并改善有效光伏器件的电荷传输的有效方法。

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  • 来源
    《Advanced Functional Materials》 |2014年第23期|3631-3638|共8页
  • 作者单位

    Department of Materials Science and Engineering University of Washington Seattle, WA 98195, USA,Key Lab for Adv. Mater. Institute of Applied Chemistry East China University of Science and Technology 130 Mei Long Road, Shanghai 200237, China;

    Department of Materials Science and Engineering University of Washington Seattle, WA 98195, USA;

    Department of Materials Science and Engineering University of Washington Seattle, WA 98195, USA;

    Department of Chemistry University of Washington Box 351700, Seattle, WA 98195, USA;

    Department of Materials Science and Engineering University of Washington Seattle, WA 98195, USA;

    Department of Chemistry University of Washington Box 351700, Seattle, WA 98195, USA;

    Key Lab for Adv. Mater. Institute of Applied Chemistry East China University of Science and Technology 130 Mei Long Road, Shanghai 200237, China;

    Department of Materials Science and Engineering University of Washington Seattle, WA 98195, USA;

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