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首页> 外文期刊>Advanced energy materials >Investigation of Charge Carrier Behavior in High Performance Ternary Blend Polymer Solar Cells
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Investigation of Charge Carrier Behavior in High Performance Ternary Blend Polymer Solar Cells

机译：高性能三元共混聚合物太阳能电池充电载流子行为的研究

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摘要

This study demonstrates high-performance, ternary-blend polymer solar cells by modifying a binary blend bulk heterojunction (PPDT2FBT:PC71BM) with the addition of a ternary component, PPDT2CNBT. PPDT2CNBT is designed to have complementary absorption and deeper frontier energy levels compared to PPDT2FBT, while being based on the same polymeric backbone. A power conversion efficiency of 9.46% is achieved via improvements in both short-circuit current density (J(SC)) and open-circuit voltage (V-OC). Interestingly, the V-OC increases with increasing the PPDT2CNBT content in ternary blends. In-depth studies using ultraviolet photoelectron spectroscopy and transient absorption spectroscopy indicate that the two polymers are not electronically homogeneous and function as discrete light harvesting species. The structural similarity between PPDT2CNBT and PPDT2FBT allows the merits of a ternary system to be fully utilized to enhance both J(SC) and V-OC without detriment to fill-factor via minimized disruption of semi-crystalline morphology of binary PPDT2FBT: PC (71) BM blend. Further, by careful analysis, charge carrier transport in this ternary blend is clearly verified to follow parallel-like behavior.
机译：本研究通过加入三元组分PPDT2CNBT来调节二元混合物批量异质（PPDT2FBT：PC71BM）来证明高性能的三元共混聚合物太阳能电池。 PPDT2CNBT设计成与PPDT2FBT相比具有互补的吸收和更深的前沿能量水平，同时基于相同的聚合物骨架。通过短路电流密度（J（SC））和开路电压（V-OC）的改进来实现9.46％的电力转换效率。有趣的是，V-OC随着增加三元共混物中的PPDT2CNBT内容而增加。使用紫外线光电子能谱和瞬态吸收光谱的深入研究表明，两种聚合物不是电子均匀的并且用作离散光收集物种。 PPDT2CNBT和PPDT2FBT之间的结构相似度允许充分利用三元系统的优点来增强J（SC）和V-OC，而不会通过最小化二进制PPDT2FBT：PC的半晶形态的填充因子来增强填充因子：PC（71 BM混合。此外，通过仔细分析，清楚地验证了这种三元共混物中的电荷载流子以遵循平行的行为。

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  • 来源
    《Advanced energy materials》 |2016年第19期|1600637.1-1600637.9|共9页
  • 作者

    Lee Tack Ho; Uddin Mohammad Afsar; Zhong Chengmei; Ko Seo-Jin; Walker Bright; Kim Taehyo; Yoon Yung Jin; Park Song Yi; Heeger Alan J.; Woo Han Young; Kim Jin Young;

  • 作者单位

    UNIST Dept Energy Engn Ulsan 44919 South Korea;

    Korea Univ Dept Chem Seoul 136713 South Korea|Pusan Natl Univ Dept Cogno Mechatron Engn Miryang 627706 South Korea;

    Univ Calif Santa Barbara Ctr Polymers & Organ Solids Santa Barbara CA 93106 USA|South China Univ Technol Sch Chem & Chem Engn State Key Lab Luminescent Mat & Devices Guangzhou 510641 Guangdong Peoples R China;

    UNIST Dept Energy Engn Ulsan 44919 South Korea|Univ Calif Santa Barbara Ctr Polymers & Organ Solids Santa Barbara CA 93106 USA;

    UNIST Dept Energy Engn Ulsan 44919 South Korea;

    UNIST Dept Energy Engn Ulsan 44919 South Korea;

    UNIST Dept Energy Engn Ulsan 44919 South Korea;

    UNIST Dept Energy Engn Ulsan 44919 South Korea;

    Univ Calif Santa Barbara Ctr Polymers & Organ Solids Santa Barbara CA 93106 USA;

    Korea Univ Dept Chem Seoul 136713 South Korea;

    UNIST Dept Energy Engn Ulsan 44919 South Korea;

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