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相关概念视频

Electron Affinity03:07

Electron Affinity

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The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
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Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

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Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
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High Precision FRET at Single-molecule Level for Biomolecule Structure Determination
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高性能非融合电子接收器,具有精确控制的侧链化.

Kexin Yu1,2, Tao Zhou3, Wenting Liang1

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.

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|September 14, 2023
PubMed
概括

有机太阳能电池中非富勒烯受体的化提高了分子包装和效率. 在DTCBT-F5中优化的侧链化实现了12.7%的功率转换效率,证明了对高性能设备的有希望的战略.

关键词:
化是指化.混杂性 混杂性 混杂性分子排序的分子排序.非化电子接受器的电子接受器有机太阳能电池是有机太阳能电池.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 有机电子 有机电子
  • 太阳能光伏发电是如何实现的

背景情况:

  • 非富勒烯受体 (NFAs) 对于高效的有机太阳能电池 (OSC) 是至关重要的.
  • NFA的分子包装和侧链工程显著影响设备性能.
  • 化是调整NFAs电子和形态特性的一个关键策略.

研究的目的:

  • 设计和合成新型非融合电子受体 (DTCBT-Fx,x=0,5,9) 与受控侧链化.
  • 系统地研究不同含量对分子包装,能量水平和膜形态学的影响.
  • 优化NFA结构,以改善电荷传输和减少OSC中的重组.

主要方法:

  • 三个不同化度的非化电子受体的合成.
  • 光物理性质,能量水平和分子排序的表征.
  • 使用与PM6供体聚合物合成的NFAs制造和测试有机太阳能电池.
  • 对薄膜形态和电荷载体动态的分析.

主要成果:

  • 侧链化有效调整了光吸收,能量水平,分子排序和膜形态.
  • DTCBT-F5与PM6供体表现出最佳的混合性,导致电荷重组减少.
  • 在基于DTCBT-F5的设备中观察到更好的电荷载体移动性.
  • 基于DTCBT-F5的OSC实现了12.7%的功率转换效率,超过了控制器 (11.4%和11.6%).

结论:

  • 在非融合电子接受器中精确控制侧链化是提高OSC性能的可行策略.
  • 优化化可以提高材料性能和设备效率.
  • 这项研究为下一代NFA的合理设计提供了宝贵的见解,用于高效的有机太阳能电池.