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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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概括

研究人员为有机太阳能电池 (OSC) 开发了新的锡洛终结侧链. 这些链条既提高了功率转换效率 (PCE),也提高了灵活电子产品的伸展性.

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所有聚合物太阳能电池都是聚合物.机械上强大 机械上强大聚合小分子受体的受体.素终结侧链的侧链是由素终结的可伸缩的有机太阳能电池

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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
  • 聚合物化学 聚合物化学

背景情况:

  • 灵活和可拉伸的有机太阳能电池 (OSC) 对可穿戴电子产品至关重要.
  • 在OSC中同时实现高功率转换效率 (PCE) 和出色的伸展性仍然是一个挑战.
  • 目前的高性能OSC经常使用聚合物捐赠者 (PD) 和小分子受体 (SMA).

研究的目的:

  • 合成和评估一种新型的聚合小分子受体 (P-SMA) 具有西洛终结侧链 (PY-SiO).
  • 为了比较PY-SiO的光伏和机械性能与以乙基基终结侧链 (PY-EH) 的参考P-SMA.
  • 调查素终结侧链在高性能,可拉伸的OSC中的潜力.

主要方法:

  • 合成PY-SiO和PY-EH聚合小分子受体.
  • 使用PBDB-T作为聚合物供体制造全聚合物太阳能电池 (全PSC).
  • 光伏性能 (PCE) 和机械性能 (裂纹发生应变) 的表征.
  • 在机械应变下对设备性能的评估.

主要成果:

  • PY-SiO的结合优化了膜形态,增强了分子聚合和电荷传输.
  • 所有基于PBDB-T/PY-SiO的PSC都获得了较高的PCE (12.04%) 与PBDB-T/PY-EH (10.85%) 相比.
  • 用西洛终结的侧链改善了薄膜裂纹开始的应变 (PY-SiO为18.32%,PY-EH为11.15%).
  • 在20%的应变下,可伸缩的全PSC与PY-SiO保持>70%PCE,优于基于PY-EH的设备.

结论:

  • 在OSC中,以西洛终结的侧链有效地同时增强PCE和伸展性.
  • 优化的分子聚合和膜形态学有助于提高设备性能.
  • PY-SiO代表了开发下一代高性能,可拉伸的有机电子产品的一个有希望的材料.