侧链和水化在n型聚合物薄膜中混合电荷传输中的作用
Jokūbas Surgailis1, Lucas Q Flagg2, Lee J Richter2
1King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division, Organic Bioelectronics Lab, Thuwal, 23955-6900, Saudi Arabia.
Advanced materials (Deerfield Beach, Fla.)
|March 30, 2024
概括
研究人员研究了胀如何影响有机混合离子电子导体 (OMIECs). 他们发现高含水量,而不是膨胀本身,阻碍了n型OMIEC中的电荷运输,强调对设备性能进行水吸收控制.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 电化学 电化学 电化学
背景情况:
- 乙烯糖醇 (EG) 侧链在有机混合离子电子导体 (OMIEC) 中很常见.
- 薄膜膨胀对OMIEC电荷传输的影响,特别是对于n型材料,仍然未得到充分研究.
研究的目的:
- 调查分支EG侧链的不同长度如何影响n型OMIEC的混合电荷传输特性.
- 了解薄膜膨胀和吸水在这些材料性能中的作用.
主要方法:
- 合成的n型OMIECs具有纳夫他林-1,4,5,8-四碳酸-二胺-比提奥芬骨干和多种分支EG侧链长度.
- 利用原子力显微镜 (AFM),放牧发生率广角X射线散射 (GIWAXS) 和扫描道显微镜 (STM) 进行干膜特征.
- 使用电化学石英晶体微平衡与散射监测 (EQCM-D) 和现场GIWAXS来研究电化学兴奋剂期间的膜胀和微观结构变化.
主要成果:
- 具有共同脊柱的干膜显示出类似的结构,无论EG侧链的长度如何.
- 电化学兴奋剂诱导了膜胀和微观结构的显著变化,这取决于侧链的长度.
- 尽管晶石含量减少了,但片仍然保持了电荷传输,但高含水量损害了电子互连.
结论:
- 薄膜膨胀对n型OMIEC电荷运输的影响主要与水含量有关,而不仅仅是物理膨胀.
- 控制OMIEC膜中的水吸收对于优化电化学设备中的电荷传输和性能至关重要.
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