分析平台 用于利用远程场效应晶体管对剂溶液度,薄膜和接口中的电荷载体密度以及聚合物的物理扩散进行表征
Hyun-June Jang1, Justine Wagner1, Hui Li1
1Department of Materials Science and Engineering , Johns Hopkins University , 3400 N. Charles Street , Baltimore , Maryland 21218 , United States.
Journal of the American Chemical Society
|March 1, 2019
概括
一个新的远程门场效应晶体管 (RG FET) 系统描述了导电聚合物中的注和被动聚合物中的扩散. RG FET检测电位变化,揭示了表面的电子捐赠者-接受者相互作用.
科学领域:
- 材料科学
- 有机电子
- 表面科学
背景情况:
- 导电聚合物和被动聚合物在电子设备中至关重要.
- 了解兴奋剂效应和分子扩散是优化聚合物的关键.
- 现有的表征方法可能范围有限或需要特定的条件.
研究的目的:
- 开发和使用一个远程门场效应晶体管 (RG FET) 系统来描述导电聚合物中的合物.
- 在被动聚合物矩阵中研究小分子的物理扩散.
- 在材料表面非破坏性地分析电子捐赠者-接受者的相互作用.
主要方法:
- 远程门场效应晶体管 (RG FET) 检测系统的制造.
- 在用F4TCNQ进行注时测量聚合物薄膜 (例如P3HT) 的电极干扰.
- 应用Vth转移模型来量化聚合物导电性和移动性的变化.
- 通过FET分析监测聚烯中的小分子扩散 (例如F4TCNQ).
主要成果:
- 用F4TCNQ诱导的正电位和降低的FET值电压 (Vth) 进行多化.
- 在不同的电子捐赠者 (P3HT,ITO,黄金) 中观察到类似的电电位扰动,这表明剂结合的电活性点有限.
- RG FET系统成功监测了聚乙烯中的F4TCNQ扩散,由度梯度驱动.
- 对各种电子受体观察到Vth转移的差异,归因于它们的尺寸和还原潜力.
结论:
- RG FET 系统提供了一种多功能工具,用于描述聚合物中的注和扩散.
- 表面相互作用和剂度显著影响导电聚合物的电特性.
- 这项技术可以对聚合物中的表面相互作用和分子运输进行非破坏性环境分析.
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