聚合物场效应晶体管在设计上具有超高的移动性
Hoi Nok Tsao1, Don M Cho, Insun Park
1Max Planck Institute for Polymer Research, Mainz, Germany.
Journal of the American Chemical Society
|February 5, 2011
概括
供体-接受体共聚合物的高分子量显著提高了场效应晶体管 (FET) 中的孔移动性. 这项研究探讨了用于具有超高电荷载体性能的先进有机半导体的聚合物设计.
科学领域:
- 有机电子学有机电子学
- 材料科学是一种材料科学.
- 半导体物理 半导体物理
背景情况:
- 捐赠者-受体共聚物对有机电子学至关重要.
- 优化聚合物设计是实现场效应晶体管 (FET) 高电荷载体移动性的关键.
- 了解结构属性关系对于开发先进的有机半导体至关重要.
研究的目的:
- 为了研究分子量,基替代剂和供体-接受体相互作用对循环二甲-二甲 (CDT-BTZ) 共聚物的性能的影响.
- 为了将聚合物设计参数与薄膜形态,结晶性和电荷传输特性相关联.
- 建立具有超高孔移动性的有机半导体的设计原则.
主要方法:
- 合成和表征具有不同分子重量的CDT-BTZ共聚物.
- 场效应晶体管 (FET) 的制造和电气特性.
- 使用像X射线衍射这样的技术分析薄膜形态和结晶性.
- 固态核磁共振 (NMR) 光谱检测分子间相互作用.
主要成果:
- 基于CDT-BTZ的FET中的孔移动性达到了3.3cm(2) V(-1) s(-1),严重取决于分子量.
- 增加的分子量导致了更好的结晶性,而在薄膜形态上没有显著的变化.
- 捐赠者-受体相互作用和基替代物被确定为影响分子间堆叠和电荷传输的关键因素.
结论:
- 分子重量是实现CDT-BTZ共聚物中超高孔移动性的主要决定因素.
- 由于分子重量更高,增强的结晶性对于改善电荷传输至关重要.
- 这些发现为未来的有机半导体提供了宝贵的聚合物设计指南,目标移动性超过3厘米.
相关概念视频
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