通过通过结操纵缺电子聚合物的共平面脊柱形状,显著改善单极n型晶体管的性能
Yang Wang1, Tsukasa Hasegawa1, Hidetoshi Matsumoto1
1Department of Materials Science and Engineering , Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552 , Japan.
Journal of the American Chemical Society
|February 1, 2019
概括
高性能n型半导体聚合物对于有机电子非常重要. 这项研究报告了具有高达7.16cm2Vs-1的电子流动性的新聚合物,通过优化骨干构成和结合实现了这一目标.
科学领域:
- 材料科学
- 有机电子
- 聚合物化学
背景情况:
- 开发高性能单极n型半导体聚合物是有机电子领域的一个重大挑战.
- 现有的材料往往难以实现高电子流动性,限制了它们的应用.
- 单极电子流动性 (μe) 超过5厘米Vs-1是罕见的.
研究的目的:
- 开发具有增强单极电子流动性的新型聚乙二甲衍生物.
- 研究骨干构成和结对电荷传输特性的影响.
- 为改善半导体聚合物的电子移动性制定总体策略.
主要方法:
- 合成新的聚乙二甲衍生物,其中包括乙烯桥梁.
- 密度函数理论 (DFT) 的计算用于预测和分析骨干结构和π系统平面性.
- 用于测量电子移动性的薄膜晶体管 (TFT) 的制造和表征.
- 同步射线散射 (GIWAXS) 和原子力显微镜 (AFM) 用于研究薄膜结晶性和分子包装.
主要成果:
- 在TFT中实现高单极电子流动性 (μe) 高达7.16cm2 V-1 s-1.
- 乙烯桥诱导了分子内键,促进了更平坦的脊柱形状.
- 增强的平面性导致改善薄膜结晶性和分子包装,由GIWAXS和AFM证明.
- GIWAXS 显示了一个非常短的 π-π 堆叠距离为 3.40 Å.
结论:
- 这项研究在单极n型半导体聚合物方面取得了重大进展.
- 通过结合优化脊柱共平面性是提高电子流动性的有效策略.
- 这些发现为设计高性能有机电子材料提供了有希望的方法.
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