表面极性和自我结构的纳米槽协同定向的分子包装,以实现高晶度的高效电荷传输
Deyang Ji1,2, Xiaomin Xu1,3, Longfeng Jiang1
1Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
Journal of the American Chemical Society
|January 28, 2017
概括
聚胺 (PAA) 介电层使高晶度有机半导体薄膜能够有效地传输电荷. 这种方法在有机薄膜晶体管中实现了高流动性,证明了广泛的适用性.
科学领域:
- 材料科学
- 有机电子
- 半导体物理
背景情况:
- 在有机半导体中有效的电荷传输对于高性能光电子设备至关重要.
- 开发新的介电材料是控制有机半导体膜生长和设备性能的关键.
研究的目的:
- 证明使用聚胺酸 (PAA) 作为调整有机半导体薄膜生长的介电层.
- 研究PAA对有机半导体晶体性,电荷传输和薄膜晶体管 (TFT) 性能的影响.
主要方法:
- 使用的聚胺酸 (PAA) 作为一种容易沉积的,无回火的介电层.
- 作为模型有机半导体,用于研究薄膜生长和器件特性.
- 描述PAA表面结构及其对五烯分子方向的影响.
- 使用PAA和聚胺 (PI) 介电材料制造和测试有机薄膜晶体管 (OTFT).
主要成果:
- PAA介电器促进了大面积,高晶薄膜的生长,其移动性高达30.6 cm2/V·s.
- PAA的自我波纹表面和极性群体诱导了五分子的垂直方向.
- 与聚胺 (PI) 相比,PAA增强了薄膜结晶性,增加了域大小,并减少了接口陷密度.
- 证明了PAA介电概念与其他有机半导体如DPA,四,CuPc和F16CuPc的一般适用性.
结论:
- 聚氨酸 (PAA) 介电层有效控制有机半导体形态,以增强电荷传输.
- 在介电材料中结合表面纳米结构和强极性是高性能有机电子的可行策略.
- 这种方法为改善各种有机半导体系统的晶体性和移动性提供了一种一般方法.
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