揭示基诱导陷状态对p和n通道有机场效应晶体管中电荷传输的影响,通过可变温度表征
Yurii Radiev1, Tobias Wollandt2, Hagen Klauk2
1Philipps-Universität Marburg, Renthof 7, 35032, Marburg, Germany.
Advanced materials (Deerfield Beach, Fla.)
|June 12, 2025
概括
门介电体上的基组产生陷状态,减少p和n通道的有机场效应晶体管 (OFET) 中的电荷载体流动性. 这一发现挑战了现有的信念,并突出了提高OFET绩效的关键因素.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 半导体物理 半导体物理
背景情况:
- 门介电-有机半导体 (OSC) 接口上的陷状态是有机场效应晶体管 (OFET) 中外部陷的主要来源.
- 它们的影响往往被错误地归因于暴露在空气中,而不是内在的接口特性.
- 了解这些陷对于提高OFET绩效至关重要.
研究的目的:
- 为了研究OFETs在门介电器-OSC接口的基诱导陷状态的作用.
- 为了描述在高真空条件下的电荷传输,隔离接口效应.
- 为了比较基化与无基门介电物的对p和n通道OFET的影响.
主要方法:
- 变温度转移长度方法 (TLM) 的表征.
- 利用高真空条件来消除环境因素.
- 与氧化 (Al2O3) 和无氧化,功能化的Al2O3门介电材料的设备进行比较.
主要成果:
- 基因诱导的陷状态显著降低了p和n通道OFET中的电荷载体移动性.
- 这种效应独立于通道类型,挑战了先前的假设.
- 使用无基离子介电材料的设备的注入障碍较低,电荷传输的激活能量减少.
结论:
- 门介电物的基组是OFET性能限制的关键来源.
- 消除这些基诱导的陷可以增强电荷载体的移动性,并减少注射障碍.
- 这项研究为优化OFET设计和应用提供了新的见解.
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