在单晶有机薄膜晶体管中的库伦阻塞传输
1Department of Applied Physics, and Materials Science Center, University of Groningen, The Netherlands. alex.schoonveld@philips.com
Nature
|May 9, 2000
概括
库伦阻塞传输,其中电子相互作用阻断电路流,在有机薄膜晶体管的室温下观察到. 这是由于分子位点的大小小,增强充电能量.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
背景情况:
- 库伦阻塞运输需要很大的道阻力和充电能量.
- 之前对金属岛屿的观测需要极低的温度,因为它们的容量很大.
- 有机薄膜晶体管 (OTFT) 提供了室温库伦阻塞的潜力.
研究的目的:
- 为了研究有机薄膜晶体管中的库伦阻塞传输.
- 为了在分子阵列中展示室温库伦阻塞.
- 探索分子大小对充电能量和运输的影响.
主要方法:
- 使用高度排序的分子材料制造OTFT.
- 导电性测量作为门偏差和温度的函数.
- 在库伦堡封锁模型框架内分析运输特征.
主要成果:
- 有机薄膜晶体管在室温下显示库伦阻塞传输.
- 亚纳米分子位点导致显著的充电能量,主导热能 (kT).
- 观察到与库伦封锁模型相一致的热激活传输.
结论:
- 在OTFT中,高度排序的分子材料可以作为库伦阻塞站点的阵列.
- 分子位点的小容量使室温库伦阻塞成为可能,克服了以前系统的局限性.
- 这项工作为基于分子库伦阻塞现象的新型电子设备开辟了道路.
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