Using anisotropic thermal expansion in organic semiconductor thin films

在有机半导体薄膜中利用各向异性热膨胀

• 批准号: DP170102145
• 负责人: Prof Christopher McNeill
• 金额: $ 30.44万
• 依托单位: Monash University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2017
• 资助国家: 澳大利亚
• 起止时间: 2017-01-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP170102145
• 关键词: Using; anisotropic; thermal; expansion; organic

This project aims to capitalise upon the recent discovery of negative thermal expansion in high-performance organic semiconductor films. Certain molecules’ chemical structures have a planar conjugated core and flexible sidechains. When highly anisotropic thermal expansion occurs, the sidechains take up most of the thermal expansion. When a negative thermal expansion occurs, the pi-pi stacking distance decreases upon annealing. This effect has been linked with higher charge mobilities, and a tighter molecular packing is locked in upon cooling. The potential applications of these high performance organic semiconductors includes chemical/biosensors, electronic paper, and radio frequency identification cards.

该项目旨在利用最近在高性能有机半导体薄膜中发现的负热膨胀。某些分子的化学结构具有平面共轭核和柔性侧链。当发生高度各向异性的热膨胀时，侧链占据大部分热膨胀。当发生负热膨胀时，在退火时π-π堆叠距离减小。这种效应与更高的电荷迁移率有关，并且在冷却时锁定了更紧密的分子堆积。这些高性能有机半导体的潜在应用包括化学/生物传感器、电子纸和射频识别卡。