通过应变工程提高有机半导体的迁移率
Boosting the mobility of organic semiconductors through strain engineering
汪兆锋 1武显硕 1杨书院 1姚佳荣 2沈贤锋 1高丕超 1姚惜梦 1曾东 1李荣金 1胡文平1
作者信息
- 1. Key Laboratory of Organic Integrated Circuit,Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,School of Science,Tianjin University,Tianjin 300072,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China
- 2. Key Laboratory of Organic Integrated Circuit,Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,School of Science,Tianjin University,Tianjin 300072,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China;Engineering Research Center of Coal-Based Ecological Carbon Sequestration Technology of the Ministry of Education,Shanxi Datong University,Datong 037009,China
- 折叠
摘要
有机半导体(OSCs)是推动柔性电子发展的关键.然而,其应用一直受到其较低迁移率的阻碍.虽然分子工程和器件工程可以提高OSC迁移率,但近年来进展几乎停滞不前.本研究揭示了有机半导体在应变下的层数依赖电荷输运特性,并通过应变工程可大幅提高其迁移率.施加应变可以减小分子间π-π间距并减少电子-声子散射,从而提高电荷输运效率.我们观察到应变因子和材料厚度之间存在直接相关性,较薄的晶体具有较高的应变因子.使用分子级薄的二维分子晶体,我们观察到迁移率显著提高了58％.我们的研究结果为提高有机半导体的迁移率开辟了新的途径.
Abstract
Organic semiconductors(OSCs)are pivotal for advancing flexible electronics.However,their application has been severely hindered by their poor mobility.Although mo-lecular and device engineering can improve OSC mobility,progress has stagnated in recent years.In this study,we un-covered the layer-dependent charge transport properties of OSCs under strain and substantially enhanced their mobility by strain engineering.Applying strain reduced intermolecularπ-π spacing and electron-phonon scattering,thereby im-proving the charge transport efficiency.We observed a direct correlation between strain factor and material thickness,with thinner crystals demonstrating higher strain factors.Using molecularly thin two-dimensional molecular crystals,we achieved a substantial 58％increase in mobility.Our findings open new avenues to enhancing the mobility of OSCs.
关键词
2D molecular crystal/organic field-effect transistor/mobility/strain engineeringKey words
2D molecular crystal/organic field-effect transistor/mobility/strain engineering引用本文复制引用
基金项目
National Natural Science Foundation of China(52073206)
National Natural Science Foundation of China(52273193)
Fundamental Research Funds for the Central Universities()
Tianjin University 2021 Postgraduate Education Special Fund(B2-2021-005)
出版年
2024
NETL
NSTL
万方数据