Interfacial molecular screening of polyimide dielectric towards high-performance organic field-effect transistors

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外文摘要：The compatibility of the gate dielectrics with semiconductors is vital for constructing efficient conduct-ing channel for high charge transport.However,it is still a highly challenging mission to clearly clarify the relationship between the dielectric layers and the chemical structure of semiconductors,especially vacuum-deposited small molecules.Here,interfacial molecular screening of polyimide(Kapton)dielectric in organic field-effect transistors(OFETs)is comprehensively studied.It is found that the semiconduct-ing small molecules with alkyl side chains prefer to form a high-quality charge transport layer on poly-imide(PI)dielectrics compared with the molecules without alkyl side chains.On this basis,the fabricated transistors could reach the mobility of 1.2 cm2 V-1 s-1 the molecule with alkyl side chains on bare PI dielectric.What is more,the compatible semiconductor and dielectric would further produce a low acti-vation energy(EA)of 3.01 meV towards efficient charge transport even at low temperature(e.g.,100 K,0.9 cm2 V-1 s-1).Our research provides a guiding scheme for the construction of high-performance thin-film field-effect transistors based on PI dielectric layer at room and low temperatures.

外文关键词：

Interfacial molecular screeningPolyimide dielectricsOrganic semiconductorsInterface engineeringThin-film transistors

作者：

Yingshuang Zheng、Huchao Li、Ting Jiang、Fei Jiao、Jie Li、Yong Lei、Guofeng Tian、Jinshun Bi、Yundong Xuan、Liqiang Li、Deyang Ji、Wenping Hu

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作者单位：

Department of Chemistry,Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Institute of Molecular Aggregation Science,Tianjin University,Tianjin 300072,China

GPL Photonics Laboratory,State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China

Department of Chemistry,Tianjin Key Laboratory of Molecular Optoelectronic Sciences,School of Science,Collaborative Innovation Center of Chemical Science and Engineering,Tianjin University,Tianjin 300072,China

Joint School of National University of Singapore and Tianjin University,Fuzhou 350207,China

Fachgebiet Angewandte Nanophysik,Institut für Physik & IMN MacroNano,Technische Universität Ilmenau,Ilmenau 98693,Germany

State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China

Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100029,China

University of Chinese Academy of Sciences,Beijing 100101,China

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基金：

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Haihe Laboratory of Sustainable Chemical Transformations

项目编号：

2021YFA07179002022YFE0124200620041385227319061905121U2241221

出版年：

2024

DOI：

10.1016/j.cclet.2023.108796

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(2)

参考文献量40