title: Soft-Etching Copper and Silver Electrodes for Significant Device Performance Improvement toward Facile, Cost-Effective, Bottom-Contacted, Organic Field-Effect Transistors.
abstract: Poor charge injection and transport at the electrode/semiconductor contacts has been so far a severe performance hurdle for bottom-contact bottom-gate (BCBG) organic field-effect transistors (OFETs). Here, we have developed a simple, economic, and effective method to improve the carrier injection efficiency and obtained high-performance devices with low cost and widely used source/drain (S/D) electrodes (Ag/Cu). Through the simple electrode etching process, the work function of the electrodes is more aligned with the semiconductors, which reduces the energy barrier and facilitates the charge injection. Besides, the formation of the thinned electrode edge with desirable micro/nanostructures not only leads to the enlarged contact side area beneficial for the carrier injection but also is in favor of the molecular self-organization for continuous crystal growth at the contact/active channel interface, which is better for the charge injection and transport. These effects give rise to the great reduction of contact resistance and the amazing improvement of the low-cost bottom-contact configuration OFETs performance.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.|University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China.
authors.forename: Zongrui
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.|Department of Chemistry, Capital Normal University , Beijing 100089, People's Republic of China.
authors.forename: Huanli
authors.initials: H
authors.lastname: Dong
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Zou
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.|University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.
authors.forename: Jiahui
authors.initials: J
authors.lastname: Tan
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.|Key Laboratory of Molecular Optoelectronic Sciences, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.
authors.forename: Xiuqiang
authors.initials: X
authors.lastname: Lu
authors.affiliation: School of Materials Science & Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798.
authors.forename: Jinchong
authors.initials: J
authors.lastname: Xiao
authors.affiliation: School of Materials Science & Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798.
authors.forename: Qichun
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.|Key Laboratory of Molecular Optoelectronic Sciences, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, China.
authors.forename: Wenping
authors.initials: W
authors.lastname: Hu
keywords: bottom-contact organic field-effect transistor; contact resistance; low-cost electrode; micro/nanostructures; soft-etching method