TY - JOUR
T1 - Decoupling the Effects of Self-Assembled Monolayers on Gold, Silver, and Copper Organic Transistor Contacts
AU - Kim, Chang Hyun
AU - Hlaing, Htay
AU - Hong, Jong Am
AU - Kim, Ji Hoon
AU - Park, Yongsup
AU - Payne, Marcia M.
AU - Anthony, John E.
AU - Bonnassieux, Yvan
AU - Horowitz, Gilles
AU - Kymissis, Ioannis
N1 - Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - In bottom-contact organic field-effect transistors (OFETs), the functionalization of source/drain electrodes leads to a tailored surface chemistry for film growth and controlled interface energetics for charge injection. This report describes a comprehensive investigation into separating and correlating the energetic and morphological effects of a self-assembled monolayers (SAMs) treatment on Au, Ag, and Cu electrodes. Fluorinated 5,11-bis(triethylsilylethynyl) anthradithiophene (diF-TES-ADT) and pentafluorobenzenethiol (PFBT) are employed as a soluble small-molecule semiconductor and a SAM material, respectively. Upon SAM modification, the Cu electrode devices benefit from a particularly dramatic performance improvement, closely approaching the performance of OFETs with PFBT-Au and PFBT-Ag. Ultraviolet photoemission spectroscopy, polarized optical microscopy, grazing-incidence wide-angle X-ray scattering elucidate the metal work function change and templated crystal growth with high crystallinity resulting from SAMs. The transmission-line method separates the channel and contact properties from the measured OFET current-voltage data, which conclusively describes the impact of the SAMs on charge injection and transport behavior.
AB - In bottom-contact organic field-effect transistors (OFETs), the functionalization of source/drain electrodes leads to a tailored surface chemistry for film growth and controlled interface energetics for charge injection. This report describes a comprehensive investigation into separating and correlating the energetic and morphological effects of a self-assembled monolayers (SAMs) treatment on Au, Ag, and Cu electrodes. Fluorinated 5,11-bis(triethylsilylethynyl) anthradithiophene (diF-TES-ADT) and pentafluorobenzenethiol (PFBT) are employed as a soluble small-molecule semiconductor and a SAM material, respectively. Upon SAM modification, the Cu electrode devices benefit from a particularly dramatic performance improvement, closely approaching the performance of OFETs with PFBT-Au and PFBT-Ag. Ultraviolet photoemission spectroscopy, polarized optical microscopy, grazing-incidence wide-angle X-ray scattering elucidate the metal work function change and templated crystal growth with high crystallinity resulting from SAMs. The transmission-line method separates the channel and contact properties from the measured OFET current-voltage data, which conclusively describes the impact of the SAMs on charge injection and transport behavior.
KW - contact resistance
KW - copper
KW - organic field-effect transistors
KW - self-assembled monolayers
KW - transmission-line method
UR - http://www.scopus.com/inward/record.url?scp=84938632778&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938632778&partnerID=8YFLogxK
U2 - 10.1002/admi.201400384
DO - 10.1002/admi.201400384
M3 - Article
AN - SCOPUS:84938632778
VL - 2
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 2
M1 - 1400384
ER -