Gim, Yuseong Kang, Boseok Kim, BongSoo Kim, Sun-Guk Lee, Joong-Hee Cho, Kilwon Ku, Bon-Cheol Cho, Jeong Ho 2024-01-20T06:30:32Z 2024-01-20T06:30:32Z 2021-09-05 2015-09 2040-3364 https://pubs.kist.re.kr/handle/201004/125086 Atomically-thin molecular layers of aryl-functionalized graphene oxides (GOs) were used to modify the surface characteristics of source-drain electrodes to improve the performances of organic field-effect transistor (OFET) devices. The GOs were functionalized with various aryl diazonium salts, including 4-nitroaniline, 4-fluoroaniline, or 4-methoxyaniline, to produce several types of GOs with different surface functional groups (NO2-Ph-GO, F-Ph-GO, or CH3O-Ph-GO, respectively). The deposition of aryl-functionalized GOs or their reduced derivatives onto metal electrode surfaces dramatically enhanced the electrical performances of both p-type and n-type OFETs relative to the performances of OFETs prepared without the GO modification layer. Among the functionalized rGOs, CH3O-Ph-rGO yielded the highest hole mobility of 0.55 cm(2) V-1 s(-1) and electron mobility of 0.17 cm(2) V-1 s(-1) in p-type and n-type FETs, respectively. Two governing factors: (1) the work function of the modified electrodes and (2) the crystalline microstructures of the benchmark semiconductors grown on the modified electrode surface were systematically investigated to reveal the origin of the performance improvements. Our simple, inexpensive, and scalable electrode modification technique provides a significant step toward optimizing the device performance by engineering the semiconductor-electrode interfaces in OFETs. English ROYAL SOC CHEMISTRY SELF-ASSEMBLED MONOLAYERS REDUCED GRAPHENE OXIDE FILM TRANSISTORS HIGH-PERFORMANCE ELECTRICAL CHARACTERISTICS SOURCE/DRAIN ELECTRODES CHEMICAL-REDUCTION PENTACENE FILMS SURFACE TRANSPARENT Atomically-thin molecular layers for electrode modification of organic transistors Article 10.1039/c5nr03307a 1 NANOSCALE, v.7, no.33, pp.14100 - 14108 NANOSCALE 7 33 14100 14108 scie scopus 000359546900035 2-s2.0-84939157435 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article SELF-ASSEMBLED MONOLAYERS REDUCED GRAPHENE OXIDE FILM TRANSISTORS HIGH-PERFORMANCE ELECTRICAL CHARACTERISTICS SOURCE/DRAIN ELECTRODES CHEMICAL-REDUCTION PENTACENE FILMS SURFACE TRANSPARENT graphene oxide organic transistor electron mobility