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Performance comparison of pentacene organic field-effect transistors with SiO2 modified with octyltrichlorosilane or octadecyltrichlorosilane
, K.A. Knauer, A. Dindar, B. Kippelen
Published in Elsevier B.V.
Volume: 13
Issue: 1
Pages: 18 - 22
Performance of pentacene organic field-effect transistors (OFETs) is significantly improved by treatment of SiO2 with octyltrichlorosilane (OTS-8) compared to octadecyltrichlorosilane (OTS-18). The average hole mobility in these OFETs is increased from 0.4 to 0.8 cm2/Vs when treating the dielectric with OTS-8 versus OTS-18 treated devices. The atomic force microscope (AFM) images show that the OTS-8 treated surface produces much larger grains of pentacene (∼500 nm) compared to OTS-18 (∼100 nm). X-ray diffraction (XRD) results confirmed that the pentacene on OTS-8 is more crystalline compared to the pentacene on OTS-18, resulting in higher hole mobility. © 2011 Elsevier B.V. All rights reserved.
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JournalData powered by TypesetOrganic Electronics
PublisherData powered by TypesetElsevier B.V.