High mobility organic field-effect transistor based on water-soluble deoxyribonucleic acid via spray coating

Journal Article · Mon Jan 26 04:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4907325· OSTI ID:22415211

Shi, Wei; Han, Shijiao; Huang, Wei; Yu, Junsheng ^[1]

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1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054 (China)

High mobility organic field-effect transistors (OFETs) by inserting water-soluble deoxyribonucleic acid (DNA) buffer layer between electrodes and pentacene film through spray coating process were fabricated. Compared with the OFETs incorporated with DNA in the conventional organic solvents of ethanol and methanol: water mixture, the water-soluble DNA based OFET exhibited an over four folds enhancement of field-effect mobility from 0.035 to 0.153 cm{sup 2}/Vs. By characterizing the surface morphology and the crystalline structure of pentacene active layer through atomic force microscope and X-ray diffraction, it was found that the adoption of water solvent in DNA solution, which played a key role in enhancing the field-effect mobility, was ascribed to both the elimination of the irreversible organic solvent-induced bulk-like phase transition of pentacene film and the diminution of a majority of charge trapping at interfaces in OFETs.

• OSTI ID: 22415211
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 106; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC FORCE MICROSCOPY
DNA
ETHANOL
FIELD EFFECT TRANSISTORS
LAYERS
MATHEMATICAL SOLUTIONS
METHANOL
ORGANIC SOLVENTS
PENTACENE
SPRAY COATING
SPRAYED COATINGS
SURFACES
WATER
X-RAY DIFFRACTION