Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1265586 | Organic Electronics | 2008 | 5 Pages |
Abstract
We coated gold electrodes with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in order to reduce the contact resistance in pentacene organic field-effect transistors (OFETs). The crystallinity of the pentacene layers on the gold electrodes was found to increase upon coating the substrates with PEDOT:PSS, whereas the hole-injection barrier between the organic semiconductor and the metal electrode decreased from 0.85 to 0.14 eV. The increased crystallinity and reduced hole-injection barrier resulted in a significant reduction of the contact resistance in the pentacene OFETs, thus leading to an improvement of the field-effect mobility of the devices (from 0.031 to 0.218 cm2/Vs).
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Authors
Kipyo Hong, Sang Yoon Yang, Chanwoo Yang, Se Hyun Kim, Danbi Choi, Chan Eon Park,