Work Function Engineering of Electrohydrodynamic-Jet-Printed PEDOT:PSS Electrodes for High-Performance Printed Electronics
- Authors
- Lyu, B[Lyu, Benzheng]; Im, S[Im, Soeun]; Jing, H[Jing, Hongyue]; Lee, S[Lee, Sungjoo]; Kim, SH[Kim, Se Hyun]; Kim, JH[Kim, Jung Hyun]; Cho, JH[Cho, Jeong Ho]
- Issue Date
- Apr-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- PEDOT:PSS; work function; transistor; EHD printing; logic circuit
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.12, no.15, pp.17811 - 17817
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 12
- Number
- 15
- Start Page
- 17811
- End Page
- 17817
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/4887
- DOI
- 10.1021/acsami.0c02580
- ISSN
- 1944-8244
- Abstract
- Poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) has demonstrated outstanding performance as a charge transport layer or an electrode in various electronic devices, including organic solar cells, organic light-emitting diodes, and organic field-effect transistors (OFETs). The electrical properties of these devices are affected by the contact properties at the PEDOT:PSS-semiconductor junction. In this research, we performed work function (WF) engineering of electrohydrodynamic (EHD)-jet-printed PEDOT:PSS and successfully used it as an electrode to fabricate high-performance OFETs and complementary logic circuits. Two types of PEDOT:PSS materials-one with a high WF (HWF, 5.28 eV) and the other with a low WF (LWF, 4.53 eV)-were synthesized and EHD-jet-printed. The WF of PEDOT:PSS was deterministically modulated by approximately 0.75 eV through simple mixing of the two synthesized PEDOT:PSS materials in various ratios. OFETs fabricated with HWF and LWF PEDOT:PSS electrodes showed excellent electrical properties, including the ON/OFF switching ratio higher than 10(7) and the highest carrier mobility greater than 1 cm(2).V-1.s(-1). Furthermore, the HWF and LWF PEDOT:PSS electrodes were integrated to fabricate complementary metal-oxide-semiconductor (CMOS) NOT, NOR, and NAND circuits.
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