Systematic optimization of MWCNT-PEDOT:PSS composite electrodes for organic transistors and dye-sensitized solar cells: Effects of MWCNT diameter and purity
- Authors
- Yun, Dong-Jin; Jeong, Yong Jin; Ra, Hyemin; Kim, Jung-Min; An, Tae Kyu; Rhee, Shi-Woo; Jang, Jaeyoung
- Issue Date
- Jan-2018
- Publisher
- ELSEVIER
- Keywords
- Multi-walled carbon nanotube (MWCNT); PEDOT:PSS; Hydrochloric acid-methanol treatment; Organic thin-film transistors; Dye-sensitized solar cells
- Citation
- ORGANIC ELECTRONICS, v.52, pp.7 - 16
- Indexed
- SCIE
SCOPUS
- Journal Title
- ORGANIC ELECTRONICS
- Volume
- 52
- Start Page
- 7
- End Page
- 16
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4744
- DOI
- 10.1016/j.orgel.2017.10.007
- ISSN
- 1566-1199
- Abstract
- Multi-walled carbon nanotubes (MWCNTs) and polymer composites have attracted significant attention as metal-free electrode materials for various electronic devices. Many studies have presented strategies to enhance the electrical conductivity of MWCNT/polymer composites. However, systematic studies on the effects of MWCNT features on the composite properties are still missing. Such studies can further the development of MWCNT/polymer-based conducting materials. Herein, we characterize composite films of MWCNTs and poly(3,4-ethylenedioxythiophene) polymerized with poly(4-styrenesulfonate) (PEDOT:PSS), with variations in the MWCNT diameter and purity. MWCNT features greatly affect the physical/chemical/electrical properties of the MWCNT/PEDOT:PSS composite films. In addition, the diameter and purity of MWCNTs also influenced the transition behavior of the composite films during the hydrochloric acid-methanol treatment, which was performed for increasing electrical conductivity. As a result, we could optimize the performance of organic transistors and dye-sensitized solar cells (DSSCs) using MWCNT/PEDOT:PSS composite films as source/drain electrodes and catalytic counter electrodes, respectively. Furthermore, using the optimized device parameters, we successfully fabricated high performance fluorine doped tin oxide-free DSSCs and high-gain organic complementary inverters using MWCNT/PEDOT:PSS composite electrodes.
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