Abstract
Conjugated polymers are desired as organic electrode materials because of their functional properties such as solution process, low cost, and transparency. Poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS), in particular, shows the highest applicability, but its heterogeneous structure presents limitations in terms of electrical conductivity. In this study, a facile method to fabricate multi-layered thin films with higher ordered structures was developed. Through the etching process with H2SO4 and dimethyl sulfoxide(DMSO), the insulated rich-PSS was removed from the upper layer to improve its electrical properties and rearrange the PEDOT molecular structures. The thickness of PEDOT:PSS thin films was experimentally optimized to maximize the enhancement of carrier mobility via a layer-by-layer (LBL) process. The combined method, consisted of etching and the LBL process, showed the improvement of the charge carrier mobility from 0.62 to 2.80 cm2 V−1 s−1 . The morphology and crystallinity of the ordered PEDOT:PSS structure were investigated by X-ray photoemission spectroscopy (XPS), Raman, and X-ray diffraction (XRD). As a result, two-dimensional lamellar-stacked PEDOT:PSS thin films were fabricated through the repetitive etching and LBL process. The optimized PEDOT:PSS thin film showed an excellent electrical conductivity of 3026 S cm−1, which is 3.8 times higher than that of the pristine film (801 S cm−1).
| Original language | English |
|---|---|
| Article number | 2211 |
| Pages (from-to) | 1-10 |
| Number of pages | 10 |
| Journal | Nanomaterials |
| Volume | 10 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2020 Nov |
Bibliographical note
Funding Information:Author Contributions: Y.K. (Youngno Kim) and Y.K. (Yunryeol Kim) conceived and conducted the experiments. AYu.Kth. (oYroCuonngtnroibKuitmio)nws: rYo.tKe.t (hYeomunaginnmo Kanimus) carnipdt Yte.Kxt..(YY.uKn.r(yYeuonl rKyiemol) Kcoinmc)ehiveelpdeadndw citohntdhuecpterdo ctehses eoxppteimrimizeantitosn. Y.K. (Youngno Kim) wrote the main manuscript text. Y.K. (Yunryeol Kim) helped with the process optimization of sampling for analysis. J.H.K. designed and supervised the research. All authors discussed the results and cFoumnmdienngte: dT ohnis three smeaarncuhscwriapst. sAulplpaourttheodrsb hyavthee reTaedchannodl oaggryeeIndn toov tahteiopnubPlrisohgerdam ve(r2si0o0n02o9f 3t1h)e fmunanduedscrbipyt.the Ministry of Trade, Industry, and Energy (MOTIE, Korea). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education M(NinRiFst-r2y01o9fR T1rAad6eA, 1InAd1u10st5r5y6,6 a0n),d( NEnReFr-g2y02(M0MO3THIE4A, K3o08re1a8)2.1 T),haisn dreUsenairvcehr switaiess sluepadpionrgteldab b-yspBeacsifiicc Ssctaiernt-cuep Rsethseroarucghh Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660), (NRF-2020M3H4A3081821), and Universities leading lab-specific start-ups through the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No.
Funding Information:
This research was supported by the Technology Innovation Program (20002931) funded by the Ministry of Trade, Industry, and Energy (MOTIE, Korea). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660), (NRF-2020M3H4A3081821), and Universities leading lab-specific start-ups through the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 1711098902).
Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Science(all)