TY - JOUR
T1 - Effect of UV-ozone treatment on electrical properties of PEDOT:PSS film
AU - Nagata, Takahiro
AU - Oh, Seungjun
AU - Chikyow, Toyohiro
AU - Wakayama, Yutaka
N1 - Funding Information:
This work was supported in part by the Bilateral Joint Project involving Hungary and Japan established by the Japan Society for the Promotion of Science (JSPS). A portion of this work was performed in the MANA foundry station, part of the World Premier International Research Center Initiative (WPI Program) established by the Ministry of Education, Culture, Sports, Science and Technology.
PY - 2011/2
Y1 - 2011/2
N2 - We reveal the effect of UV-ozone treatment on the electrical properties of poly (styrenesulfonate) doped poly (3,4-ethylenedioxythiophene) (PEDOT:PSS) film by clarifying the respective roles of UV light irradiation and exposure to ozone gas. The UV-ozone treatment induced increases in both work function and resistivity. Furthermore, the film thickness was reduced at a rate of 0.13 nm/min. The ozone-exposed films also exhibited a marked increase in the work function. However, such variations were not observed in the resistivity and film etching. Angle resolved X-ray photoelectron spectroscopy revealed that the main role of the UV light was to decompose the chemical bonds in the PEDOT:PSS film, resulting in a resistivity increase and film etching. In contrast, the ozone and atomic oxygen were absorbed and oxidized the surface, which was responsible for the increase in the work function. Due to these different functions, UV-ozone treatment is capable of controlling the work function and resistivity of PEDOT:PSS film thus allowing them be adjusted to the device application.
AB - We reveal the effect of UV-ozone treatment on the electrical properties of poly (styrenesulfonate) doped poly (3,4-ethylenedioxythiophene) (PEDOT:PSS) film by clarifying the respective roles of UV light irradiation and exposure to ozone gas. The UV-ozone treatment induced increases in both work function and resistivity. Furthermore, the film thickness was reduced at a rate of 0.13 nm/min. The ozone-exposed films also exhibited a marked increase in the work function. However, such variations were not observed in the resistivity and film etching. Angle resolved X-ray photoelectron spectroscopy revealed that the main role of the UV light was to decompose the chemical bonds in the PEDOT:PSS film, resulting in a resistivity increase and film etching. In contrast, the ozone and atomic oxygen were absorbed and oxidized the surface, which was responsible for the increase in the work function. Due to these different functions, UV-ozone treatment is capable of controlling the work function and resistivity of PEDOT:PSS film thus allowing them be adjusted to the device application.
KW - Conductive polymer
KW - Organic conducting material
KW - UV-ozone treatment
KW - Work function
KW - X-ray photoemission spectroscopy
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U2 - 10.1016/j.orgel.2010.11.009
DO - 10.1016/j.orgel.2010.11.009
M3 - Article
AN - SCOPUS:78650277569
VL - 12
SP - 279
EP - 284
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
IS - 2
ER -