Organic light-emitting devices based on conducting polymer treated with benzoic acidopen access
- Authors
- Kang, Hwa Seung; Kim, Dae Hun; Kim, Tae Whan
- Issue Date
- Jan-2021
- Publisher
- Nature Research
- Citation
- Scientific Reports, v.11, no.1, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- Scientific Reports
- Volume
- 11
- Number
- 1
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1640
- DOI
- 10.1038/s41598-021-82980-0
- ISSN
- 2045-2322
- Abstract
- We report on the enhanced conductivity of the benzoic-acid-treated poly(3,4-ethlenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) electrode for use in highly flexible, organic light-emitting devices (OLEDs). The conductivity of the benzoic-acid-treated PEDOT:PSS electrode increased from 1 to 1583.2 S/cm, in comparison with that of the pristine PEDOT:PSS electrode, due to a complex factor of the H+ mole % and the dielectric constant of the benzoic solution. Among the post-treatment methods of the PEDOT:PSS electrodes, the operating voltage at 1000?cd/m2 of OLEDs fabricated utilizing the PEDOT:PSS electrode with the benzoic acid treatment has the lowest value, and its maximum luminance is 24,400?cd/m2, which are 1.54 and 2.15 times higher than those of OLEDs using PEDOT:PSS electrodes treated with dimethyl sulfoxide and methanol, respectively. The luminance of a flexible OLED with a benzoic-acid-treated PEDOT:PSS electrode after 1400 bending cycles decreased to 83% of the initial luminance, resulting in excellent mechanical stability.
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