Poster Sessions

2024 KPS Spring Meeting

Wednesday-Friday, November 4-6, 2020; Virtual Conference
Session P1-ap.4: Organic electronics and photonics
1:00 PM-1:50 PM, Thursday, November 05, 2020
Abstract: P1-ap.407* : Variation in optical and electronic properties of polymeric thin films by ultraviolet-ozone treatment  
Choi Seungsun
(Department of Physics, Kangwon National University)

LEE Hyun Bok *1,2, CHOI Seungsun 1,2, KIM Wonsik 1,2, SHIN Woojin 1,2, OH Jeawon 1, JIN Sila 2,3, JUNG Young Mee 2,3, RYU Mee-Yi 1
(1Department of Physics, Kangwon National University, 2Accelerator Science, Kangwon National University, 3Department of Chemistry, Kangwon National University)
  Organic semiconductors have been intensely investigated because of their unique properties, including mechanical flexibility and solution-processability. Hence, it has been used in various optoelectronic devices, including organic solar cells (OSCs) and organic light-emitting diodes (OLEDs). However, a short lifetime has been regarded as a critical factor that hinders their commercialization. In this regard, a fundamental understanding of degradation of polymers is necessary.
  In this study, we investigated the effect of ultraviolet-ozone (UVO) treatment on the electronic structures of poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT) and poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) films. To analyze the optical properties of the polymeric thin films according to the UVO treatment time, we performed UV-vis and photoluminescence (PL) spectroscopies. Also, the electronic structure of thin films were studied by using X-ray photoelectron spectroscopy (XPS). The significant oxidation and decrease in thickness were observed. This study provides a useful information on the surface modification of polymeric films.

F8BT, PFO, UVO treatment, electronic structure, XPS