Contribution of O2 plasma treatment and amine modified GOs on film properties of conductive PEDOT:PSS: Application in indium tin oxide free solution processed blue OLED

• Published in: Current applied physics 2019, 19(8), , pp.910-916
• Main Authors: Diker, Halide, Yesil, Fatih, Varlikli, Canan
• Format: Article
• Language: English
• Subjects: Efficiency roll-off; Graphene; Modified graphene; O2 plasma; PH1000; Solution processed OLED; 물리학
• ISSN: 1567-1739; 1878-1675
• DOI: 10.1016/j.cap.2019.04.018

Primary (n-propyl amine, n-PRYLA), secondary (dipropyl amine, DPRYLA) and alcohol (propanol amine, PRPOHA) amine derivatives were used as amine sources in graphene oxide (GO) modification and obtained samples were named as nPRYLA-GO, DPRYLA-GO and PRPOHA-GO, respectively. Modified graphene oxide (mGO) derivatives were doped in poly (3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PH1000) and O2 plasma treatment (70W, 3 min) was applied on the spin casted films. PH1000:mGO films presented high optical transparency values (>90%) and low resistivity (177–183 Ω/sq). The roughness values were increased especially when the hydrophobic alkyl chain containing DPRYLA-GO and nPRYLA-GO were doped in PH1000. Prepared films were utilized as anode in solution processed blue organic light emitting diode. PH1000:PRPOHA-GO anode presented more than 30 nm of decrement in full with at half maximum and 1.6, 1.5 and 1.9 fold enhancements in current, power and external quantum efficiency values, compared to those of ITO anode, respectively. [Display omitted] •Contribution of O2 plasma on film properties of PH1000 is investigated.•O2 plasma exposure increased both the roughness and transmittance of PH1000 film.•Amine-modified graphene oxides (mGOs) are synthesized and used as dopants in PH1000.•PH1000:mGO(@EG) anodes increased the blue OLED performances compared to ITO anode.•Alcohol amine mGO doped PH1000 anode revealed the best performance.