Effect of PEDOT:PSS ratio on the electrical and optical properties of OLEDs

Mario Petrosino, Paolo Vacca, Riccardo Miscioscia, Giuseppe Nenna, Carla Minarini, Alfredo Rubino

Research output: Contribution to conferencePaper

20 Citations (Scopus)


We report on the employ of several kinds of poly(3,4- ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) dispersions as hole injection layer to increase the stability and the charge injection in organic light emitting diodes (OLEDs). The PEDOT:PSS dispersions are different for PEDOT:PSS ratios and their properties were characterized by contact angle measurement, UV-Vis-IR transmittance and I-V characteristics. Multi layer ITO-PEDOT:PSS-PF6-Alq3-Al OLEDs have been manufactured and the electrical and optical properties have been extensively investigated and discussed in function of PEDOT:PSS ratio. We have found that a major quantity of PEDOT induces a decrement of ITO hole barrier and so an increment of OLED current and luminance. Performed transport analysis have pointed out that PEDOT:PSS carrier density NDhas a notable role in electrical transport at high bias.
Original languageEnglish
Publication statusPublished - 2007
Externally publishedYes
EventPhotonic Materials, Devices, and Applications II - , Spain
Duration: 1 Jan 2007 → …


ConferencePhotonic Materials, Devices, and Applications II
Period1/1/07 → …


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Petrosino, M., Vacca, P., Miscioscia, R., Nenna, G., Minarini, C., & Rubino, A. (2007). Effect of PEDOT:PSS ratio on the electrical and optical properties of OLEDs. Paper presented at Photonic Materials, Devices, and Applications II, Spain. https://doi.org/10.1117/12.722022