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

doi:10.1117/12.722022

12 June 2007 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

Proceedings Volume 6593, Photonic Materials, Devices, and Applications II; 659310 (2007) https://doi.org/10.1117/12.722022
Event: Microtechnologies for the New Millennium, 2007, Maspalomas, Gran Canaria, Spain

Abstract

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 N_D has a notable role in electrical transport at high bias.

Citation Download Citation

Mario Petrosino, Paolo Vacca, Riccardo Miscioscia, Giuseppe Nenna, Carla Minarini, and Alfredo Rubino "Effect of PEDOT:PSS ratio on the electrical and optical properties of OLEDs", Proc. SPIE 6593, Photonic Materials, Devices, and Applications II, 659310 (12 June 2007); https://doi.org/10.1117/12.722022

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