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Proceedings Paper

Effect of PEDOT:PSS ratio on the electrical and optical properties of OLEDs
Author(s): Mario Petrosino; Paolo Vacca; Riccardo Miscioscia; Giuseppe Nenna; Carla Minarini; Alfredo Rubino
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Paper 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 ND has a notable role in electrical transport at high bias.

Paper Details

Date Published: 12 June 2007
PDF: 9 pages
Proc. SPIE 6593, Photonic Materials, Devices, and Applications II, 659310 (12 June 2007); doi: 10.1117/12.722022
Show Author Affiliations
Mario Petrosino, Univ. of Salerno (Italy)
Paolo Vacca, Univ. of Salerno (Italy)
Enea Portici Research Ctr. (Italy)
Riccardo Miscioscia, Enea Portici Research Ctr. (Italy)
Giuseppe Nenna, Enea Portici Research Ctr. (Italy)
Carla Minarini, Enea Portici Research Ctr. (Italy)
Alfredo Rubino, Univ. of Salerno (Italy)

Published in SPIE Proceedings Vol. 6593:
Photonic Materials, Devices, and Applications II
Ali Serpengüzel; Gonçal Badenes; Giancarlo C. Righini, Editor(s)

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