Enhancing light extraction efficiency in MDMO-PPV based OLEDs by incorporating 250 nm SiO2-colloidal crystals

J. C. Salcedo-Reyes; J. Vázquez; L. C. Jiménez; H. Méndez-Pinzón

doi:10.1117/12.2253743

16 February 2017 Enhancing light extraction efficiency in MDMO-PPV based OLEDs by incorporating SiO₂-250 nm colloidal crystals

J. C. Salcedo-Reyes, J. Vázquez, L. C. Jiménez, H. Méndez-Pinzón

Author Affiliations +

Proceedings Volume 10101, Organic Photonic Materials and Devices XIX; 101010D (2017) https://doi.org/10.1117/12.2253743
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

In this work, an improvement in light extraction efficiency from MDMO-PPV based OLEDs by using colloidal crystals is demonstrated. The optimal SiO₂ sphere diameter for the colloidal crystal was calculated by the Plane Wave Expansion Method (PWEM), taking into account the dispersion relation of the system formed by a face-centered cubic colloidal crystal (FCC) infiltrated within the luminescent polymer MDMO-PPV. The fabrication method of such a polymer layer with a photonic crystal beneath by spin coating was proved and patented. Therefore, devices with the structure ITO/PEDOT/MDMO-PPV+SiO₂ colloidal crystal/Ag were elaborated. Compared with standard OLEDs containing a single MDMO-PPV luminescent layer, the external quantum efficiency of devices modified with a colloidal crystal matrix within the MDMO-PPV layer shows a significant increment, as evaluated from the optical power as a function of applied bias for both kinds of devices.

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Citation Download Citation

J. C. Salcedo-Reyes, J. Vázquez, L. C. Jiménez, and H. Méndez-Pinzón "Enhancing light extraction efficiency in MDMO-PPV based OLEDs by incorporating SiO₂-250 nm colloidal crystals", Proc. SPIE 10101, Organic Photonic Materials and Devices XIX, 101010D (16 February 2017); https://doi.org/10.1117/12.2253743

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