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Proceedings Paper

OLEDs fabricated by solution process based on a novel linear poly(arylene oxindole)
Author(s): L. A. Lozano-Hernández; Olivia Hernández-Cruz; E. Pérez-Gutiérrez; M. Rodríguez; O. Barbosa-García; Gabriel Ramos-Ortíz; Mikhail G. Zolotukhin; J. L. Maldonado
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Paper Abstract

In this work, OLEDs based on a new modified polymer PMC 300* (as emissive layer: EML) were manufactured with the structure ITO/PEDOT:PSS/Polymer (PMC 300*)/LiF or PFN/Al. This new polymer PMC 300*: Poly[(Benzo[c][1,2,5]thiadiazole-4,7-diylbis(9,9-dimethyl-9H-fluorene-7,2-diyl))-3,3-diyl(1-(3- (trifluoromethyl)phenyl)-2-oxindole)], is a modified version of PF-1 polymer that was synthesized and used previously in our group for non-linear optical properties and in OLED devices. The CF3 additional group on PMC 300* showed an improved electroluminescence and current efficiency on OLED devices. PF-1 and PMC 300* polymers have a fluorescence quantum yield (FLQY) of approximately 1. Film formation of the hole injection layer (HIL) and the EML were made by spin coating and subsequently evaporating LiF (or PFN by spin coating) and Al as cathode. Polymer films show a very low roughness (~ 1-2 nm), as most of the polymers used in OLEDs. Due to PMC 300* excellent properties like high solubility, very high QY, high conjugation and mechanical characteristics, OLEDs based on this new modified polymer (with emission in green-yellow wavelengths) showed luminances up to 1937 cd/m2, high current efficiencies of 35 cd/A and a maximum external quantum efficiency (EQEmax) of 2.6 %. Additionally, preliminary tests of flexible OLEDs by using this polymer are currently carrying out, results are promising.

Paper Details

Date Published: 25 September 2018
PDF: 8 pages
Proc. SPIE 10736, Organic Light Emitting Materials and Devices XXII, 107362B (25 September 2018); doi: 10.1117/12.2322752
Show Author Affiliations
L. A. Lozano-Hernández, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Olivia Hernández-Cruz, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Univ. Nacional Autónoma de México (Mexico)
E. Pérez-Gutiérrez, Consejo Nacional de Ciencia y Tecnología (Mexico)
Univ. Autónoma de Puebla (Mexico)
M. Rodríguez, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
O. Barbosa-García, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Gabriel Ramos-Ortíz, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Mikhail G. Zolotukhin, Univ. Nacional Autónoma de México (Mexico)
J. L. Maldonado, Ctr. de Investigaciones en Óptica, A.C. (Mexico)

Published in SPIE Proceedings Vol. 10736:
Organic Light Emitting Materials and Devices XXII
Chihaya Adachi; Jang-Joo Kim; Franky So, Editor(s)

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