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Efficient OLEDs Fabricated by Solution Process Based on Carbazole and Thienopyrrolediones Derivatives.


ABSTRACT: Four low molecular weight compounds-three of them new, two of them with carbazole (Cz) as functional group and the other two with thienopyrroledione (TPD) group-were used as emitting materials in organic light emitting diodes (OLEDs). Devices were fabricated with the configuration ITO/PEDOT:PSS/emitting material/LiF/Al. The hole injector layer (HIL) and the emitting sheet were deposited by spin coating; LiF and Al were thermally evaporated. OLEDs based on carbazole derivatives show luminances up to 4130 cd/m², large current efficiencies about 20 cd/A and, cautiously, a very impressive External Quantum Efficiency (EQE) up to 9.5%, with electroluminescence peaks located around 490 nm (greenish blue region). Whereas, devices manufactured with TPD derivatives, present luminance up to 1729 cd/m², current efficiencies about 4.5 cd/A and EQE of 1.5%. These results are very competitive regarding previous reported materials/devices.

SUBMITTER: Lozano-Hernandez LA 

PROVIDER: S-EPMC6017460 | biostudies-other | 2018 Jan

REPOSITORIES: biostudies-other

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Efficient OLEDs Fabricated by Solution Process Based on Carbazole and Thienopyrrolediones Derivatives.

Lozano-Hernández Luis-Abraham LA   Maldonado José-Luis JL   Garcias-Morales Cesar C   Espinosa Roa Arian A   Barbosa-García Oracio O   Rodríguez Mario M   Pérez-Gutiérrez Enrique E  

Molecules (Basel, Switzerland) 20180130 2


Four low molecular weight compounds-three of them new, two of them with carbazole (Cz) as functional group and the other two with thienopyrroledione (TPD) group-were used as emitting materials in organic light emitting diodes (OLEDs). Devices were fabricated with the configuration ITO/PEDOT:PSS/emitting material/LiF/Al. The hole injector layer (HIL) and the emitting sheet were deposited by spin coating; LiF and Al were thermally evaporated. OLEDs based on carbazole derivatives show luminances up  ...[more]

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