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Bright and efficient inverted organic light-emitting diodes with improved solution-processed electron-transport interlayers

Published on 29 March 2018
Bright and efficient inverted organic light-emitting diodes with improved solution-processed electron-transport interlayers
Description
 
Date 
Authors
Murat Y., Langer E., Barnes J.-P., Laurent J.-Y., Wantz G., Hirsch L., Maindron T.
Year2017-0434
Source-TitleOrganic Electronics: physics, materials, applications
Affiliations
Univ. Bordeaux, IMS, UMR CNRS 5218, Bordeaux INP/ENSCBP, 16 Av. Pey Berland, Pessac, France, Université de Grenoble-Alpes, CEA Leti, MINATEC Campus, 17 Rue des Martyrs, Grenoble, France
Abstract
Highly efficient inverted organic light-emitting diodes (iOLEDs) are reported by including in the structure a surface modifier, polyethylenimine-ethoxylated (PEIE), to decrease the cathode work function and a hole blocking layer, 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi) to increase the efficiency of the device. The two compounds have been processed in a single step, by using a mixture PEIE:TPBi spun from the same solution. It is demonstrated by time-of-flight secondary-ion mass spectrometry (TOF-SIMS) that a bilayer is formed and same performances as the separately processed materials are obtained. This technic enables to reach high luminances (40 000 cd m?2) and high current efficiencies (13 cd/A) using the conjugated Super Yellow (SY) polymer as the emissive layer while reducing the number of processing steps. © 2017 Elsevier B.V.
Author-Keywords
Binary blend, Inverted OLEDs, Polyethylenimine ethoxylated (PEIE), TOF-SIMS, Wet-process
Index-Keywords
Conjugated polymers, Efficiency, Light emitting diodes, Mass spectrometry, Organic light emitting diodes (OLED), Shotcreting, Binary blends, Inverted OLEDs, Polyethylenimine ethoxylated, ToF SIMS, Wet process, Secondary ion mass spectrometry
ISSN15661199
LinkLink

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