Bright and efficient inverted organic light-emitting diodes with improved solution-processed electron-transport interlayers
| Auteurs | Murat Y., Langer E., Barnes J.-P., Laurent J.-Y., Wantz G., Hirsch L., Maindron T. |
| Year | 2017-0434 |
| Source-Title | Organic 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 |
| ISSN | 15661199 |
| Lien vers article | Link |