| Titre : |
Multilayer OLEDs with four slot die-coated layers |
| Type de document : |
texte imprimé |
| Auteurs : |
Lisa Merklein, Auteur ; Marvin Mink, Auteur ; Dimitrios Kourkoulos, Auteur ; Benjamin Ulber, Auteur ; Sebastian M. Raupp, Auteur ; Klaus Meerholz, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 1643-1652 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Diodes électroluminescentes
Enduction par filière
Mesure
Morphologie (matériaux)
Photoréticulation
Poly(3,4-éthylènedioxythiophène)
Polystyrène sulfone
Revêtement en phase solvant
Revêtements multicouches
Revêtements organiques
Solubilité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
For the first time, multilayer OLEDs with four solution-processed layers are fabricated step-by-step using slot die coating. A suitable choice of coating parameters and fluid formulation enables the application of different material classes as large-area homogeneous layers with thicknesses in the nanometer range. The AFM measurements of the slot die-coated layers consisting of small molecules showed Ra values of 0.21–0.28 nm, less than previously reported in the literature. Based on a two-layer reference OLED consisting of a HIL and EML, the stack architecture is first extended by a crosslinked HTL. These three-layer OLEDs with a crosslinked HTL achieve 70% higher efficiency, compared to that of the reference devices, thus assuming successfully separated layers. In a further step, an additional ETL is applied via the orthogonal solvent approach to obtain four solution-processed layers. The averaged power efficiency of the four-layer OLEDs is increased by a factor of 2.2 compared to the reference OLEDs up to a value of 3.5 lm/W. Based on these results, it can be assumed that both approaches, the use of orthogonal solvents as well as the application of crosslinkable materials, have been successfully combined to fabricate multilayer OLEDs with four separated slot die-coated layers. |
| Note de contenu : |
- EXPERIMENTAL : Device architecture - Solubility measurements - Process parameters - Device fabrication - Layer and device characterization
- RESULTS AND DISCUSSION : Film morphology - Large-area layer homogeneity - OLED performance |
| DOI : |
10.1007/s11998-019-00225-2 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00225-2.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33417 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 6 (11/2019) . - p. 1643-1652
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