Non-doped, blue-emitting, color-stable, organic light-emitting diode based on 2,2':6',2 double prime -ternaphthalene

• Published in: Applied physics. A, Materials science & processing Vol. 115; no. 3; pp. 731 - 735
• Main Authors: Schwabegger, Guenther, Dingemans, Theo, Resel, Roland, Sitter, Helmut, Simbrunner, Clemens
• Format: Journal Article
• Language: English
• Published: 01-06-2014
• Subjects: Crystal structure; Glass; Indium; Materials science; Naphthalene; Organic light-emitting diodes; Styrenes; Sulfonates
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-014-8408-1

A novel non-doped blue-emitting material, 2,2':6',2 double prime -ternaphthalene (NNN), which is based on three naphthalene units forming a rodlike molecule, has been synthesized and characterized. Organic light-emitting diodes based on NNN as emitter exhibit blue emission with Commission Internationale de l'Eclairage color coordinates of x = 0.18 and y = 0.11. In addition, the morphology and crystallographic structure of the NNN thin films has been investigated. NNN deposited on poly[3,4-(ethylenedioxy) thiophene]:poly (styrene sulfonate) on Indium Tin Oxide-covered glass forms crystalline structures of high crystallographic quality. The molecules are aligned almost perpendicular to the substrate surface and exhibit a tilt angle of 23 $\circ }$ .