9,9'-Spirobifluorene and 4-phenyl-9,9'- spirobifluorene: pure hydrocarbon small molecules as hosts for efficient green and blue PhOLEDs - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Materials Chemistry C Année : 2014

9,9'-Spirobifluorene and 4-phenyl-9,9'- spirobifluorene: pure hydrocarbon small molecules as hosts for efficient green and blue PhOLEDs

Résumé

We report herein a new pure hydrocarbon material, 4-phenyl-9,9′-spirobifluorene (4-Ph-SBF), with a high triplet energy level (ET: 2.77 eV) as a host for blue phosphorescent organic light-emitting diodes (PhOLEDs). Structural, thermal, electrochemical and photophysical properties have been investigated in detail and compared to its constituting building block 9,9′-spirobifluorene (SBF) in order to precisely study the influence of the incorporation of a phenyl unit in C4. A surprising out of plane deformation of the fluorene ring and a highly twisted structure have been notably found for 4-Ph-SBF due to the substitution in C4. As both 4-Ph-SBF and SBF possess a high triplet energy level (2.77/2.87 eV resp.), they have been successfully used as host materials for green and blue PhOLEDs. The performance of blue PhOLEDs, ca. 20 cd A−1, appears to be among the highest reported for pure hydrocarbon derivatives.

Domaines

Chimie organique
Fichier non déposé

Dates et versions

hal-01151674 , version 1 (13-05-2015)

Identifiants

Citer

Sebastien Thiery, Denis Tondelier, Ce Declairieux, Seo Gijun, Bernard Geffroy, et al.. 9,9'-Spirobifluorene and 4-phenyl-9,9'- spirobifluorene: pure hydrocarbon small molecules as hosts for efficient green and blue PhOLEDs. Journal of Materials Chemistry C, 2014, 2 (21), pp.4156-4166. ⟨10.1039/c4tc00171k⟩. ⟨hal-01151674⟩
151 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More