| Téléchargement | - Voir le manuscrit accepté : 3D monodisperse oligofluorenes with non-conjugated triphenylamine-based cores : Synthesis and optoelectronic properties (PDF, 970 Kio)
|
|---|
| DOI | Trouver le DOI : https://doi.org/10.1002/ejoc.200901140 |
|---|
| Auteur | Rechercher : Zhang, Xiaomo; Rechercher : Quan, Yiwu; Rechercher : Cui, Zhe1; Rechercher : Chen, Qingmin; Rechercher : Ding, Jianfu1; Rechercher : Lu, Jianping2 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
- Conseil national de recherches du Canada. Institut des sciences des microstructures du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Sujet | Optoelectronic properties; Oligomers; Amines; Fluorescence; Electrochemistry |
|---|
| Résumé | Two 3D monodisperse oligofluorenes with non-conjugated triphenylamine-based cores have been synthesized by Friedel–Crafts copolycondensation reaction. The oligomers, PF₃-TPA and PF₃-TPA₃, consist of three fluorene pentamer arms that are connected non-conjugately through a triphenylamine (TPA) and 1,3,5-tris(triphenylamino)benzene core (TPA₃), respectively, at the 9-position of the central fluorine of the pentafluorene arms. The coplanar structures of the cores and the linkages at the centre of the pentafluorene arms produced a 3D structure of oligomers. This specific structure efficiently retarded the crystallization tendencies of the pentafluorene arms and gave the materials completely amorphous morphological structures. Both oligomers emit deep-blue fluorescence with high efficiencies in thin films (Øpl–film = 67% for PF₃-TPA₃ and 86% for PF₃-TPA). The introduction of triphenylamine units into the core promoted the hole-injection ability while not obviously scarificing the electron- injection ability of the oligomers. The multi-layer devices ITO/PEDOT-PSS/PF₃-TPA₃ and PF₃-TPA/TPBI/LiF/Al were fabricated to investigate the electroluminescence (EL) properties of the two oligomers. Both oligomers showed a low turn-on voltage of 4 V. The luminances reached 1946 cd/m² at 7.5 V in the PF₃-TPA₃ device and 1055 cd/m² at 8 V in the PF₃-TPA device. The EL efficiencies at this luminance were 1.63 and 1.57 cd/A, respectively. |
|---|
| Date de publication | 2010 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro du CNRC | NRCC 52081 |
|---|
| Numéro NPARC | 15442964 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 0c936da9-0014-4e04-bb23-abc2e63e5d39 |
|---|
| Enregistrement créé | 2010-05-31 |
|---|
| Enregistrement modifié | 2020-04-17 |
|---|
