Blue Light Emission from a Fluorene-Carbazole-Fluorene Trimer Incorporated as the Side Chain into a Polynorbornene
✍ Scribed by Norredine Zaami; Christian Slugovc; Alexander Pogantsch; Franz Stelzer
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 171 KB
- Volume
- 205
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Summary: A well defined blue electroluminescent fluorene‐carbazol‐fluorene trimer 3,6‐bis‐(9,9‐dihexyl‐9__H__‐fluoren‐3‐yl)‐9‐alkyl‐9__H__‐carbazole was synthesized using a Suzuki type cross coupling reaction as the key step. A way to attach this chromophore to a norbornene was developed and the resulting electroactive monomer was polymerised using the “3^rd^ generation Grubbs catalyst” (N,N‐bis(mesityl) 4,5‐dihydroimidazol‐2‐ylidene)(3‐bromo‐pyridine)~2~(Cl)~2~RuCHPh), yielding an amorphous polymer with a narrow molecular weight distribution, which was used to build a light‐emitting diode exhibiting electroluminescence peaking at 410 nm.
Incorporation of the fluorene‐carbazol‐fluorene trimer as the emissive layer in an ITO/PEDOT:PSS/emitter/Ca/Al light emitting device.
magnified imageIncorporation of the fluorene‐carbazol‐fluorene trimer as the emissive layer in an ITO/PEDOT:PSS/emitter/Ca/Al light emitting device.