Synthesis and characterization of spiro(adamantane-2,9′-fluorene)-based triaryldiamines: thermally stable hole-transporting materials
| Autor: | Wen-Jian Shen, Ching-Fong Shu, Ching-Hsin Chen, Kavitha Jakka |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Mechanical Engineering
Adamantane Metals and Alloys Lithium fluoride Chemical vapor deposition Fluorene Electroluminescence Condensed Matter Physics Electronic Optical and Magnetic Materials Amorphous solid chemistry.chemical_compound Crystallography chemistry Mechanics of Materials Materials Chemistry OLED Organic chemistry Glass transition |
| Zdroj: | Synthetic Metals. 143:215-220 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2003.12.005 |
| Popis: | New triaryldiamines, Adm-TPD and Adm-NPD, which contain a spiro(adamantane-2,9′-fluorene) core, have been synthesized and characterized. We believe that because of the presence of the rigid spiro-fluorene core, these triaryldiamines exhibit higher glass transition temperatures and have a less tendency to crystallize relative to their biphenyl analogs. Additionally, electrochemical studies showed that the planarity of the fluorene core leads to lower ionization potentials and greater degrees of π conjugation between the two amino groups. AFM measurements demonstrated that high-quality amorphous films of Adm-NPD with good morphological stability were prepared by vapor deposition. Electroluminescent devices using Adm-NPD as a hole-transporting layer—i.e., having the configuration ITO/Adm-NPD/Alq 3 /LiF/Al—emit a bright green light that is characteristic of Alq 3 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect