Side-group engineering: The influence of norbornadienyl substituents on the properties of ethynylated pentacene and tetraazapentacene
| Autor: | Manuel Schaffroth, Yana Vaynzof, Frank Rominger, Michael Porz, Uwe H. F. Bunz, Andreas Leineweber, Fabian Paulus |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Electron mobility
Materials science Substituent 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials Pentacene chemistry.chemical_compound chemistry Atom Materials Chemistry Side chain Organic chemistry Charge carrier Electrical and Electronic Engineering 0210 nano-technology Pendant group Derivative (chemistry) |
| Zdroj: | Organic Electronics. 33:102-109 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2016.02.042 |
| Popis: | The chemical modifications of 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-PEN) and 6,13-bis(triisopropylsilylethynyl)-5,7,12,14-tetraazapentacene (TIPS-TAP) by introduction of a large norbornadienyl substituent at the silyl atom of the side chain were examined and their effect on the charge transport properties in organic field-effect transistors (OFETs) was investigated. While the introduction of the norbornadienyl substituent resulted in only small changes in the crystallographic packing of these materials and did not affect the optical and electronic properties, the effect on the charge carrier mobility is significant. The hole mobility for the norbornadienyl substituted pentacene (Nor-PEN) is increased compared to similarly prepared TIPS-PEN devices, reaching up to 0.75 cm2/Vs. On the other hand, the electron mobility of the tetraaza derivative (Nor-TAP) is reduced by an order of magnitude compared to its parent TIPS-TAP. The strong effect of the norbornadienyl substitution on the charge carrier mobilities can be explained by the calculation of the transfer integrals and the microstructure of the resulting films of the Nor-derivatives. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect