Journal article
Bipolar redox behaviour, field-effect mobility and transistor switching of the low-molecular azo glass AZOPD
Publication Details
Authors: | Arlt, M.; Scheffler, A.; Suske, I.; Eschner, M.; Saragi, T.; Salbeck, J.; Fuhrmann-Lieker, T. |
Publication year: | 2010 |
Journal: | Physical Chemistry Chemical Physics |
Pages range : | 13828-13834 |
Volume number: | 12 |
ISSN: | 1463-9076 |
eISSN: | 1463-9084 |
Abstract
We present electrochemical and spectroelectrochemical data for the bipolar azo compound N,N'-diphenyl-N,N'-bis[4-(phenylazo)phenyl]-4,4'diaminobiphenyl (AZOPD) demonstrating reversible bipolar redox behaviour with a bandgap of 2.1 eV. The reduced species formed upon two-electron transfer can be described as bis(radical anion) as was confirmed by comparison witha reference compound with only one azo chromophore. Hole and electron transport behaviour in amorphous films was demonstrated by the fabrication of organic field-effect transistors using gold and magnesium contacts, respectively. The transistors are sensitive to light due to E-Z photoisomerization.
We present electrochemical and spectroelectrochemical data for the bipolar azo compound N,N'-diphenyl-N,N'-bis[4-(phenylazo)phenyl]-4,4'diaminobiphenyl (AZOPD) demonstrating reversible bipolar redox behaviour with a bandgap of 2.1 eV. The reduced species formed upon two-electron transfer can be described as bis(radical anion) as was confirmed by comparison witha reference compound with only one azo chromophore. Hole and electron transport behaviour in amorphous films was demonstrated by the fabrication of organic field-effect transistors using gold and magnesium contacts, respectively. The transistors are sensitive to light due to E-Z photoisomerization.
