Bipolar redox behaviour, field-effect mobility and transistor switching of the low-molecular azo glass AZOPD.
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 with a 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.
Arlt
Michael
M
Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, D-34109 Kassel, Germany.
Scheffler
Ayna
A
Suske
Irina
I
Eschner
Michael
M
Saragi
Tobat P I
TP
Salbeck
Josef
J
Fuhrmann-Lieker
Thomas
T