Charge modulation spectroscopy is an electro-optical spectroscopy technique tool.[1] It is used to study the charge carrier behavior of organic field-effect transistors. It measures the charge introduced optical transmission variation[2][3] by directly probing the accumulation charge at the burning interface of semiconductor and dielectric layer[4] where the conduction channel forms.
Block diagram of charge modulation spectroscopy setup. Here the photo diode measures the transmission. A direct current plus alternating current signal is applied to the organic field-effect transistor, the AC will be as the reference frequency for the Lock-in Amplifier.
^Caironi, Mario; Bird, Matt; Fazzi, Daniele; Chen, Zhihua; Di Pietro, Riccardo; Newman, Christopher; Facchetti, Antonio; Sirringhaus, Henning (9 September 2011). "Very Low Degree of Energetic Disorder as the Origin of High Mobility in an n-channel Polymer Semiconductor". Advanced Functional Materials. 21 (17): 3371–3381. doi:10.1002/adfm.201100592. S2CID 95644182.
^Sirringhaus, H.; Brown, P. J.; Friend, R. H.; Nielsen, M. M.; Bechgaard, K.; Langeveld-Voss, B. M. W.; Spiering, A. J. H.; Janssen, R. A. J.; Meijer, E. W.; Herwig, P.; de Leeuw, D. M. (October 1999). "Two-dimensional charge transport in self-organized, high-mobility conjugated polymers". Nature. 401 (6754): 685–688. Bibcode:1999Natur.401..685S. doi:10.1038/44359. S2CID 4387286.
^Brown, Peter J.; Sirringhaus, Henning; Harrison, Mark; Shkunov, Maxim; Friend, Richard H. (12 March 2001). "Optical spectroscopy of field-induced charge in self-organized high mobility poly(3-hexylthiophene)". Physical Review B. 63 (12): 125204. Bibcode:2001PhRvB..63l5204B. doi:10.1103/physrevb.63.125204.
^Large area and flexible electronics. Wiley-VCH. 2015-05-04. ISBN 9783527336395.
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