High-Photoresponsivity Transistors Based on Small-Molecule Organic Semiconductors
ACS APPLIED ELECTRONIC MATERIALS(2022)
Abstract
We investigate the viability of 2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (diF-TES ADT) as a photosensor and show that there is a direct correlation between the absorption spectrum of the material and the magnitude of the resulting drain current in a field-effect transistor device made from it. We show that the diF-TES ADT device exhibits very high photosensitivity and photoresponsivity for green and blue light. We also propose a hybrid device structure that leverages the high absorptivities of two organic semiconductors to make a sandwich device with high phototransistor metrics across all wavelengths of visible light.
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Key words
diF-TES ADT, photocurrent, photosensitivity, photoresponsivity, photovoltaic effects, photoconductive effects
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