Journal
ORGANIC ELECTRONICS
Volume 18, Issue -, Pages 113-117Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2015.01.021
Keywords
Photodetector; Photoconductor; Phototransistor; Organic semiconductor; diF-TES-ADT
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2014M1A3A3A02034707, 2012-047047]
- Space Core Technology Development Program
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In this report, we demonstrate a photoconductive device based on difluorinated 5,11-bis(triethylsilylethynyl) anthradithiophene (diF-TES-ADT). The light intensity dependences of the transient photocurrent combined with theoretical analyses clearly show that a simple device architecture consisting of diF-TES-ADT and two Au electrodes patterned in parallel forms an efficient, trap-limited, gain-generating photoconductive device, resulting in high responsivity up to approximately 500 A/W. Moreover, the efficient gain-generating nature of diF-TES-ADT enables efficient tuning of the charge carrier density in the channel region, resulting in unprecedentedly sensitive phototransistor performance with high current modulation exceeding 10(6) as well as hysteresis-free threshold voltage shifts. (C) 2015 Published by Elsevier B.V.
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