Organic Single-Crystal Transistor with Unique Photo Responses and Its Application as Light-Stimulated Synaptic Devices

ACS Applied Materials & Interfaces
Xiaosong WuWeiguo Huang

Abstract

Tremendous progress has been achieved on organic transistor-based photodetectors; however, because of the nonpositive correlation relationship between the photo/dark current ratio (P) and the gate voltage, the claimed best P, R (photoresponsivity), and D* (detectivity) can hardly be obtained simultaneously at a given gate voltage, which severely compromises the device performance. Here, a light and voltage dually gated transistor based on an organic semiconducting single crystal of 2,6-dithienylanthracene (DTAnt) is developed. Attributing to its very low on/off ratio in the dark and the remarkable increment of mobilities under illumination, this phototransistor shows good performance with a P of 3.83 × 103, R of 1.32 A W-1, and D* of 1.94 × 1012 Jones achieved simultaneously at Vg = -100 V. Besides, the good reversibility and repeatability of its light-responsive behavior allows for the construction of an artificial photonic neuromorphic device with demonstrated synaptic functions, including excitatory postsynaptic current, short/long-term memory , and pair-pulse facilitation/depression.

References

Jul 18, 2012·Proceedings of the National Academy of Sciences of the United States of America·Corinna RaimondoPaolo Samorì
Oct 21, 2014·Advanced Materials·Youngbin LeeJeong Ho Cho
Mar 7, 2018·ACS Applied Materials & Interfaces·Fangxu YangWenping Hu
Jun 8, 2018·ACS Applied Materials & Interfaces·Shilei DaiJia Huang
Jun 27, 2018·ACS Nano·Ivan Sanchez EsquedaChongwu Zhou
Jul 25, 2018·Advanced Materials·Xiaotao ZhangWenping Hu
Sep 13, 2018·ACS Applied Materials & Interfaces·Shuchao QinFengqiu Wang
Dec 28, 2018·Advanced Materials·Jinyu LiuWenping Hu

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