Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3115794
Keywords
carrier mobility; dark conductivity; organic compounds; photoconductivity; phototransistors
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The authors reported organic phototransistors (PTs) with octadecyltrichlorosilane treated SiO2/Si substrate based on anthra[2,3-b]benzo[d]thiophene. The organic PTs show a high mobility of 0.4 cm(2) V-1 s(-1), a maximum photoresponsivity of about 1000 A/W, and photocurrent/dark-current ratio of around 800 under white light irradiation with 30 mu W/cm(2). The data are comparable with those of PTs based on amorphous silicon. Meanwhile, it is interesting to see that the devices show a high air-stable property and high photosensitivity via electric-field enhanced process. All these phenomena were attributed to the intrinsic optic-electronic property of the organic semiconductor and optic-electric field effect.
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