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Large Photoresponsivity in High‐Mobility Single‐Crystal Organic Field‐Effect Phototransistors
Author(s) -
MasTorrent Marta,
Hadley Peter,
Crivillers Núria,
Veciana Jaume,
Rovira Concepció
Publication year - 2006
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200500325
Subject(s) - tetrathiafulvalene , photocurrent , optoelectronics , materials science , charge carrier , field effect transistor , electron mobility , organic semiconductor , dark current , photon , photoconductivity , transistor , charge (physics) , photodetector , chemistry , optics , voltage , physics , molecule , organic chemistry , quantum mechanics
Photons control number of mobile charge carriers: Organic field‐effect transistors based on dithiophene‐tetrathiafulvalene (DT‐TTF) and dibenzo‐tetrathiafulvalene (DB‐TTF) show enhanced conductivity under illumination (see figure). A very high ratio of photocurrent to dark current of the order of ≈10 4 was observed for DT‐TTF due to the photogeneration of mobile charge carriers (holes). These materials have the potential to be employed as light sensors or optoelectronic memory devices.