Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3089574
Keywords
carrier density; dark conductivity; organic compounds; photoconductivity; thin film transistors
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Funding
- Ministry of Commerce, Industry and Energy of Korean government
- Korea Evaluation Institute of Industrial Technology (KEIT) [10030099-2009-13] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We have studied the light intensity dependence of drain current under illumination for the organic thin-film transistor using 6, 13-bis (pentylphenylethynyl)pentacene, having photosensitivity of up to 10(7). The carrier concentration in the channel could be achieved by comparing the currents at dark induced by gate potential and those generated under illumination at zero gate voltage. It increases with illumination intensity with a power law of 0.61, suggesting that the bimolecular recombination is the dominant one during the light illumination, resulting in no photocurrent at high gate potential.
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