Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4816502
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We report green-sensitive organic photodetectors consisting of a bulk heterojunction blend of N,N-dimethylquinacridone and dicyanovinyl-terthiophene. Devices incorporating a triphenylamine derivative-based electron blocking layer and a molybdenum oxide hole extracting layer lead to significantly low dark currents (J(d)) similar to 6.41 nA/cm(2) at -3 V and high external quantum efficiency of 55.2% at 540 nm wavelength with a narrow full width at half maximum of 146 nm, which is likely to be applicable for full colour organic image sensors. Based on the interfacial energy barrier and temperature dependent current-voltage characteristics, possible origins of the reverse J(d) of devices are further described. (C) 2013 AIP Publishing LLC.
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