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High detectivity squaraine-based near infrared photodetector with dark current
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/content/aip/journal/apl/98/7/10.1063/1.3553767
2011-02-15
2014-10-01

Abstract

We demonstrate an organic photodetector showing high detectivity at a wavelength of 700 nm, based on squaraine/phenyl--butyric-acid-methyl-ester bulk-heterojunction active material. This result is achieved by suppressing the device dark currents while simultaneously preserving its external quantum efficiency, as high as 15% at 700 nm. To this aim, a thin cross-linked film based on poly[2-methoxy-5-(-ethyl-hexyloxy)-1,4-phenylene-vinylene] is exploited to suppress electron injection from the device anode into the organic blend, thus reducing the dark currents by a factor of 30, to the extremely low value of . Also, the detector bandwidth is unaffected by the introduction of a blocking layer.

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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High detectivity squaraine-based near infrared photodetector with nA/cm2 dark current
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/7/10.1063/1.3553767
10.1063/1.3553767
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