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A near infrared organic photodiode with gain at low bias voltage
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Figures

Image of FIG. 1.

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FIG. 1.

Diode current density-voltage characteristic on a linear scale and log scale (inset).

Image of FIG. 2.

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FIG. 2.

Photocurrent gain as a function of wavelength at the reverse bias voltages indicated.

Image of FIG. 3.

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FIG. 3.

Optical absorbance of (inset) as a thin film (50 nm, solid line, left vertical axis) and in a dilute chlorobenzene solution (dashed line, right vertical axis).

Image of FIG. 4.

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FIG. 4.

Gain at 1000 nm as a function of reverse bias.

Image of FIG. 5.

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FIG. 5.

Normalized gain at 2 V (open circles) and 8 V (crosses) reverse bias as a function of frequency.

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/content/aip/journal/apl/95/26/10.1063/1.3279133
2009-12-28
2014-04-25

Abstract

We demonstrate an organic photodiode with near infrared optical response out to about 1100 nm with a gain of at 1000 nm under 5 V reverse bias. The diodes employ a soluble naphthalocyanine with a peak absorption coefficient of at 1000 nm. In contrast to most organic photodiodes, no exciton dissociating material is used. At zero bias, the diodes are inefficient with an external quantum efficiency of . In reverse bias, large gain occurs and is linear with bias voltage above 4 V. The observed gain is consistent with a photoconductive gain mechanism.

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Scitation: A near infrared organic photodiode with gain at low bias voltage
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/26/10.1063/1.3279133
10.1063/1.3279133
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