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The relationship of current transfer ratio and input light wavelengths in the organic photocoupler
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Figures

Image of FIG. 1.

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FIG. 1.

(a) The configuration of the photocoupler. (b) The corresponding measurement circuit.

Image of FIG. 2.

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FIG. 2.

(a) Absorbance of P3HT/PCBM and transmittance of glass/epoxy/glass. (b) The EL spectra of D1, D2, D3, and D4.

Image of FIG. 3.

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FIG. 3.

(a) characteristic, is the current through the PD, is the input current of OLEDs. Inset: The photocurrent (achieving from the standard silicon PD)— characteristic of four OLEDs. (b) CTR (defined as )—. Inset: (I) The CTR enlargement of D1. (II) The curve of photocurrent-time from the grating spectrograph (HITACHI F-4500) as input light.

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/content/aip/journal/apl/94/19/10.1063/1.3133349
2009-05-12
2014-04-17

Abstract

In this article we have fabricated an organic photocoupler with different wavelengths of organic light-emitting diodes as light source (input unit) and photodiode based on poly(3-hexylthiophene):1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)- as detector (output unit). The relationship between the current transfer ratio (CTR) and input light wavelengths was studied. The output current and CTR are increasing with the input light wavelengths decreasing from 624 to 470 nm, and the CTR value with 470 nm input wavelength is 3–12 times higher than that with other longer input wavelengths, indicating that the short wavelength input light generates photocurrent and CTR efficiently.

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Scitation: The relationship of current transfer ratio and input light wavelengths in the organic photocoupler
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/19/10.1063/1.3133349
10.1063/1.3133349
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