2016
DOI: 10.1002/bkcs.11030
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Spectral Responses of Light‐Emitting Diodes as a Photodiode and Their Applications in Optical Measurements

Abstract: Spectral responses of four light‐emitting diodes (LEDs) were investigated because their uses as a photodiode are growing these days. An LED showed reasonable sensitivity to shorter wavelengths which the LED emits. Their spectral response ranges are same or relatively wider than their emission range. In addition, LEDs were used as detectors to analyze test dyes with absorbance measurement technique or with fluorescence measurement technique. Absolute noise level of 0.0001 absorbance unit was observed with the b… Show more

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Cited by 10 publications
(10 citation statements)
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“…However, according to Figure B, a green LED based receiver is not able to detect the green color from a transmitter. This behavior has already been reported in literature . According to Figure B,C, green and blue LEDs have limitations when used as receivers.…”
Section: Resultssupporting
confidence: 83%
See 3 more Smart Citations
“…However, according to Figure B, a green LED based receiver is not able to detect the green color from a transmitter. This behavior has already been reported in literature . According to Figure B,C, green and blue LEDs have limitations when used as receivers.…”
Section: Resultssupporting
confidence: 83%
“…On the other hand, higher frequencies LEDs, such as the blue LED, tend to be less sensitive to other frequencies. Figure C also evidences a common LED property, which has been empirically studied only in a few works : LEDs are able to detect frequencies equal to and above to the frequency it emits. Practically, all LEDs present the same behavior.…”
Section: Resultsmentioning
confidence: 79%
See 2 more Smart Citations
“…Pairing two properly selected LEDs, one for emission and one for detection (paired emitter detector diode (PEDD)), enhances selectivity and enables us to prepare a detector dedicated for some specific determinations, where optical filters can be eliminated. Such systems can be employed for analytical purposes, for example, for phosphate determination (Bui and Hauser 2013 ; Fiedoruk et al 2014 ; O’Toole et al 2007 ; Saetear et al 2013 ; Shin et al 2016 ).…”
Section: Introductionmentioning
confidence: 99%