Narrow band green organic photodiodes for imaging

Lyons, Dani M., Armin, Ardalan, Stolterfoht, Martin, Nagiri, Ravi C. R., Jansen-van Vuuren, Ross D., Pal, Bhola N., Burn, Paul L., Lo, Shih-Chun and Meredith, Paul (2014) Narrow band green organic photodiodes for imaging. Organic Electronics, 15 11: 2903-2911. doi:10.1016/j.orgel.2014.08.015


Author Lyons, Dani M.
Armin, Ardalan
Stolterfoht, Martin
Nagiri, Ravi C. R.
Jansen-van Vuuren, Ross D.
Pal, Bhola N.
Burn, Paul L.
Lo, Shih-Chun
Meredith, Paul
Title Narrow band green organic photodiodes for imaging
Journal name Organic Electronics   Check publisher's open access policy
ISSN 1566-1199
1878-5530
Publication date 2014-10-31
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.orgel.2014.08.015
Open Access Status Not yet assessed
Volume 15
Issue 11
Start page 2903
End page 2911
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 2502 Biomaterials
2504 Electronic, Optical and Magnetic Materials
2505 Materials Chemistry
2208 Electrical and Electronic Engineering
1600 Chemistry
3104 Condensed Matter Physics
Abstract Accurate color reproduction using image sensors requires four narrow-band absorbing photodetectors (blue, green, yellow and red). Current photodetectors use a broadband photodetector in combination with color filters, which generally do not have sufficient wavelength discrimination for illuminant independent color recognition. We have developed a green-sensitive organic photodetector, in which color selection is achieved using a narrow-absorbing ketocyanine chromophore, coupled with a low finesse electro-optical cavity inducing further spectral narrowing. The optimized device contained a bulk heterojunction light-absorbing layer comprised of a ketocyanine dye blended with [6,6]phenyl-C-61-butyric acid methyl ester. The photodetector had a response full width at half maximum of 80 nm centered around 525 nm, and an external quantum efficiency of 15% at -1.0 V, which is the highest so far reported for a narrow band green-absorbing organic photodetector. The performance of this detector is sufficient to meet the specifications required by machine vision systems. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.
Formatted abstract
Accurate color reproduction using image sensors requires four narrow-band absorbing photodetectors (blue, green, yellow and red). Current photodetectors use a broadband photodetector in combination with color filters, which generally do not have sufficient wavelength discrimination for illuminant independent color recognition. We have developed a green-sensitive organic photodetector, in which color selection is achieved using a narrow-absorbing ketocyanine chromophore, coupled with a low finesse electro-optical cavity inducing further spectral narrowing. The optimized device contained a bulk heterojunction light-absorbing layer comprised of a ketocyanine dye blended with [6,6]-phenyl-C61-butyric acid methyl ester. The photodetector had a response full width at half maximum of 80 nm centered around 525 nm, and an external quantum efficiency of 15% at −1.0 V, which is the highest so far reported for a narrow band green-absorbing organic photodetector. The performance of this detector is sufficient to meet the specifications required by machine vision systems.
Keyword Optical modeling
Organic photodiode
Narrow absorber
Ketocyanine
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID ARC DP120103726
Institutional Status UQ

 
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