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Proceedings Paper

Integrated organic optical sensor arrays based on ring-shaped organic photodiodes
Author(s): Martin Sagmeister; Bernhard Lamprecht; Elke Kraker; Anja Haase; Georg Jakopic; Stefan Köstler; Harald Ditlbacher; Nicole Galler; Tobias Abel; Torsten Mayr
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Paper Abstract

We present an integrated optical sensor platform suitable for the parallel detection of multiple parameters in an array format. This sensor technology combines fluorescent sensor layers with ring-shaped thin-film organic photodiodes (OPDs), serving as integrated fluorescence detectors. The sensing layers are deposited by screen-printing on the upper side of a PET substrate, which is exposed to an analyte, whereas the ring-shaped photodiodes are monolithically integrated, by vapour phase deposition, on the backside of the transparent substrate, in correct alignment to the sensing layers. The monolithic integration of sensor layers and detectors on one common substrate as well as the special ring shaped form of the photodiodes guarantees that a maximum of the fluorescent light emitted from the sensor layers is collected. A key advantage of the above described sensor geometry is the straightforward potential to realise sensor arrays for the parallel detection of multiple parameters: different sensor spots are illuminated by commercial LEDs or alternatively with one large area OLED, and are read-out by individual integrated organic photodiodes, surrounding the respective sensor layers. Three different sensing principles including absorption, fluorescence and surface plasmon resonance can be applied in the same basic sensor platform. The functionality of the concept is demonstrated by an integrated oxygen sensor. Sensor schemes for the analytical parameters carbon dioxide, temperature and ammonia, are proposed. Efficient front end electronics enabling intensity and time domain detection of sensor signals for the testing and characterisation of the integrated sensor devices have been developed.

Paper Details

Date Published: 7 September 2011
PDF: 6 pages
Proc. SPIE 8118, Organic Semiconductors in Sensors and Bioelectronics IV, 811805 (7 September 2011); doi: 10.1117/12.893497
Show Author Affiliations
Martin Sagmeister, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Bernhard Lamprecht, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Elke Kraker, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Anja Haase, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Georg Jakopic, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Stefan Köstler, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Harald Ditlbacher, Karl-Franzens-Univ. Graz (Austria)
Nicole Galler, Karl-Franzens-Univ. Graz (Austria)
Tobias Abel, Technische Univ. Graz (Austria)
Torsten Mayr, Technische Univ. Graz (Austria)

Published in SPIE Proceedings Vol. 8118:
Organic Semiconductors in Sensors and Bioelectronics IV
Ruth Shinar; Ioannis Kymissis, Editor(s)

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