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Proceedings Paper

Optochemical sensor based on screenprinted fluorescent sensorspots surrounded by organic photodiodes for multianalyte detection
Author(s): E. Kraker; B. Lamprecht; A. Haase; G. Jakopic; T. Abel; C. Konrad; S. Köstler; M. Tscherner; B. Stadlober; T. Mayr
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Paper Abstract

A compact, integrated photoluminescence based oxygen sensor, utilizing an organic light emitting device (OLED) as the light source and an organic photodiode (OPD) as the detection unit, is described. The detection system of the sensor array consists of an array of circular screen-printed fluorescent sensor spots surrounded by organic photodiodes as integrated fluorescence detectors. The OPD originates from the well-known Tang photodiode, consisting of a stacked layer of copper phthalocyanine (CuPc, p-type material) and perylene tetracarboxylic bisbenzimidazole (PTCBi, n-type material). An additional layer of tris-8-hydroxyquinolinatoaluminium (Alq3, n-type material) was inserted between the PTCBi layer and cathode. An ORMOCERR layer was used as encapsulation layer. For excitation an organic light emitting diode is used. The sensor spot and the detector are processed on the same flexible substrate. This approach not only simplifies the detection system by minimizing the numbers of required optical components - no optical filters have to be used for separating the excitation light and the luminescent emission-, but also has a large potential for low-cost sensor applications. The feasibility of the concept is demonstrated by an integrated oxygen sensor, indicating good performance. Sensor schemes for other chemical parameters are proposed.

Paper Details

Date Published: 17 August 2010
PDF: 7 pages
Proc. SPIE 7779, Organic Semiconductors in Sensors and Bioelectronics III, 777904 (17 August 2010); doi: 10.1117/12.859857
Show Author Affiliations
E. Kraker, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
B. Lamprecht, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
A. Haase, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
G. Jakopic, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
T. Abel, Technische Univ. Graz (Austria)
C. Konrad, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
S. Köstler, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
M. Tscherner, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
B. Stadlober, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
T. Mayr, Technische Univ. Graz (Austria)

Published in SPIE Proceedings Vol. 7779:
Organic Semiconductors in Sensors and Bioelectronics III
Ruth Shinar; Ioannis Kymissis, Editor(s)

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