Optochemical sensor based on screenprinted fluorescent sensorspots surrounded by organic photodiodes for multianalyte detection

E. Kraker; B. Lamprecht; A. Haase; G. Jakopic; T. Abel; C. Konrad; S. Köstler; M. Tscherner; B. Stadlober; T. Mayr

doi:10.1117/12.859857

17 August 2010 Optochemical sensor based on screenprinted fluorescent sensorspots surrounded by organic photodiodes for multianalyte detection

E. Kraker, B. Lamprecht, A. Haase, G. Jakopic, T. Abel, C. Konrad, S. Köstler, M. Tscherner, B. Stadlober, T. Mayr

Author Affiliations +

Proceedings Volume 7779, Organic Semiconductors in Sensors and Bioelectronics III; 777904 (2010) https://doi.org/10.1117/12.859857
Event: SPIE Photonic Devices + Applications, 2010, San Diego, California, United States

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 ORMOCER^R 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.

Citation Download Citation

E. Kraker, B. Lamprecht, A. Haase, G. Jakopic, T. Abel, C. Konrad, S. Köstler, M. Tscherner, B. Stadlober, and T. Mayr "Optochemical sensor based on screenprinted fluorescent sensorspots surrounded by organic photodiodes for multianalyte detection", Proc. SPIE 7779, Organic Semiconductors in Sensors and Bioelectronics III, 777904 (17 August 2010); https://doi.org/10.1117/12.859857

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