Integrated fluorescence sensor based on ring-shaped organic photodiodes

Abstract We demonstrate a novel sensor type, which is based on the monolithic integration of luminescent optical sensor spots together with ring-shaped thin-film organic photodiodes on one substrate. The organic photodiodes serve as integrated fluorescence detectors, simplifying the detection system by minimizing the number of required optical components. The proposed concept enables filter-less discrimination between excitation light and generated fluorescence light. The functionality of the concept is demonstrated by an integrated oxygen sensor, exhibiting excellent performance. The sensor spots are excited by an assembled organic light emitting diode. The integrated optical sensor platform is suitable for the parallel detection of multiple parameters. Sensor schemes for the analytical parameters carbon dioxide, temperature and ammonia, are proposed. (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)