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We report on the preparation and characterization of a highly sensitive organic photodiode for the entire visible part of the spectrum. The photodiode is based on a small molecule heterojunction layer of zinc phthalocyanine (ZnPC) and fullerene C 60 and is prepared by multistep vacuum deposition technique. Investigation is performed under different illumination conditions, from spectrally broad to narrow line, cw and pulsed, to determine linearity of operation, responsivity, quantum efficiency, dark current, and detectivity. The experimental results in combination with a simple device stack favor ZnPC:C 60 as active layer in organic photodiodes, e.g., for opto-electronic sensor systems.

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Vibrator seismic sources are operated concurrently to reduce the time required for acquiring the data for a particular seismic survey. Separate seismic signals are produced for each of the concurrently operated vibrator seismic sources."--SAC 4,910,715 43.40.Ph MARINE SEISMIC STREAMER CABLE