14 September 2010 Organic based semiconductor device structures for detecting ionizing radiation in a space environment
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Abstract
There is a wide spectrum of ionizing radiation present in the space environment. The Linear Energy Transfer (LET) of the radiation determines the nature of damage to materials on a microscopic scale. Microdosimetry describes the dependency of this material damage as a function of particle LET and quality. This is key to understanding the effects of radiation on both biological and electronic systems. An ideal microdosimetric detector would physically be the size of individual particle events. If it were to be useful biologically as well, it should be organic and have a density close to one. This would make the device "tissue equivalent." In the past we developed inter-digitated devices that met these criteria. Now we present a solid state tissue equivalent detector using organic semiconductor as the active region. Many of the difficulties associated with the original inter-digitated devices are overcome by the new structures. We report on the material problems associated with the organic materials used, and the solutions found. The device responses to radiation types are presented. Semiconductor processing techniques similar to those used when producing high speed photon and x-ray detectors are employed.
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Michael Bardash, "Organic based semiconductor device structures for detecting ionizing radiation in a space environment", Proc. SPIE 7817, Nanophotonics and Macrophotonics for Space Environments IV, 781706 (14 September 2010); doi: 10.1117/12.861628; https://doi.org/10.1117/12.861628
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