Chemistry Seminar: Vacuum UV Responsive CMOS Imaging Detectors
Vacuum UV Responsive CMOS Imaging Detectors by Printing an Inorganic Phosphor Optical Filter Assembly
Dr. Scott Williams
Director
Materials Science and Engineering MS Program, RIT
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Dr. Williams will present on a novel process involving functional printing onto CMOS detector arrays.
Abstract:Astronomical imaging achievements are recently aided by continual improvements in CMOS and CCD detector array performance. Since their invention in the 1970s, imaging arrays have undergone significant improvements to provide a better spectral sensitivity range. In the visible region, these imaging arrays exhibit quantum efficiencies near 100% with very little noise or dark current. Deep depletion CCDs utilize an increase in silicon absorption depth to increase sensitivity at near IR wavelengths. These imaging detector technologies are, however, substantially less sensitive in the UV/VUV region because of the shallow penetration depth of UV photons. Lumogen, an organic fluorophore, is currently CVD deposited directly on CMOS detectors to extend the spectral sensitivity into VUV spectral range. Once deployed, Lumogen coatings tend to migrate under harsh space environmental conditions that unpredictably degrade detector performance. A new approach will be presented that incorporates a high quantum yield inorganic phosphor into a VUV transparent matrix composition that is printed directly on the CMOS surface providing both enhanced sensitivity and protection.
Speaker Bio:
Professor Williams is currently a Professor of Inorganic Chemistry in the School of Chemistry and Materials Science at RIT. The Williams Group develops novel synthetic approaches to create printable inks that deposit conductive, semiconductive or resistive elements on a variety of form factors using production-scale print processes. Metal-oxide and metal organic decomposition systems (MOD) inks and structures are of particular interest in collaboration with the AMPrint Center.
Intended Audience:
Undergraduates, graduates, and experts. Those with interest in the topic.
Event Snapshot
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This is an RIT Only Event
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No