Low-workfunction photocathodes based on acetylide compounds
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United States of America Patent
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May 20, 2014
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Nov 29, 2012
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Nov 29, 2012
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Abstract
A low-workfunction photocathode includes a photoemissive material employed as a coating on the photocathode. The photoemissive material includes AnMC2, where A is a first metal element, the first element is an alkali metal, an alkali-earth element or the element Al; n is an integer that is 0, 1, 2, 3 or 4; M is a second metal element, the second metal element is a transition metal or a metal stand-in; and C2 is the acetylide ion C22−. The photoemissive material includes a crystalline structure or non-crystalline structure of rod-like or curvy 1-dimensional polymeric substructures with MC2 repeating units embedded in a matrix of A.
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