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Title: Graphene shield enhanced photocathodes and methods for making the same

Patent ·
OSTI ID:1151826

Disclosed are graphene shield enhanced photocathodes, such as high QE photocathodes. In certain embodiments, a monolayer graphene shield membrane ruggedizes a high quantum efficiency photoemission electron source by protecting a photosensitive film of the photocathode, extending operational lifetime and simplifying its integration in practical electron sources. In certain embodiments of the disclosed graphene shield enhanced photocathodes, the graphene serves as a transparent shield that does not inhibit photon or electron transmission but isolates the photosensitive film of the photocathode from reactive gas species, preventing contamination and yielding longer lifetime.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-06NA25396
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Number(s):
8,823,259
Application Number:
13/886,517
OSTI ID:
1151826
Country of Publication:
United States
Language:
English

References (4)

Bialkaline photocathode having increased spectral sensitivity and method of manufacturing same patent December 1983
Ion barrier membrane for use in a vacuum tube using electron multiplying, an electron multiplying structure for use in a vacuum tube using electron multiplying as well as a vacuum tube using electron multiplying provided with such an electron multiplying structure patent June 2013
Synthesis of Graphene Sheets and Nanoparticle Composites Comprising Same patent-application August 2011
Fabrication of Single-Crystalline Graphene Arrays patent-application April 2012

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