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

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.
Inventors:
Issue Date:
OSTI Identifier:
1151826
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM) LANL
Patent Number(s):
8,823,259
Application Number:
13/886,517
Contract Number:
AC52-06NA25396
Research Org:
LANL (Los Alamos National Laboratory (LANL), Los Alamos, NM (United States))
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING