Carbon-containing cathodes for enhanced electron emission

Cao, Renyu; Pan, Lawrence; Vergara, German; Fox, Ciaran

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Title: Carbon-containing cathodes for enhanced electron emission

Abstract

A cathode has electropositive atoms directly bonded to a carbon-containing substrate. Preferably, the substrate comprises diamond or diamond-like (sp.sup.3) carbon, and the electropositive atoms are Cs. The cathode displays superior efficiency and durability. In one embodiment, the cathode has a negative electron affinity (NEA). The cathode can be used for field emission, thermionic emission, or photoemission. Upon exposure to air or oxygen, the cathode performance can be restored by annealing or other methods. Applications include detectors, electron multipliers, sensors, imaging systems, and displays, particularly flat panel displays.

Inventors:

Cao, Renyu ^[1]; Pan, Lawrence ^[2]; Vergara, German ^[3]; Fox, Ciaran ^[4]

Cupertino, CA
Pleasanton, CA
Madrid, ES
Los Altos, CA

Issue Date:: 2000-01-01

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

OSTI Identifier:: 873106

Patent Number(s):: 6091186

Assignee:: Board of Trustees of Leland Stanford Junior University (Palo Alto, CA); Sandia National Laboratories (Livermore, CA)

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J1/30 - Cold cathodes, e.g. field-emissive cathode
H01J2201/30446 - characterised by the emitter material
H01J2201/32 - Secondary emission electrodes
H01J2201/342 - Cathodes

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DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: carbon-containing; cathodes; enhanced; electron; emission; cathode; electropositive; atoms; directly; bonded; substrate; preferably; comprises; diamond; diamond-like; sp; carbon; cs; displays; superior; efficiency; durability; embodiment; negative; affinity; nea; field; thermionic; photoemission; exposure; air; oxygen; performance; restored; annealing; methods; applications; detectors; multipliers; sensors; imaging; systems; particularly; flat; panel; substrate comprises; electron emission; field emission; flat panel; electron affinity; panel displays; panel display; negative electron; thermionic emission; imaging systems; electron multipliers; electron multiplier; electropositive atoms; containing substrate; /313/257/445/

Citation Formats


                    Cao, Renyu, Pan, Lawrence, Vergara, German, and Fox, Ciaran. Carbon-containing cathodes for enhanced electron emission.  United States: N. p., 2000. 
        Web.

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                    Cao, Renyu, Pan, Lawrence, Vergara, German, & Fox, Ciaran. Carbon-containing cathodes for enhanced electron emission.  United States.

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                    Cao, Renyu, Pan, Lawrence, Vergara, German, and Fox, Ciaran. Sat .  
        "Carbon-containing cathodes for enhanced electron emission".  United States.  https://www.osti.gov/servlets/purl/873106.

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@article{osti_873106,

  title        = {Carbon-containing cathodes for enhanced electron emission},

  author       = {Cao, Renyu and Pan, Lawrence and Vergara, German and Fox, Ciaran},

  abstractNote = {A cathode has electropositive atoms directly bonded to a carbon-containing substrate. Preferably, the substrate comprises diamond or diamond-like (sp.sup.3) carbon, and the electropositive atoms are Cs. The cathode displays superior efficiency and durability. In one embodiment, the cathode has a negative electron affinity (NEA). The cathode can be used for field emission, thermionic emission, or photoemission. Upon exposure to air or oxygen, the cathode performance can be restored by annealing or other methods. Applications include detectors, electron multipliers, sensors, imaging systems, and displays, particularly flat panel displays.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2000},

  month        = {1}

}

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Works referenced in this record:

Properties of metal/diamond interfaces and effects of oxygen adsorbed onto diamond surface
journal, March 1991

Mori, Yusuke; Kawarada, Hiroshi; Hiraki, Akio
Applied Physics Letters, Vol. 58, Issue 9
https://doi.org/10.1063/1.104484

Photoelectron Emission from the Cesiated Diamond (110) Surface
journal, January 1995

Fox, C. A.; Kelly, M. A.; Hagstrom, S. B.
MRS Proceedings, Vol. 416
https://doi.org/10.1557/PROC-416-449

The diamond surface: atomic and electronic structure
journal, January 1986

Pate, B. B.
Surface Science, Vol. 165, Issue 1
https://doi.org/10.1016/0039-6028(86)90665-5

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Title: Carbon-containing cathodes for enhanced electron emission

Abstract

Citation Formats

Properties of metal/diamond interfaces and effects of oxygen adsorbed onto diamond surface journal, March 1991

Photoelectron Emission from the Cesiated Diamond (110) Surface journal, January 1995

The diamond surface: atomic and electronic structure journal, January 1986

Properties of metal/diamond interfaces and effects of oxygen adsorbed onto diamond surface
journal, March 1991

Photoelectron Emission from the Cesiated Diamond (110) Surface
journal, January 1995

The diamond surface: atomic and electronic structure
journal, January 1986