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Class Information
Number: 257/10
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Thin active physical layer which is (1) an active potential well layer thin enough to establish discrete quantum energy levels or (2) an active barrier layer thin enough to permit quantum mechanical tunneling or (3) an active layer thin enough to permit carrier transmission with substantially no scattering (e.g., superlattice quantum well, or ballistic transport device) > Low workfunction layer for electron emission (e.g., photocathode electron emissive layer)
Description: Subject matter wherein a layer of material from which electrons are emitted with less input energy than that necessary to emit them from adjacent material is provided.

Sub-classes under this class:

Class Number Class Name Patents
257/11 Combined with a heterojunction involving a iii-v compound 213

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8692226 Materials and configurations of a field emission device Apr. 8, 2014
8581228 Corner cube enhanced photocathode Nov. 12, 2013
8569740 High efficiency thermoelectric materials and devices Oct. 29, 2013
8547013 Organic EL display device with a color converting layer Oct. 1, 2013
8536564 Integrated field emission array for ion desorption Sep. 17, 2013
8513662 Semiconductor device and display apparatus Aug. 20, 2013
8507890 Photoconversion device with enhanced photon absorption Aug. 13, 2013
8492744 Semiconducting microcavity and microchannel plasma devices Jul. 23, 2013
8440994 Nanotube array electronic and opto-electronic devices May. 14, 2013
8436332 Electron emission element and imaging device having the same May. 7, 2013
8405298 Large emission area light-emitting devices Mar. 26, 2013
8394651 Auger rate suppression in confined structures Mar. 12, 2013
8319265 Semiconductor device with improved common source arrangement for adjacent non-volatile memory cells Nov. 27, 2012
8269210 Cathode assembly containing an ultraviolet light-blocking dielectric layer Sep. 18, 2012
8232560 Light-emitting diode in semiconductor material Jul. 31, 2012
8198106 Dense array of field emitters using vertical ballasting structures Jun. 12, 2012
8188456 Thermionic electron emitters/collectors have a doped diamond layer with variable doping concentrations May. 29, 2012
8164069 Luminous body, electron beam detector using the same, scanning electron microscope, and mass analysis device Apr. 24, 2012
8138663 Light emitting device and method of manufacturing the same Mar. 20, 2012
8129710 Plasmon enhanced nanowire light emitting diode Mar. 6, 2012
8120008 Carbon-nanotube based opto-electric device Feb. 21, 2012
8076701 Large scale patterned growth of aligned one-dimensional nanostructures Dec. 13, 2011
8072134 Light-emitting devices Dec. 6, 2011
8017413 Field emission array having carbon microstructure and method of manufacturing the same Sep. 13, 2011
8017176 Robust activation method for negative electron affinity photocathodes Sep. 13, 2011
8018134 Light source, optical pickup, and electronic apparatus Sep. 13, 2011
8013321 Composite comprising array of needle-like crystal, method for producing the same, photovoltaic conversion element, light emitting element, and capacitor Sep. 6, 2011
8003884 Photovoltaic device and method for preparing the same Aug. 23, 2011
7977761 Controlled growth of a nanostructure on a substrate, and electron emission devices based on the same Jul. 12, 2011
7915641 Terahertz electromagnetic wave radiation element and its manufacturing method Mar. 29, 2011
7910895 Luminous body, electron beam detector using the same, scanning electron microscope, and mass analysis device Mar. 22, 2011
7902737 Light emission device with enhanced image luminance and display having the same Mar. 8, 2011
7893423 Electrical circuit device having carbon nanotube fabrication from crystallography oriented catalyst Feb. 22, 2011
7893605 Back-gated field emission electron source Feb. 22, 2011
7884324 Nanopillar arrays for electron emission Feb. 8, 2011
7876038 Organic light emitting display Jan. 25, 2011
7868531 Carbon nanotube arrays for field electron emission Jan. 11, 2011
7851999 Light emitting device Dec. 14, 2010
7816866 Photocathode comprising a plurality of openings on an electron emission layer Oct. 19, 2010
7808174 Polymer light-emitting diode Oct. 5, 2010
7795608 Photocathode Sep. 14, 2010
7791258 Activation effect on carbon nanotubes Sep. 7, 2010
7772584 Laterally grown nanotubes and method of formation Aug. 10, 2010
7745984 Composition for preparing electron emission source, method for preparing electron emission source using the composition, and electron emission source Jun. 29, 2010
7687876 Controlled growth of a nanostructure on a substrate Mar. 30, 2010
7667223 Solid-state optical device Feb. 23, 2010
7667278 Metal carbide gate structure and method of fabrication Feb. 23, 2010
7656086 Organic light emitting diode display and method of manufacture thereof Feb. 2, 2010
7651875 Catalysts Jan. 26, 2010
7649173 Method of preparing a sample for transmission electron microscopy Jan. 19, 2010

1 2 3 4 5 6 7 8

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