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Emeryville, CA, United States

Jeong H.-S.,University of Suwon | Keller K.,Photegra Corporation | Culkin B.,Photegra Corporation
Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics | Year: 2015

This paper presents a new concept for a planar light source utilizing Cs3Sb photocathodes as flat electron emitters. The design concept of the devices with a diode structure was that the photocathodes were to be operated in a reflective mode. Commercially available P-22 phosphors were used as a light source of desirable wavelengths. Light emission from the devices was induced by photoemitted electrons, accelerated by an anode electric field that was shielded from the photoemitter surface. The luminescent characteristics of the devices were investigated by measuring the optical parameters as functions of applied anode voltages. The results showed the possibility to produce a more directable and easily controllable stream of light. These make the devices suitable for a variety of planar lighting applications. © 2015 American Vacuum Society.


Jeong H.-S.,University of Suwon | Keller K.,Photegra Corporation | Culkin B.,Photegra Corporation
Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics | Year: 2015

A Cs3Sb photocathode was deposited on a flat metal surface using a nonvacuum processing technique and in-situ panel devices were fabricated. The technique does not require ultrahigh vacuum conditions as in conventional techniques. The electrical characteristics of the panel devices were investigated by measuring the anode current as functions of devices operation times. Blue light with a 450nm wavelength was used as an excitation source. The result shows that the Cs3Sb photocathode emitter has the potential of a long lifetime with stable electron emission characteristics in the panel making it a suitable cathode material for panel devices. © 2015 American Vacuum Society.

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