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Title: Photon enhanced thermionic emission

Photon Enhanced Thermionic Emission (PETE) is exploited to provide improved efficiency for radiant energy conversion. A hot (greater than 200.degree. C.) semiconductor cathode is illuminated such that it emits electrons. Because the cathode is hot, significantly more electrons are emitted than would be emitted from a room temperature (or colder) cathode under the same illumination conditions. As a result of this increased electron emission, the energy conversion efficiency can be significantly increased relative to a conventional photovoltaic device. In PETE, the cathode electrons can be (and typically are) thermalized with respect to the cathode. As a result, PETE does not rely on emission of non-thermalized electrons, and is significantly easier to implement than hot-carrier emission approaches.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1160132
Assignee:
The Board of Trustees of the Leland Stanford Junior University (Palo Alto, CA) SLAC
Patent Number(s):
8,853,531
Application Number:
12/589,122
Contract Number:
AC02-76SF00515
Resource Relation:
Patent File Date: 2009 Oct 16
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Works referenced in this record:

Temperature effects in angle-resolved photoemission spectra from metals
journal, January 1993

Temperature-dependent photoemission spectra from Cu(100) and Cu(111) surfaces
journal, April 1993