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Title: Photon enhanced thermionic emission

Abstract

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:
; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1160132
Patent Number(s):
8,853,531
Application Number:
12/589,122
Assignee:
The Board of Trustees of the Leland Stanford Junior University (Palo Alto, CA) SLAC
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Patent
Resource Relation:
Patent File Date: 2009 Oct 16
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Schwede, Jared, Melosh, Nicholas, and Shen, Zhixun. Photon enhanced thermionic emission. United States: N. p., 2014. Web.
Schwede, Jared, Melosh, Nicholas, & Shen, Zhixun. Photon enhanced thermionic emission. United States.
Schwede, Jared, Melosh, Nicholas, and Shen, Zhixun. Tue . "Photon enhanced thermionic emission". United States. https://www.osti.gov/servlets/purl/1160132.
@article{osti_1160132,
title = {Photon enhanced thermionic emission},
author = {Schwede, Jared and Melosh, Nicholas and Shen, Zhixun},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {10}
}

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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