Observation of a negative electron affinity for boron nitride

M. J. Powers; M. C. Benjamin; L. M. Porter; R. J. Nemanich; R. F. Davis; J. J. Cuomo; G. L. Doll; Stephen J. Harris

doi:10.1063/1.115315

Observation of a negative electron affinity for boron nitride

M. J. Powers, M. C. Benjamin, L. M. Porter, R. J. Nemanich, R. F. Davis, J. J. Cuomo, G. L. Doll, Stephen J. Harris

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168 Scopus citations

Abstract

This study reports UV-photoemission (UPS) measurements made on boron nitride crystals and thin films. The materials examined are commercial grade c-BN powder and thin films of BN deposited with ion beam assisted e-beam evaporation and laser ablation. The thin film samples examined exhibited varying amounts of sp³ (cubic) and sp² (hexagonal, amorphous) bonding as determined by FTIR measurements. The UPS measurements displayed the spectral distribution of the low energy photoemitted electrons and the total energy width of the spectra. These characteristics can be related to the electron affinity. The measurements on several of the BN powder and thin film samples revealed features in the emission spectra which are indicative of a negative electron affinity (NEA) surface.

Original language	English (US)
Pages (from-to)	3912
Number of pages	1
Journal	Applied Physics Letters
Volume	67
DOIs	https://doi.org/10.1063/1.115315
State	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Observation of a negative electron affinity for boron nitride",

abstract = "This study reports UV-photoemission (UPS) measurements made on boron nitride crystals and thin films. The materials examined are commercial grade c-BN powder and thin films of BN deposited with ion beam assisted e-beam evaporation and laser ablation. The thin film samples examined exhibited varying amounts of sp3 (cubic) and sp2 (hexagonal, amorphous) bonding as determined by FTIR measurements. The UPS measurements displayed the spectral distribution of the low energy photoemitted electrons and the total energy width of the spectra. These characteristics can be related to the electron affinity. The measurements on several of the BN powder and thin film samples revealed features in the emission spectra which are indicative of a negative electron affinity (NEA) surface.",

author = "Powers, {M. J.} and Benjamin, {M. C.} and Porter, {L. M.} and Nemanich, {R. J.} and Davis, {R. F.} and Cuomo, {J. J.} and Doll, {G. L.} and Harris, {Stephen J.}",

year = "1995",

doi = "10.1063/1.115315",

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journal = "Applied Physics Letters",

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T1 - Observation of a negative electron affinity for boron nitride

AU - Powers, M. J.

AU - Benjamin, M. C.

AU - Porter, L. M.

AU - Nemanich, R. J.

AU - Davis, R. F.

AU - Cuomo, J. J.

AU - Doll, G. L.

AU - Harris, Stephen J.

PY - 1995

Y1 - 1995

N2 - This study reports UV-photoemission (UPS) measurements made on boron nitride crystals and thin films. The materials examined are commercial grade c-BN powder and thin films of BN deposited with ion beam assisted e-beam evaporation and laser ablation. The thin film samples examined exhibited varying amounts of sp3 (cubic) and sp2 (hexagonal, amorphous) bonding as determined by FTIR measurements. The UPS measurements displayed the spectral distribution of the low energy photoemitted electrons and the total energy width of the spectra. These characteristics can be related to the electron affinity. The measurements on several of the BN powder and thin film samples revealed features in the emission spectra which are indicative of a negative electron affinity (NEA) surface.

AB - This study reports UV-photoemission (UPS) measurements made on boron nitride crystals and thin films. The materials examined are commercial grade c-BN powder and thin films of BN deposited with ion beam assisted e-beam evaporation and laser ablation. The thin film samples examined exhibited varying amounts of sp3 (cubic) and sp2 (hexagonal, amorphous) bonding as determined by FTIR measurements. The UPS measurements displayed the spectral distribution of the low energy photoemitted electrons and the total energy width of the spectra. These characteristics can be related to the electron affinity. The measurements on several of the BN powder and thin film samples revealed features in the emission spectra which are indicative of a negative electron affinity (NEA) surface.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Observation of a negative electron affinity for boron nitride

Abstract

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