Diamond surfaces with air-stable negative electron affinity and giant electron yield enhancement

O'Donnell KM, Edmonds MT, Ristein J, Tadich A, Thomsen L, Wu QH, Pakes CI, Ley L (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Advanced Functional Materials Wiley-VCH Verlag

Publisher: Wiley-VCH Verlag

Book Volume: 23

Pages Range: 5608-5614

DOI: 10.1002/adfm.201301424

Abstract

The presence of an air-stable negative electron affinity (NEA) on lithium-covered oxygen-terminated diamond after a thermal activation process is demonstrated. The NEA is unequivocally established by the onset of photoelectron yield at the bandgap energy of 5.5 eV. This surface exhibits a secondary electron yield enhancement by a factor of 200, compared to a surface with positive electron affinity. The surface chemistry leading to the necessary surface dipole was elucidated by core-level photoemission spectroscopy in conjunction with previous theoretical calculations. The insensitivity to the details of the deposition process opens a route to practical and robust negative-electron affinity devices based on diamond. A robust, air-stable negative electron affinity diamond surface with giant secondary electron yield enhancement is introduced. Starting with oxidized diamond (100), lithium deposition and annealing induce a structural and electronic change to a negative electron affinity surface showing electron yield enhancement greater than 200. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Authors with CRIS profile

Jürgen Ristein Lehrstuhl für Laserphysik Lothar Ley Naturwissenschaftliche Fakultät

Involved external institutions

Australian Synchrotron AU Australia (AU) La Trobe University AU Australia (AU) Quanzhou Normal University / 泉州师范学院 CN China (CN)

How to cite

APA:

O'Donnell, K.M., Edmonds, M.T., Ristein, J., Tadich, A., Thomsen, L., Wu, Q.-H.,... Ley, L. (2013). Diamond surfaces with air-stable negative electron affinity and giant electron yield enhancement. Advanced Functional Materials, 23, 5608-5614. https://dx.doi.org/10.1002/adfm.201301424

MLA:

O'Donnell, Kane M., et al. "Diamond surfaces with air-stable negative electron affinity and giant electron yield enhancement." Advanced Functional Materials 23 (2013): 5608-5614.

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