24-30 September 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Graphene and Quantum Dot Photocathodes: Lifetime and Performance Benefits

25 Sep 2017, 11:30
30m
SML, Sala Maria Luisa, Hotel Hermitage

SML, Sala Maria Luisa, Hotel Hermitage

<a target="_blank" href=http://www.elba4star.it/en/>Hotel Hermitage</a>
talk Invited Plenary Talk Plenary 2

Speaker

Robel Istvan (Los Alamos National Laboratory)

Description

Since their inception, photocathode materials have been generally fallen into one of three categories: a bulk metal (such as copper or magnesium); a bulk semiconductor, perhaps with a surface treatment (such as cesiated gallium arsenide); or a thin-film semiconductor (for example cesium telluride deposited upon a molybdenum substrate). In recent years, apart from process improvements, there has been a significant effort to both improve the performance of existing photocathodes, and to develop and study new photocathode materials. The ACERT effort at Los Alamos has pursued both of these paths. This talk will review our efforts both to develop graphene coatings for cathodes for lifetime improvement; and to develop quantum dot photocathodes, which appear to combine air stability with improved QE over copper. We present our findings to date, and intended path towards future studies.

Primary authors

Aditya Mohite (Los Alamos National Laboratory) Enrique R. Batista (Los Alamos National Laboratory) Fangze Liu (Los Alamos National Laboratory) Gautam Gupta (Los Alamos National Laboratory) Hisato Yamaguchi (Los Alamos National Laboratory) Jaehoon Lim (Los Alamos National Laboratory) Jeffrey M. Pietryga (Los Alamos National Laboratory) John W. Lewellen (Los Alamos National Laboratory) Mark A. Hoffbauer (Los Alamos National Laboratory) Nathan A. Moody (Los Alamos National Laboratory) Nikolay S. Makarov (Los Alamos National Laboratory) Robel Istvan (Los Alamos National Laboratory) Vitaly Pavlenko (Los Alamos National Laboratory)

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