Antimonide

About: Antimonide is a research topic. Over the lifetime, 972 publications have been published within this topic receiving 10981 citations. The topic is also known as: antimonides.

Temperature-dependent quantum efficiency degradation of K-Cs-Sb bialkali antimonide photocathodes grown by a triple-element codeposition method

Abstract: K-Cs-Sb bialkali antimonide photocathodes grown by a triple-element codeposition method have been found to have excellent quantum efficiency (QE) and outstanding near-atomic surface smoothness and have been employed in the VHF gun in the Advanced Photoinjector Experiment (APEX), however, their robustness in terms of their lifetime at elevated photocathode temperature has not yet been investigated. In this paper, the relationship between the lifetime of the K-Cs-Sb photocathode and the photocathode temperature has been investigated. The origin of the significant QE degradation at photocathode temperatures over $70\text{ }\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ has been identified as the loss of cesium atoms from the K-Cs-Sb photocathode, based on the in situ x-ray analysis on the photocathode film during the decay process. The findings from this work will not only further the understanding of the behavior of K-Cs-Sb photocathodes at elevated temperature and help develop more temperature-robust cathodes, but also will become an important guide to the design and operation of the future high-field rf guns employing the use of such photocathodes.

ANTIMONY/LEWIS BASE ADDUCTS FOR Sb-ION IMPLANTATION AND FORMATION OF ANTIMONIDE FILMS

Abstract: An antimony/Lewis base adduct of the formula SbR3.L, wherein each R is independently selected from C1 - C8 alkyl, C1 - C8 perfluoroalkyl, C1 - C8 haloalkyl, C6 - C10 aryl, C6 - C10 perfluoroaryl, C6 - C10 haloaryl, C6 - C10 cycloalkyl, substituted C6 - C10 aryl and halo; and L is a Lewis base ligand coordinating with SbR3. The adducts of the invention are useful as metal source compositions for chemical vapour deposition, assisted chemical vapor deposition (e.g., laser-assisted chemical vapor deposition, light-assisted chemical vapor deposition, plasma-assisted chemical vapor deposition and ion-assisted chemical vapor deposition), ion implantation, molecular beam epitaxy, and rapid thermal processing, to form antimony or antimony-containing films.

Band-gap tuning by solid-state intercalations of Mg, Ni, and Cu into Mo3Sb7

Abstract: Mo3Sb7 was synthesized by heating the elements in the stoichiometric ratio in a sealed silica tube at 700 °C. The title compounds AδMo3Sb7 (A = Mg, Ni, Cu) were prepared by annealing prereacted Mo3Sb7 with different amounts of A in powder form between 500 and 750 °C. According to our single-crystal structure studies, the A atoms can be intercalated in small amounts into the cubic voids of the Mo3Sb7 structure without noticeable symmetry changes (space group Imm). The different cations cause different band-gap decreases that depend on the element as well as its concentration.Key words: thermoelectrics, band-gap tuning, intercalation, antimonide, electronic structure.