Influence of Growth Method on K3sb Photocathode Structure and Performance∗
نویسندگان
چکیده
A combination of material science techniques is used to determine the influence of the growth parameters on structure and performance of photocathode materials. In-situ x-ray diffraction (XRD) and in-situ grazing incidence small angle x-ray scattering (GiSAXS), as well as after growth xray reflectivity (XRR) and θ/2θ XRD measurements were performed at synchrotron radiation sources. K3Sb is a precursor material for the preparation of CsK2Sb and Na2KSb. The materials growth was studied intensively to optimize this intermediate growth step in terms of quantum efficiency and roughness. The results of two growth methods, a “layer by layer” type and a “super-lattice type”, are presented, as well as the interaction of the K3Sb phase with Cesium.
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