Cathode Low work function, magnesium, lithium fluoride, silver The performance of these devices is evaluated by quantum efficiency and power efficiency. Different metrics for quantum efficiency include internal and external quantum efficiency. 1.3.11 Internal quantum efficiency ...
Semiconductor materials like Cesium Telluride (Cs2Te) provide a quantum efficiency (QE) that is much larger in magnitude than metal photocathodes like copper (Cu) or magnesium (Mg), while the operational time of the metal photocathodes is huge relative to semiconductors [16]. RF photoinjectors ...