CATHODE FOR PHOTOELECTRON OR SECONDARY ELECTRON EMISSION, PHOTOMULTIPLIER TUBE AND ELECTRONMULTIPLIER TUBE

摘要

PROBLEM TO BE SOLVED: To provide a cathode for photoelectron or secondary electron emission in which quantum efficiency, more particularly red color sensitivity can be improved and the spectrophoto sensitivity or secondary electron emission property can be improved. ;SOLUTION: In cathode 5 for photoelectron emission, a photoelectron surface 5d formed from materials such as alkali antimony compound which discharges photoelectrons by incident of light or secondary electrons by incident of electrons is provided on Ni electrode substrate 5c in which Al layer 5b is vapor deposited. An intermediate layer 5a formed from carbon nano tube is disposed between the photoelectron surface 5d and the Ni electrode substrate 5c. Therefore, defect density inside of particles is lowered and recombination ration of electron and positive hole is remarkably lowered to improve quantum efficiency.;COPYRIGHT: (C)2001,JPO