| 摘要 |
PROBLEM TO BE SOLVED: To provide a photocathode capable of improving various characteristics.SOLUTION: In a photocathode 10, an intermediate layer 14, an underlying layer 16, and a photoelectron emitting layer 18 are formed in this order on a substrate 12. The photoelectron emitting layer 18 contains Sb and Bi, and comprises a function for emitting photoelectrons outside by incident light. The photoelectron emitting layer 18 contains the Bi of 6.9 mol% or more and 32 mol% or less to SbBi. |
