一、引言 银氧铯(S-1)光电阴极是1929年出现的第一个实用光电阴极,它是可见光和近红外灵敏的光电阴极,第一只电视摄像管和红外变像管就是利用这种光电阴极制成的,虽然人们对这种阴极进行了许多研究工作,但它的发射机理仍然是个谜。因此有人说,出现了Ⅲ-Ⅴ族光电阴极,S-1将被淘汰,它的发射机理搞不清楚也就算了,但它的近红外光谱灵敏度仍吸引着 I. INTRODUCTION Silver Sulfide (S-1) photocathode was the first practical photocathode to emerge in 1929. It is a photocathode with visible light and near-infrared sensitivity. The first TV camera and infrared video tube are the use of this A photocathode made from this kind of cathode, although much research has been done on this kind of cathode, its launch mechanism remains a mystery. Therefore, some people say that there is a III-V photocathode, S-1 will be eliminated, its emission mechanism is unclear, and its near-infrared spectral sensitivity still attracts