부산대학교 도서관

The review of the studies of exponential-doping III–V photocathode with negative electron affinity (NEA) performed by the authors at the Nanjing University of Science and Technology (Nanjing) are presented. The results of these studies are used for further improving the performance of NEA photocathode. In particular, the requirements to III–V photocathode, which are necessary for the preparation of NEA photocathode with ultimate parameters, are analyzed. To meet these requirements, the academic researches aimed at designing structure and optics capability of photocathode, and the experimental procedures aimed at material growth, atomical cleanness, and NEA activation, are developed. The optics capability, carrier concentration distribution, surface photovoltage spectroscopy characterization of varied-doping, spectral response of photocathodes are studied, and the relation of these phenomena to the physical limits of NEA photocathode performance are discussed.