释义 |
negative electron-affinity material [`neg·ǝd·iv i`lek´trän ǝ`fin·ǝd·ē mǝ´tir·ē·ǝl] ELECTRONICS A material, such as gallium phosphide, whose surface has been treated with a substance, such as cesium, so that the surface barrier is reduced, band-bending occurs so that the top of the conduction band lies above the vacuum level, and the electron affinity of the substance in negative. Abbreviated NEA material. |