单词	exciton
释义	exciton /ˈɛksɪtɒn / /ɪkˈsʌɪtɒn/ noun Physics A mobile concentration of energy in a crystal formed by an excited electron and an associated hole.As the group intensified optical stimulation during the experiments, though, the number of excitons increased and the electron/electron-hole pairs cancelled each other.... The injected electrons and holes combine to form excitons, or electron-hole pairs, bound together by their mutual attraction. Some of these excitons emit light when they decay to the ground state. Origin 1930s: from excitation + -on.
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