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VOLUME 23 (1976) | ISSUE 10 | PAGE 574
Complicated exciton-impurity complexes in tin dioxide
When SnOz is doped with indium or antimony, complex centers are produced, to which excitons start to be bound. The ground state of the exciton-impurity complex yields an absorption line whose energy does not depend on the type of introduced impurity, whereas the excited states have different spectra.