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Il Nuovo Cimento B (1971-1996)

, Volume 5, Issue 2, pp 204–218 | Cite as

On the optical energy gaps of substitutional solid solutions between some sulphides and selenides of II-VI compounds

  • A. Congiu
  • P. Manca
  • A. Spiga
Article

Summary

Substitutional mixed systems of different composition in the group of II-VI compounds, having composite valence and/or conduction bands, were prepared and studied in the form of microcrystalline powders and single crystals. The comparative analysis of the dependence of the optical energy gaps on composition and temperature reveals different contributions to the thermal coefficients of the energy gaps according to the ionic substitution type.

Об оптических энерге тических щелях тверд ых растворов замещен ия между некоторыми сульфида ми и селенидами II-VI соед инений

Резюме

Были приготовлены и и сследованы смешанны е системы замещения р азличного состава в группе II-VI сое динений, которые имею т комбинированную ва лентность или зоны проводимости ил и и то и другое, в виде м икрокристаллически х порошков и монокристаллов. Срав нительный анализ зав исимости оптических энергетических щеле й от состава и температ уры обнаруживает раз личные вклады в темпе ратурные коэффициенты энерге тических щелей, в соот ветствии с ионным тип ом замещения.

Riassunto

Sono stati preparati e studiati, sotto forma di polveri microcristalline e di monocristalli, i sistomi misti sostituzionali a diversa composizione, fra composti del gruppo II-VI. L’analisi della variazione dell’altezza della banda proibita in funzione della composizione e della temperatura, da spettri di diffusione e di assorbimento, mette in evidenza contributi al coeffioiente termico dell’intervallo energetioo, differenti a seconda del tipo di sostituzione ionica.

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Copyright information

© Società Italiana di Fisica 1971

Authors and Affiliations

  • A. Congiu
    • 1
    • 2
  • P. Manca
    • 1
    • 2
  • A. Spiga
    • 1
    • 2
  1. 1.Islituto di Fisica dell’UniversitàCagliari
  2. 2.Gruppo Nazionale di Struttura della Materia del CNRItalia

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