Hopping and optical absorption of electrons in nano-porous crystal 12CaO·7Al2O3

Peter V. Sushko, Alexander L. Shluger, Katsuro Hayashi, Masahiro Hirano, Hideo Hosono

Research output: Contribution to journalConference articlepeer-review

67 Citations (Scopus)


Recently it has been discovered that a nano-porous main group oxide 12CaO·7Al2O3 (C12A7) can be converted from a wide-gap insulator to a good transparent conductor. Using ab initio modelling we explain good conductivity of this material by very small barriers for hopping of localised electrons between neighbouring positive cages. We show that optical absorption of C12A7 in infrared region and at energies higher than 2.7 eV is due to inter-cage and intra-cage electron transitions, respectively. The proposed mechanisms can be useful in further search for conducting transparent media.

Original languageEnglish
Pages (from-to)161-167
Number of pages7
JournalThin Solid Films
Issue number2
Publication statusPublished - Dec 15 2003
Externally publishedYes
EventProceedings of the 3rd International Symposium on Transparent Oxide - Tokyo, Japan
Duration: Apr 10 2003Apr 11 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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