OXIDE-FILMS OF COPPER PREPARED BY THE OXIDATION OF COPPER SULFIDE FILMS

Authors
JOSEPH KS PRADEEP B
Citation
Ks. Joseph et B. Pradeep, OXIDE-FILMS OF COPPER PREPARED BY THE OXIDATION OF COPPER SULFIDE FILMS, Pramana, 42(1), 1994, pp. 41-47
Citations number
25
Categorie Soggetti
Physics
Journal title
Pramana → ACNP
ISSN journal
03044289
Volume
42
Issue
1
Year of publication
1994
Pages
41 - 47
Database
ISI
SICI code
0304-4289(1994)42:1<41:OOCPBT>2.0.ZU;2-V
Abstract
Copper sulphide films prepared by reactive evaporation, when heated in air at 500K, oxidized to Cu2O after a series of intermediate chemical transitions. Golden yellow coloured Cu2O films showed a large absorpt ion before the fundamental absorption edge. The optical band gap was f ound to be (2.29+/-0.02)eV. When these Cu2O films were further heated they got converted to CuO and the optical band gap was found to be (2. 17+/-0.02)eV.