DETERMINATION OF THE THERMAL-ACTIVATION ENERGY AND OPTICAL BAND-GAP OF COBALT PHTHALOCYANINE THIN-FILMS

Authors
AMBILY S MENON CS
Citation
S. Ambily et Cs. Menon, DETERMINATION OF THE THERMAL-ACTIVATION ENERGY AND OPTICAL BAND-GAP OF COBALT PHTHALOCYANINE THIN-FILMS, Materials letters, 34(3-6), 1998, pp. 124-127
Citations number
10
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
34
Issue
3-6
Year of publication
1998
Pages
124 - 127
Database
ISI
SICI code
0167-577X(1998)34:3-6<124:DOTTEA>2.0.ZU;2-U
Abstract
Thin films of cobalt phthalocyanine (CoPc) were prepared by vacuum eva poration of cobalt phthalocyanine powder at a pressure of 10(-5) Torr. Silver electrodes act as ohmic contacts for electrical connections. F ilms were annealed at 50, 100, 150 and 200 degrees C. The electrical c onductivity studies were done in vacuum (<10(-3) Torr). The W-visible spectra were recorded and the optical band gap determined. The variati on of the optical band gap with annealing temperature was determined. The effect of annealing on thermal activation energy is also reported in this paper. (C) 1998 Elsevier Science B.V.