A. Abdellaoui et al., ITERATIVELY DERIVED OPTICAL-CONSTANTS OF MOO3 POLYCRYSTALLINE THIN-FILMS PREPARED BY CVD, Thin solid films, 304(1-2), 1997, pp. 39-44
Polycrystalline MoO3 thin films have been prepared by oxidation at hig
h temperature of molybdenum compound layers deposited by chemical vapo
ur deposition (CVD) from molybdenum hexacarbonyl Mo(CO),. In this pape
r is presented the experimental procedure to prepare polycrystalline M
oO3 coatings by annealing at various temperatures and in various annea
ling environments of ''black molybdenum'' or ''reflective molybdenum''
thin films. From X-ray diffraction measurements the structure of the
films has been determined. The optical constants II and k of films wer
e calculated by numerical iteration, using the Fresnel laws and disper
sion relations of n and k. From these results the optical gap E-g has
been deduced. AU the samples exhibited the electrochromic effect. (C)
1997 Elsevier Science S.A.