p- and n-type CuInSe2 thin films were grown from close-spaced vapour t
ransport in a vertical closed tube. The electrical conductivity variat
ion of the films from p- to n-type was obtained by a simple adjustment
of the source and substrate temperatures during the growth. The depos
itions were carried out in the temperature range where the films are n
early stoichiometric (approximate to 400 to 580 degrees C). The films
were characterized by X-rays, scanning electron microscopy, energy dis
persive spectroscopy, optical absorption and Hall effect studies.