Thin films of CuInSe2produced by a solid state reaction from stacked elemental layers

Abstract
Thin films of CuInSe2 have been prepared from elemental stacked structures by annealing in vacuum. X-ray powder diffractometry and reflection electron diffraction show the films to be polycrystalline, possessing the characteristic chalcopyrite structure. Optical measurements indicate a direct gap material with Eg=1.01 eV. Both n- and p-type films have been prepared with resistivities in the range 1 to 104 Omega cm. The potential application of this new preparation technique to large area solar cells is discussed.

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