FILM OF POLYCRYSTALLINE SEMICONDUCTOR MATERIAL, METHOD OF MAKING SAME AND ORIENTING/UNDERCOOLING MOLDS THEREFOR, AND ELECTRONIC DEVICE

摘要

A film of polycrystalline semiconductor material, a method of making the film and orienting/undercooling molds that are useful in the method, and an electronic device comprising or prepared from the film. An orienting/undercooling mold that is impermeable to gas flow, the orienting/undercooling mold comprising a first orienting/undercooling surface configured with a basal surface consisting essentially of a low nucleation-potency material and with a plurality of contact points, at least some of the plurality of contact points consisting essentially of a monocrystalline semiconductor material for orienting crystal growth and controlling positions of nucleation sites on the orienting/undercooling surface, and any remainder of the plurality of contact points consisting essentially of a low nucleation-potency material for controlling heat transfer without functioning as nucleation sites; and wherein crystal lattices of at least 80 percent of the total number of the contact points consisting essentially of a monocrystalline semiconductor material are oriented parallel to each other.