Publicou 12 edições por ano
ISSN Imprimir: 0040-2508
ISSN On-line: 1943-6009
Indexed in
Structure and Technology Problems of Semiconductor Film for Photovoltaic Devices
RESUMO
We compared structural features of good quality semiconductor compounds with real semiconductor films with tetrahedral composition. We show that a typical structural model of a real film has to include crystal plates of polymorphic phases and twins that alternate with each other in the direction normal to close-packed planes of grains. It is necessary to employ special methods of structural analysis to discover polymorphic metastable phases and differently oriented fractions of primary and secondary twins even if the amount of these components is commensurable with the main component. We present and substantiate a hypothesis that packets of regular crystallographic planes separate polymorphic and twin plates. These packets consist of atoms of the excessive component of this nonstoichiometric chemical compound. We also discuss issues that are brought by inhomogeneity of morphology, crystallographic nature and structural perfection of heterojunction interfaces.