Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen: http://dspace.msu.edu.ua:8080/jspui/handle/123456789/6833
Titel: Influence of cation vacancies and Bi impurity on the electronic structure and photoelectric properties of orthorhombic GeS
Autoren: Bletskan, D. I.
Glukhov, K. E.
Kabatsii, V. M.
Кабацій, Василь Миколайович
Stichwörter: Germanium monosulfide
Electronic structure
Point defects
Photoconductivity
Photoluminescence
Моносульфід германію
електронна структура
точкові дефекти
фотопровідність
фотолюмінесценція
Erscheinungsdatum: 2019
Zusammenfassung: Quantum-chemical studies of GeS electronic structure containing intrinsic point defects (vacancies in the cation (VGe) and anion (VS) sublattices), isolated substitutional impurities BiGe and {VGe–BiGe}-type complexes were performed using density functional theory in the LDA+U-approximation as well as their role in the formation of photoelectric characteristics of the crystals was discussed. It was established that the localization of Bi impurity predominantly in the germanium positions induces the appearance of donor-type levels in the bandgap compensating the acceptor levels formed by cation vacancies which lead to the increase of dark resistivity as well as the sharp increase of photosensitivity of GeS crystals. The features of chemical bonding in the defect-free and defective GeS crystals were analyzed on the basis of electronic density distribution maps. Electronic density maps clearly show the covalent-ionic bond nature within the corrugated doublelayer packets with the predominant charge concentration on Ge–S (Bi–S) bonds as well as the weak van der Waals bond components between double-layer packets with the participation of germanium electronic lone pair.
Beschreibung: Bletskan D. I. Influence of cation vacancies and Bi impurity on the electronic structure and photoelectric properties of orthorhombic GeS / D. I. Bletskan, K. E. Glukhov, V. M. Kabatsii // Journal of Optoelectronics and Advanced Materials. -2019 p. - Vol. 21, No. 9-10. - Р. 629 - 640
URI: http://dspace.msu.edu.ua:8080/jspui/handle/123456789/6833
Enthalten in den Sammlungen:Статті

Dateien zu dieser Ressource:
Datei Beschreibung GrößeFormat 
Influence_ of_ cation_ vacancies _and_ Bi_ impurity _on _the_ electronic_ structure _and _photoelectric_ properties_ of _orthorhombic _GeS.pdfInfluence of cation vacancies and Bi impurity on the electronic structure and photoelectric properties of orthorhombic GeS2.32 MBAdobe PDFÖffnen/Anzeigen


Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt, soweit nicht anderweitig angezeigt.