Luminescence at low temperature in pure ZnO phosphors

(Eng) In this paper, samples of pure ZnO were prepared through solid - state chemical reaction, and optical spectral properties were investigated at low temperature. It was found that the strong broad band emission was shifted to the blue side with increase of temperature. It is tentatively attribut...

Full description

Autores:
Mosquera, Edgar
Tipo de recurso:
Article of journal
Fecha de publicación:
2020
Institución:
Universidad del Valle
Repositorio:
Repositorio Digital Univalle
Idioma:
eng
OAI Identifier:
oai:bibliotecadigital.univalle.edu.co:10893/17773
Acceso en línea:
https://hdl.handle.net/10893/17773
Palabra clave:
Excitons
Phonons
Photolumin escence (PL)
ZnO
Excitones
Fonones
Fotoluminiscencia (FL)
ZnO
Excitones
Fonones
Fotoluminiscencia (FL)
ZnO
Rights
closedAccess
License
http://purl.org/coar/access_right/c_14cb
Description
Summary:(Eng) In this paper, samples of pure ZnO were prepared through solid - state chemical reaction, and optical spectral properties were investigated at low temperature. It was found that the strong broad band emission was shifted to the blue side with increase of temperature. It is tentatively attributed to the ch ange of local electric field from electric dipoles, orientation of which is sensitive to temperature. The ultraviolet sharp lines observed at low temperatures are assigned to bound excitons and their phonon replicas.