On the photoluminescence emission of ZnO nanocrystals

Autor:	Shailaja Mahamuni, Darshana Y. Inamdar, Shital R. Vaidya
Rok vydání:	2012
Předmět:	Photoluminescence Materials science business.industry Biomedical Engineering Physics::Optics Bioengineering Dielectric Photochemistry Blueshift Solvent Condensed Matter::Materials Science Zno nanocrystals Nanocrystal Relaxation effect Optoelectronics General Materials Science Luminescence business
Zdroj:	Journal of Experimental Nanoscience. 9:533-540
ISSN:	1745-8099 1745-8080
DOI:	10.1080/17458080.2012.676678
Popis:	Photoluminescence emission (PL) behaviour of ZnO nanocrystals capped by different organic molecules and dispersed in solvents with increasing dielectric constant is studied. PL energy is observed to red shift or blue shift or even remains invariant with increasing dielectric constant of the dispersing medium depending on the capping agent. The effective dielectric constant of the dispersing medium shifts the surface defect levels energetically and governs the interfacial charge re-organisation. Further, solvent relaxation effects also cause lowering of the energy levels. Defects located at the surface of nanocrystals profoundly influence the luminescence behaviour.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dc1c52242ab4753cf5ef432839ae76a4 https://doi.org/10.1080/17458080.2012.676678 Zobrazit plný text záznamu