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Browsing by Subject "Photoluminescence"

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Analysis of the structure, particle morphology and photoluminescent properties of ZnS:Mn2+ nanoparticulate phosphors

Author: Raleaooa, PV ; Roodt, A ; Mhlongo, Gugu H ; Motaung, David E ; Ntwaeaborwa, OM Date: Jan 2018 The structure, particle morphology and photoluminescent properties of n(sup2+) doped ZnS nanoparticles are reported. The X-ray powder diffraction studies showed that incorporation of Mn(sup2+) did not cause any change to the crystallized cubic ... Read more
Au-controlled enhancement of photoluminescence of NiS nanostructures synthesized via a microwave-assisted hydrothermal technique

Author: Linganiso, EC ; Mwakikunga, Bonex W ; Mhlanga, SD ; Coville, NJ Date: Nov 2014 Nickel sulphide (NiS) nanostructures decorated with gold (Au) nanoparticles (NPs) were synthesized via a microwave-assisted hydrothermal technique. Binary phase NiS (a and ß) crystalline nanostructures, bare, and decorated with Au NPs were ... Read more
Enhanced exciton emission from ZnO nano-phosphor induced by Yb3+ ions

Author: Kabongo, GL ; Mhlongo, Gugu H ; Mothudi, BM ; Hillie, KT ; Swart, HC ; Dhlamini, MS Date: 2014 In this work, the sol–gel method was used to prepare Ytterbium (Yb(sup3+)) doped ZnO nano-phosphors with different concentrations of Yb(sup3+) ions. Their structural, morphological, photoluminescence, electronic states and the chemical ... Read more
The influence of Pr3+ co-doping on the photoluminescence and cathodoluminescence properties of SiO2:Eu3+/Tb3+

Author: Mhlongo, Gugu H ; Dhlamini, MS ; Ntwaeaborwa, OM ; Swart, HC ; Hillie, KT Date: Jul 2011 Tb3+-Pr3+, and Eu3+-Pr3+ ion pairs co-doped in a SiO2 matrix were prepared by a sol-gel method. Co-doping of Eu3+ and Tb3+ ions with Pr3+ in SiO2 resulted in the quenching of Eu3+ and Tb3+ emissions with increasing Pr3+ concentrations. The ... Read more
Interfacial analysis and properties of regioregular Poly (3-Hexyl thiophene) spin-coated on an Indium tin oxide coated glass substrate

Author: Malgas, GF ; Arendse, CJ ; Mavundla, S ; Cummings, FR Date: Aug 2008 Interfacial analysis of the rrP3HT samples spincoated on a glass substrate was studied in detail using transmission electron microscopy (TEM) and SEM measurements. Very homogeneous and smooth polymer (P3HT and PEDOT:PSS) layers are observed ... Read more
Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites

Author: Raleaooa, PV ; Roodt, A ; Mhlongo, Gugu H ; Motaung, David E ; Kroon, RE ; Ntwaeaborwa, OM Date: Feb 2017 The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ... Read more
Microstructural and photoluminescence properties of sol–gel derived Tb3+ doped ZnO nanocrystals

Author: Kabongo, GL ; Mhlongo, Gugu H ; Malwela, T ; Mothudi, BM ; Hillie, KT ; Dhlamini, MS Date: Apr 2014 Un-doped and Tb(Sup3+) doped ZnO nanocrystals with different concentrations of Tb(Sup3+) were synthesized by a sol–gel method and their photoluminescence (PL) properties were investigated. The successful incorporation of Tb(sup3+) ions with ... Read more
Optical and structural properties of nanostructured ZnO thin films deposited onto FTO/glass substrate by a solution-based technique

Author: Berruet, M ; Pereyra, CJ ; Mhlongo, Gugu H ; Dhlamini, MS ; Hillie, KT ; Vázquez, M ; Marotti, RE Date: Oct 2013 Nanostructured zinc oxide thin films were spin coated on conductive glass substrates via a sol–gel based technique using zinc acetate dihydrate as precursor. The pH of the alkalis used as catalytic agents in the hydrolysis step is shown to ... Read more
Photoluminescence studies of green emitting BaB8O13: Bi3+ phosphors prepared by solution combustion method

Author: Lephoto, MA ; Tshabalala, KG ; Motloung, SJ ; Mhlongo, Gugu H ; Ntwaeaborwa, OM Date: Aug 2018 Undoped and bismuth (Bi(sup)3+)-doped barium octaborate (BaB(sub)8O(sub)13) powder phosphors were synthesized by solution combustion method. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, UV–visible ... Read more
Size-dependent and intra-band photoluminescence of NiS2 nano-alloys synthesized by microwave assisted hydrothermal technique

Author: Linganiso, C ; Mhlanga, SD ; Coville, NJ ; Mwakikunga, Bonex W Date: Mar 2013 Synthesis of nickel disulfide (NiS2) nano-alloys capped and uncapped with hexadecylamine (HDA) was carried out. A cubic phase NiS2 formation was confirmed by X-ray diffraction (XRD) analysis. An average crystallite size of 35 nm was obtained ... Read more
Synthesis, characterization and photoluminescence properties of Dy3+ -doped nano-crystalline SnO2

Author: Kesavan Pillai, Sreejarani ; Sikhwivhilu, LM ; Hillie, TK Date: 15 Apr 2010 Nano-crystalline of tin oxide doped with varying wt% of Dy3+ was prepared using chemical coprecipitation method and characterised by various advanced techniques such as BET-surface area, Fourier transform infrared spectroscopy, X-ray diffraction, ... Read more
Visible and IR photoluminescence of c-FeSi@a-Si core-shell nano-fibres produced by vapour transport

Author: Thabethe, S ; Linganiso, E ; Motaung, D ; Mashapa, MG ; Nkosi, S ; Arendse, CJ ; Mwakikunga, Bonex W Date: Nov 2013 The procedures for the synthesis of amorphous e-FeSi/Si core–shell nanofibres by vapour transport in a CVD configuration are reported. Crystallite studies by the Williamson-Hall method show the sizes to be typically about 8.0 nm which agrees ... Read more

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Browsing by Subject "Photoluminescence"

Browsing by Subject "Photoluminescence"

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