Energy Transfer from Silicon Nanocrystals to Er3+ Ions Embedded in Silicon Oxide Matrix

Pita, K.

doi:10.5772/17490

Cited by 3 publications

(4 citation statements)

References 25 publications

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“…The absence of an emission peak in bulk semiconductor material is due to coupling of the emitting states with lattice vibrations of the extended lattice and is due to a number of dangling bonds which provide traps for nonradiative recombination. 72 Bol and Meijerink 73 observed that a higher degree of polymerization can lead to better surface coverage and can reduce the number of dangling bonds on the surface of NPs, thereby increasing the PL emission. The surfactants are therefore believed to eliminate the surface traps caused by dangling bonds and hence help in maintaining better PL emission.…”

Section: Pl Emissionmentioning

confidence: 99%

The critical role of surfactants towards CdS nanoparticles: synthesis, stability, optical and PL emission properties

2013

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a Cadmium sulfide (CdS) nanoparticles (NPs), prepared by a convenient chemical precipitation method, have been characterized using techniques such as TEM, XRD, zeta potential, absorption and photoluminescence (PL) emission spectroscopy to establish the structure directing role of different cationic and anionic surfactants and their impact on the nanoparticles stabilization. In the synthesis of the CdS NPs, cadmium acetate and sodium sulfide, employed as starting reagents, were dissolved in aqueous solutions of different surfactants to study the effect of their structures on the nucleation, growth, optical and PL emission properties of the NPs. By varying the surfactant species, the CdS NPs have significantly different optical and PL emission properties despite being produced under similar reaction conditions. Depending on the surfactant structure, the growing CdS NPs were stabilized by the surfactants to different extents.For example, in the surfactant with the longest chain length (e.g. cetyltrimethylammonium bromide; CTAB), the CdS NPs were most stable, whereas using a surfactant with a smaller chain length i.e. DTAB, the NPs were unstable for even 1 h. On the other hand, anionic surfactants of even smaller chain lengths were able to stabilize the CdS NPs for quite long times. The generalized study of growth of spherical CdS NPs involves monitoring the kinetics during the progress of the reaction. Additionally, an interesting prominent effect of surfactant structure on the PL emission properties of the NPs has been established under identical reaction conditions.

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Section: Pl Emissionmentioning

confidence: 99%

The critical role of surfactants towards CdS nanoparticles: synthesis, stability, optical and PL emission properties

2013

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“…Firstly, the increase of Sn concentration reduces the crystallinity of ZTO, as shown in Fig. 2, and atomic disorder in an amorphous compound can produce the defect states causing non-radiative recombination [30,31]. Similarly, Karmakar et al reported that the disorder introduced in a Mn-doped ZnO thin film led to the decrease of crystallinity and PL intensity [30].…”

Section: Effect Of Zto Compositionmentioning

confidence: 97%

Yb-doped zinc tin oxide thin film and its application to Cu(InGa)Se2 solar cells

Park

Ferblantier

Slaoui

et al. 2020

Journal of Alloys and Compounds

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…Interestingly, the nature of these defect emission centers was not reported by Savchyn et al [80,83]. This ambiguity where the energy transfer from the Si-nc to Er 3+ could be due either to the excitonic emissions or the defect emissions, has been further studied to some extent by studies in reference [81]. The study shows that the exciton recombination in Si-nc show higher energy transfer as compared to the defect medicated energy transfer.…”

Section: 321mentioning

confidence: 94%

“…al., it was reported that the emission from the silicon nanocrystal at 810 nm excites the Er 3+ , which in turn gives its characteristic emission at 1540 nm. Since then, there has been many reports on the study of energy transfer from Si-nc to Er 3+ ions [75][76][77][78][79][80][81]and other lanthanide ions like Nd 3+ , Tm 3+ and Yb 3+ [82]. The main aim of these studies initially was to create an efficient silicon based light emitting device [82].…”

Section: 321mentioning

confidence: 99%

Efficient energy transfer from zinc oxide nanocrystals to europium (3+) and terbium (3+) ions embedded in an oxide matrix

Mangalam¹

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Energy Transfer from Silicon Nanocrystals to Er3+ Ions Embedded in Silicon Oxide Matrix

Cited by 3 publications

References 25 publications

The critical role of surfactants towards CdS nanoparticles: synthesis, stability, optical and PL emission properties

The critical role of surfactants towards CdS nanoparticles: synthesis, stability, optical and PL emission properties

Yb-doped zinc tin oxide thin film and its application to Cu(InGa)Se2 solar cells

Efficient energy transfer from zinc oxide nanocrystals to europium (3+) and terbium (3+) ions embedded in an oxide matrix

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