Peculiarities of erbium incorporation into ZnO microrods at high doping level leading to upconversion and the morphology change. Influence on excitonic as well as shallow donor states

Buryi, M.; Neyková, Neda; Ridzoňová, Katarína; Remeš, Z.; Děcká, Kateřina; Hájek, František; Artemenko, Anna; Míčová, Júlia; Landová, Lucie; Jakubec, Ivo

doi:10.1016/j.apsusc.2022.155651

Cited by 8 publications

(5 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the fact that Er presence causes the creation of the Er-bound exciton as reported in the previous work, one may expect the slowed exciton emission to be due to erbium presence itself and not to the defects. Note also that the P′3 component (see Figures and S6 in Supporting Information) discussed in Section is unique, observed only in the Er doped samples.…”

Section: Resultsmentioning

confidence: 57%

See 1 more Smart Citation

Peculiarities Related to Er Doping of ZnO Nanorods Simultaneously Grown as Particles and Vertically Arranged Arrays

Buryi,

Remeš,

Hájek

et al. 2023

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

A unique set of undoped and Er-doped ZnO nanorods that are grown by a hydrothermal method under exactly the same conditions in the form of 2D nanoarrays on the SiO2/ZnO substrate or in a free-standing form on random nucleation seeds in solution were investigated. Their optoelectronic properties are characterized by photo-, radio-, and cathodoluminescence in correlation with scanning electron microscopy, energy-dispersive X-ray spectroscopy, electron paramagnetic resonance spectroscopy, resonance Raman spectroscopy, and theoretical computing by using density functional theory. We demonstrate that erbium is incorporated at a regular zinc site in the 2D arrays and as additional nucleation seeds in the free-standing nanorods. The deposited nanorods contain a larger number of shallow donors (by about 2 orders of magnitude) and a larger number of free carriers (by about 1 order of magnitude) as compared to the free-standing ones. It is related to the fact that the nanorods grow about 1 order of magnitude larger and in polycrystalline bunches on the random seeds in solution compared to the deposited arrays. Doping by Er slows the excitonic emission from 465 to 522 ps.

show abstract

Section: Resultsmentioning

confidence: 57%

“…Moreover, the P′3 component is unique, observed only in the Er doped NRF sample. Considering the previous study on the ZnO:Er(2–30%) microrods where the existence of the Er-bound exciton was confirmed, one may expect the P′3 band to originate from the Er-bound exciton as well.…”

Section: Resultsmentioning

confidence: 90%

Peculiarities Related to Er Doping of ZnO Nanorods Simultaneously Grown as Particles and Vertically Arranged Arrays

Buryi,

Remeš,

Hájek

et al. 2023

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…We concluded, that the high temperature annealing leads to the formation of the amorphous Er2O3 phase at ZnO surface and also to the incorporation of Er into the ZnO lattice with subsequent relaxation of the charge distribution over the zinc vacancies. [10]. We have also reported that the annealing at 700 C shifts the red PL band to longer wavelengths even without the presence of Er.…”

Section: Resultsmentioning

confidence: 64%

“…The PL mean decay time was significantly faster that in the ZnO:Er annealed in air at 700C. The origin of the red emission is the neutral zinc vacancy [10]. The PL at 400 nm is related to the ultra-fast exciton emission.…”

Section: Resultsmentioning

confidence: 82%

The spectrally resolved photoluminescence decay in YAG:Er, ZnO and SiO₂ crystals

Remeš,

Buryi,

Pejchal

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

We present an optical setup for measuring spectrally resolved photoluminescence (PL) mean decay time using conventional UV LED with sinusoidal excitation and a phase shift method. The phase sensitive detection was applied on the Er-doped yttrium aluminium garnet single crystal (YAG:Er, grown by the micro-pulling-down method) and hydrothermally grown zinc oxide micro-crystallites (ZnO). Commercial ZnO and silicon oxide (SiO2) microcrystalline powders were measured for comparison. SiO2 powder was annealed in O2 plasma at 500 °C for cleaning. While YAG:Er shows well resolved greenish PL peaks with mean decay time about 15 μs related to the Stark splitting of Er3+ (4f11) states and ZnO micro-powder broad reddish PL with similar PL decay time, the plasma treated SiO2 powder shows weak bluish defect-related PL with significantly faster mean decay times below 100 ns.

show abstract

“…The observed peak at around 29.3°(labeled by *) is assigned to the (222) plane of Er 2 O 3 dopant [11,22,23,25,62,63]. Thus, during the sintering process, at 1 mol % Er 2 O 3 doping concentration, some of erbium ions might be aggregated and form a separate phase of Er 2 O 3 in the sintered pellet target.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Ahmed¹,

Imam²

2023

Phys. Scr.

View full text Add to dashboard Cite

We have studied the photocatalytic performance of ZnO, Er:ZnO, hybrid Ag/ZnO, and Ag/Er:ZnO colloidal nanoparticles (NPs) synthesized by pulsed laser ablation of stoichiometric targets and silver plate in double distilled water. The X-ray diffraction (XRD) analysis revealed the polycrystalline structure of the ablated NPs. The morphology of the nanoparticles was examined by the transmission electron microscope (TEM). The optical properties of the prepared colloidal NPs were investigated by the UV-visible absorption and photoluminescence spectroscopies. The photodegradation of the Rhodamine 6G organic dye was utilized to evaluate the photocatalytic activity of the produced colloidal NPs under illumination by UV light. The hybrid Ag/Er:ZnO colloidal NPs showed enhanced photodegradation efficiency of 96.4%, after 45 min of UV irradiation, compared to 79.7% of the pristine ZnO NPs. The obtained results point out the enhancing effect of the dopants on the photocatalytic performance of ZnO, and further demonstrate the pulsed laser ablation of bulk materials in pure water as a fast and eco-friendly technique for producing efficient nanoparticle photocatalysts.

show abstract

Peculiarities of erbium incorporation into ZnO microrods at high doping level leading to upconversion and the morphology change. Influence on excitonic as well as shallow donor states

Cited by 8 publications

References 85 publications

Peculiarities Related to Er Doping of ZnO Nanorods Simultaneously Grown as Particles and Vertically Arranged Arrays

Peculiarities Related to Er Doping of ZnO Nanorods Simultaneously Grown as Particles and Vertically Arranged Arrays

The spectrally resolved photoluminescence decay in YAG:Er, ZnO and SiO₂ crystals

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Contact Info

Product

Resources

About

Peculiarities of erbium incorporation into ZnO microrods at high doping level leading to upconversion and the morphology change. Influence on excitonic as well as shallow donor states

Cited by 8 publications

References 85 publications

Peculiarities Related to Er Doping of ZnO Nanorods Simultaneously Grown as Particles and Vertically Arranged Arrays

Peculiarities Related to Er Doping of ZnO Nanorods Simultaneously Grown as Particles and Vertically Arranged Arrays

The spectrally resolved photoluminescence decay in YAG:Er, ZnO and SiO2 crystals

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Contact Info

Product

Resources

About

The spectrally resolved photoluminescence decay in YAG:Er, ZnO and SiO₂ crystals