The effect of different gas atmospheres on luminescent properties of pulsed laser ablated SrAl2O4:Eu2+,Dy3+ thinfilms

Nsimama, P. D.; Ntwaeaborwa, O.M.; Swart, H.C.

doi:10.1016/j.jlumin.2010.09.034

Cited by 22 publications

(7 citation statements)

References 33 publications

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“…As it can be observed, all the films gave amorphous structures. This result is similar to those reported elsewhere [4,[15][16][17], where amorphous structures were obtained for the films deposited at similar temperature ranges. Figure 4 shows the variation of PL intensity with the substrate temperature while fixing all other parameters.…”

Section: Sem Resultssupporting

confidence: 92%

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Characterization of Laser Ablated SrAl2O4:Eu2+, Dy3+ Thin Films Deposited on the Optimum Substrate Temperature Range

Nsimama¹

2018

AJOP

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The morphological, structural and photoluminescence (PL) of laser ablated SrAl 2 O 4 :Eu 2+ , Dy 3+ thin films deposited on optimum substrate temperature range of 200-500°C are reported. The 200-500°C substrate temperature was considered, since on that range, low cost highly emitting SrAl 2 O 4 :Eu 2+ , Dy 3+ thin films are always produced. The surface morphology analysis of the films was done by using the scanning electron microscopy (SEM) and atomic force microscopy (AFM). The energy dispersive X-ray spectrometer (EDS) was employed for elemental composition analysis. The structural analysis was done by the X-ray diffraction (XRD) technique. The photoluminescence (PL) data collection was done by using Cary Eclipse fluorescence spectrophotometry. The films were excited by the UV light from the xenon lamp. The highest green emission intensity with a peak at 517 nm and highest initial afterglow intensity were recorded by the sample that was deposited at 350°C. The green peak at 517 nm is attributed to 4f 6 5d 1 → 4f 7 Eu 2+ transitions. AFM images with well defined grains were observed on the films deposited at temperatures higher than 200°C. The EDS elemental composition analysis showed that the films consist of all the main elements of SrAl 2 O 4 :Eu 2+ , Dy 3+ , i.e., Al, Sr, O. The changes in the film photoluminescence and morphology with the substrate temperature are discussed.

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Section: Sem Resultssupporting

confidence: 92%

“…Surprisingly, the film deposited at 200°C gave a higher red peak than a green one. The 619 Eu 3+ peak has been reported in our previous work and has been associated with the low laser fluencies [17]. In the same figure, the excitation spectrum is also shown with a peak at 330 nm, which was the excitation wavelength of the films.…”

Section: Sem Resultssupporting

confidence: 77%

Characterization of Laser Ablated SrAl2O4:Eu2+, Dy3+ Thin Films Deposited on the Optimum Substrate Temperature Range

Nsimama¹

2018

AJOP

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“…[22][23][24] However, the films produced by the PLD method show better luminescence quantum yield. [22][23][24] However, the films produced by the PLD method show better luminescence quantum yield.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Other possible alternative technologies include the radio frequency sputtering method and the ion beam evaporation (IBE) technique . However, the films produced by the PLD method show better luminescence quantum yield . In the present study, a rapid and highly reproducible PLD technique, which can maintain the same original chemical composition and element valence as the original target, is employed to prepare a SAED scaffold layer on a compact TiO 2 (cp‐TiO 2 ) electron transport layer for PSC application.…”

Section: Introductionmentioning

confidence: 99%

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Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Chen

Jin

et al. 2017

Advanced Energy Materials

127

118

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Recently, considerable progress is achieved in lab prototype perovskite solar cells (PSCs); however, the stability of outdoor applications of PSCs remains a challenge due to the high sensitivity of perovskite material under moist and ultraviolet (UV) light conditions. In this work, the UV photostability of PSC devices is improved by incorporating a photon downshifting layer—SrAl2O4: Eu2+, Dy3+ (SAED)—prepared using the pulsed laser deposition approach. Light‐induced deep trap states in the photoactive layer are depressed, and UV light‐induced device degradation is inhibited after the SAED modification. Optimized power conversion efficiency (PCE) of 17.8% is obtained through the enhanced light harvesting and reduced carrier recombination provided by SAED. More importantly, a solar energy storage effect due to the long‐persistent luminescence of SAED is obtained after light illumination is turned off. The introduction of downconverting material with long‐persistent luminescence in PSCs not only represents a new strategy to improve PCE and light stability by photoconversion from UV to visible light but also provides a new paradigm for solar energy storage.

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Luminescence Properties of Rare-Earth-Doped CaO Phosphors

Mushtaq¹,

Ayoub²,

Hussain³

et al. 2023

Progress in Optical Science and Photonics

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The effect of different gas atmospheres on luminescent properties of pulsed laser ablated SrAl2O4:Eu2+,Dy3+ thinfilms

Cited by 22 publications

References 33 publications

Characterization of Laser Ablated SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>, Dy<sup>3+</sup> Thin Films Deposited on the Optimum Substrate Temperature Range

Characterization of Laser Ablated SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>, Dy<sup>3+</sup> Thin Films Deposited on the Optimum Substrate Temperature Range

Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Luminescence Properties of Rare-Earth-Doped CaO Phosphors

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The effect of different gas atmospheres on luminescent properties of pulsed laser ablated SrAl2O4:Eu2+,Dy3+ thinfilms

Cited by 22 publications

References 33 publications

Characterization of Laser Ablated SrAl&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;:Eu&lt;sup&gt;2+&lt;/sup&gt;, Dy&lt;sup&gt;3+&lt;/sup&gt; Thin Films Deposited on the Optimum Substrate Temperature Range

Characterization of Laser Ablated SrAl&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;:Eu&lt;sup&gt;2+&lt;/sup&gt;, Dy&lt;sup&gt;3+&lt;/sup&gt; Thin Films Deposited on the Optimum Substrate Temperature Range

Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Luminescence Properties of Rare-Earth-Doped CaO Phosphors

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Characterization of Laser Ablated SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>, Dy<sup>3+</sup> Thin Films Deposited on the Optimum Substrate Temperature Range

Characterization of Laser Ablated SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>, Dy<sup>3+</sup> Thin Films Deposited on the Optimum Substrate Temperature Range