Enhanced luminescence from silver nanoparticles integrated Er3+-doped boro-tellurite glasses: Impact of annealing temperature

Mahraz, Zahra Ashur Said; Sahar, Md. Rahim; Ghoshal, Sib Krishna

doi:10.1016/j.jallcom.2015.07.232

Cited by 56 publications

(12 citation statements)

References 45 publications

(40 reference statements)

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“…The more significant value of GBW can infer that the complexity of the designed glass composition proposed in this work can contribute to the application of optical amplification [21]. [39] had reported that Judd-Ofelt theory is used to identify the spectroscopic parameters from absorption spectra. [46] had mentioned that the absorption spectra could be utilized to determine the radiative transition probabilities, branching ratio and a radiative lifetime of different transitions particularly by using Judd-Ofelt theory.…”

Section: Spectroscopic Parameters Under Mccumber Theorymentioning

confidence: 94%

“…Figure 9: Energy level diagram of silver-doped erbium zinc tellurite glasses for visible emission Figure 9 displays the energy level diagram of the silver-doped erbium zinc tellurite glass system [38][39]. In 2016, Mahraz and other co-authors [40] had revealed that the excited states at 4 F 3/2, 4 F 9/2 and 4 I 9/2 had filled by the cooperative energy transfer (CET) between two erbium ions that exist in the existing glass system.…”

Section: Energy Level Diagram Analysismentioning

confidence: 99%

“…It is reversible to the covalence of the erbium oxide bond. and Mahraz et al, (2015) [39,57] had reported that Ω 2 is sensitive to the asymmetry in the region of the rare-earth ions (short-range effect). On the other hand, the differences in Ω 4 and Ω 6 are interrelated to the long-range effect of the glass host.…”

Section: Judd-ofelt Analysismentioning

confidence: 99%

“…The increase of this parameter will cause the lower symmetry in the structural coordination surrounding the erbium ions. The increment of this parameter can increase in covalence, socalled a nephelauxetic shift at the rare-earth sites [37,39].…”

Section: Judd-ofelt Analysismentioning

confidence: 99%

“…This will enhance the broadening of the emission band. The rigidity of the host glass indicated by the Ω 6 will be higher as a result of the presence of silver oxide within the glass network [39].…”

Section: Judd-ofelt Analysismentioning

confidence: 99%

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Zinc Tellurite Glass System Incorporated with Erbium Oxide and Silver Oxide as Ultra-Broad (S+C+L) Bands Optical Communication

Nazrin

Halimah

Yee

et al. 2022

Preprint

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Melt-quenching method was used to synthesize a series of zinc tellurite glasses doped with erbium oxide and silver oxide. At room temperature, X-ray diffraction (XRD) and density measurement were implemented to characterize the prepared glass samples. The amorphous nature of the glass samples is proven from the XRD spectra obtained in this work. The density of the glass showed an increment trend from 4.4673 to 4.9705 g/cm3 when adding more silver oxide, which can prove that the glass strength is higher. For photoluminescence analysis, blue, green and red emissions were found in the glass series under 375 nm excitation wavelength. According to McCumber theory, higher emission cross-section and higher FWHM are efficient for both broadband amplifier and laser application. More extensive and flatter gain with a maximum gain difference has covered both C and L bands for optical communication, providing a few channels in the wavelength division multiplex network (WDM). The high efficiency of optical amplification is justified with a higher gain figure of merit and larger gain bandwidth. According to McCumber’s theory, all the results proved that 0.03 molar fraction of silver oxide is the most optimum concentration to be applied in the optical application. In Judd-Ofelt analysis, spectroscopic quality factor and shorter lifetime is a crucial parameter for obtaining intense laser transition, strong emission probabilities and encouraging the laser optical transition, which was successfully attained in all glass samples. The present glass system is also applicable for white light application since the standard equal energy point from all glass samples were located near the center of the CIE diagram (0.33, 0.33). In the meantime, higher values of CCT range from 6761 to 6937 K produce light with a better image as compared to lower CCT. Higher CCT is commercially used in LCD (liquid crystal display) and CRT (cathode ray tube) screens. The colour purity is a parameter for better white LED application, whereas low colour purity is for pure white light emission. Therefore, lower colour purity was found around 10.7 around 18.8% in all glass samples.

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Section: Spectroscopic Parameters Under Mccumber Theorymentioning

confidence: 94%

Section: Energy Level Diagram Analysismentioning

confidence: 99%