Comprehensive comparison on optical properties of samarium oxide (micro/nano) particles doped tellurite glass for optoelectronics applications

2021 ◽  
Author(s):  
M. N. Azlan ◽  
S. S. Hajer ◽  
M. K. Halimah ◽  
S. A. Umar ◽  
M. H. M. Zaid ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tellurite Glass ◽  
Nano Particles ◽  
Samarium Oxide ◽  
Comprehensive Comparison

Comprehensive Comparison on Optical Properties of Samarium Oxide (Micro/nano) Particles Doped Tellurite Glass for Optoelectronics Applications

2021 ◽  
Author(s):  
Azlan M.N ◽  
Hajer S.S ◽  
Halimah Mohamed Kamari ◽  
Umar S.A ◽  
Zaid M.H.M ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Tellurite Glass ◽  
Linear Trend ◽  
Optoelectronic Devices ◽  
Glass Network ◽  
Nano Particles ◽  
Samarium Oxide ◽  
Nano Scale ◽  
Glass Series

Abstract Rare-earth oxides microparticles doped tellurite-based glass have been studied extensively to improve the capability of optoelectronic devices. We report a detailed comparison between two sets of glass series containing samarium microparticles and nanoparticles denoted as ZBTSm-MPs and ZBTSm-NPs respectively. The two sets of glass have been successfully fabricated via melt-quenching technique with chemical formula {[(TeO2)0.70 (B2O3)0.30]0.7 (ZnO)0.3}1-y (Sm2O3 (MPs/NPs)) y with y = 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05 mol fraction. The TEM analysis confirmed the existence and formation of nanoparticles in ZBTSm-NPs glasses. The density of ZBTSm-NPs glasses was found higher than ZBTSm-MPs glasses due to the distributions of nano-scale particles in tellurite glass network. There was a linear trend of increment in the refractive index in both sets of glass series along with the concentrations of dopants. The refractive index of ZBTSm-NPs glasses was found higher than ZBTSm-MPs glasses due to the shift in compactness of glass structure with nano-scale particles. In comparison, the absorption peaks of ZBTSm-MPs glasses were greater than ZBTSm-NPs glasses which were mainly due to the restriction of electrons mobility in glass network with nano-scale particles. The optical band gap energy in ZBTSm-NPs glasses was found greater than ZBTSm-MPs glasses which correspond to the widening of forbidden gap with nano-scale particles. The polarizability of ZBTSm-NPs and ZBTSm-MPs was found in non-linear trend along with dopant concentrations. Based on these findings, the improvement of optical properties have been made by introducing samarium oxide nanoparticles in tellurite glass which is beneficial for optoelectronic devices.

scholarly journals Structural, dielectric, semiconducting and optical properties of high-energy ball milled YFeO3 nano-particles

2019 ◽  
Author(s):  
Chandra Bhal Singh ◽  
Dinesh Kumar ◽  
Narendra Kumar Verma ◽  
Akhilesh Kumar Singh
Keyword(s):  
Optical Properties ◽  
High Energy ◽  
Nano Particles ◽  
Energy Ball

The Optical Analysis and Application of Size-controllable Si Quantum Dots Fabricated by Multi-hollow Discharge Plasma Chemical Vapor Deposition

2012 ◽  
Vol 1426 ◽  
pp. 313-318
Author(s):  
Hyunwoong Seo ◽  
Yuting Wang ◽  
Giichiro Uchida ◽  
Kunihiro Kamataki ◽  
Naho Itagaki ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Quantum Effect ◽  
Visible Region ◽  
Chemical Vapor ◽  
Nano Particles ◽  
Optical Absorption Coefficient ◽  
Sensitized Solar Cells

ABSTRACTQuantum dot-sensitized solar cells (QDSCs) based on the multiple exciton generation (MEG) of QD are attractive in the field of photochemical cells because the improvement of conventional sensitized solar cells has been stagnant recently. The distinctive characteristics of QDs are their strong photo-response in the visible region and quantum confinement effects. Its theoretical efficiency is much higher than that of solar cell based on the single exciton generation (SEG). Moreover, QDs have tunable optical properties and band-gaps depending on the particle size. But QD materials widely used for QDSC have some disadvantages of toxicity and scarcity. On the other hand, Si as one of good QD materials is abundant and not toxic. Also, Si QD has high stability against light soaking and a high optical absorption coefficient due to quantum size effects. However, the research on Si QD is rare although the quantum effect of Si was already verified. It is one of reasons that the fabrication and collection of Si nano-particles are too difficult. Therefore, this work proposed multi-hollow plasma discharge chemical vapor deposition (CVD). It is possible to collect Si particles unlike conventional CVD and solve the problems of the wet process. The optical properties of Si particles were controlled by varying experimental conditions. In this work, Si particles were fabricated with various sizes and their characteristics were analyzed. Based on the results, Si QD was applied to Si QDSC.

Samarium Concentration and Optical Correlation of Tellurite Glass

2015 ◽  
Vol 1107 ◽  
pp. 443-448
Author(s):  
Sib Krishna Ghoshal ◽  
Azmirawahida Zainuddin ◽  
Ramli Arifin ◽  
M.R. Sahar ◽  
Md Supar Rohani ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tellurite Glass ◽  
Urbach Energy ◽  
Photonic Devices ◽  
Rare Earth Ions ◽  
Indirect Transition ◽  
Absorption Bands ◽  
Quenching Effect ◽  
Quenching Method ◽  
Inorganic Glasses

Modifying the structural and optical properties of inorganic glasses via controlled doping of various rare earth ions by inhibiting the quenching effect is a challenging task. We report the influence of samarium (Sm3+) ions concentration on enhanced optical properties of tellurite glass. A series of glasses with composition (0.80-x)TeO2 + 0.10Li2O + 0.10 Na2O + xSm2O3, where 0.0<x <0.03 mol% are prepared using melt quenching method and optical characterizations are performed. The XRD spectra confirm the amorphous nature of the glass. The Urbach energy decreases and the optical gap for both direcet and indirect transitions increases with the increse of samerium contents. The UV-Vis spectra comprised of eight absorption bands and PL spectra reveal four prominet peaks corresponding to various transitions from the ground state to the excited states of Sm3+ ion. The optical response shows significant enhancement with increasing concentration of samerium ions. Our detail experimental analyses may be useful for the development of tellurite glass based photonic devices. Keywords: Tellurite Glass, Sm3+ ions, Urbach Energy, Direct and Indirect Transition.

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