Structural, optical and electrical properties of undoped and doped (Al, Al + Mn) ZnO nanoparticles synthesised by green combustion method using terminalia catappa seed extract

2022 ◽  
Author(s):  
D. Savitha ◽  
H.K.E. Latha ◽  
H.S. Lalithamba ◽  
S. Mala ◽  
Yogananda Vasudev Jeppu
Keyword(s):  
Electrical Properties ◽  
Zno Nanoparticles ◽  
Combustion Method ◽  
Seed Extract ◽  
Optical And Electrical Properties ◽  
Terminalia Catappa

scholarly journals Influence of the La3+, Eu3+, and Er3+ Doping on Structural, Optical, and Electrical Properties of BiFeO3 Nanoparticles Synthesized by Microwave-Assisted Solution Combustion Method

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Angelika Wrzesinska ◽  
Alexander Khort ◽  
Izabela Bobowska ◽  
Adam Busiakiewicz ◽  
Aleksandra Wypych-Puszkarz
Keyword(s):  
Rare Earth ◽  
Electrical Properties ◽  
Bismuth Ferrite ◽  
Solution Combustion Synthesis ◽  
Combustion Method ◽  
Band Gap Energy ◽  
Rare Earth Doping ◽  
Optical And Electrical Properties ◽  
Solution Combustion ◽  
Microwave Assisted

In this study, nanocrystalline (18–28 nm) perovskite-like bismuth ferrite rare earth-doped powders (Bi0.9RE0.1FeO3, where RE = La (BLaFO), Eu (BEuFO), and Er (BErFO)) were obtained by microwave-assisted modification of solution combustion synthesis (SCS). The influence of high load La3+, Eu3+, and Er3+ doping on structural, optical, and electrical properties of BiFeO3 was investigated. It was found that rare earth doping along with fast phase formation and quenching significantly distorts the crystal cells of the obtained materials, which results in the formation of mixed rhombohedral- (R3c-) orthorhombic (Pbnm) crystal structures with decreased lengths of Bi-O and Fe-O bonds along with a decreasing radius size of doping ions. This promotes reduction of the optical band gap energy and suppression of ionic polarization at high frequencies and results in enhanced dielectric permittivity of the materials at 1 MHz.

scholarly journals Influence of Drying Temperature on the Structural, Optical, and Electrical Properties of Layer-by-Layer ZnO Nanoparticles Seeded Catalyst

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
S. S. Shariffudin ◽  
M. H. Mamat ◽  
S. H. Herman ◽  
M. Rusop
Keyword(s):  
Grain Size ◽  
Electrical Properties ◽  
Zno Nanoparticles ◽  
Sol Gel ◽  
Visible Emission ◽  
Visible Range ◽  
Layer By Layer ◽  
Optical And Electrical Properties ◽  
Ultraviolet Emission ◽  
Drying Temperature

Layer-by-layer zinc oxide (ZnO) nanoparticles have been prepared using sol-gel spin coating technique. The films were dried at different temperature from 100°C to 300°C to study its effect to the surface morphology, optical and electrical properties of the films. Film dried at 200°C shows the highest (0 0 2) peak of X-ray diffraction pattern which is due to complete decomposition of zinc acetate and complete vaporization of the stabilizer and solvent. It was found that the grain size increased with the increased of drying temperature from 100 to 200°C, but for films dried at above 200°C, the grain size decreased. Photoluminescence measurements show a sharp ultraviolet emission centred at 380 nm and a very low intensity visible emission. Blue visible emission was detected for sample dried at temperature below 200°C, while for films dried above 250°C, the visible emission is red shifted. The films were transparent in the visible range from 400 to 800 nm with average transmittance of above 85%. LinearI-Vcharacteristics were shown confirming the ohmic behaviour of the gold contacts to the films. A minimum resistivity was given by 5.08 Ω · cm for the film dried at 300°C.

Sign in / Sign up

Export Citation Format

Share Document