Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Laser Ablation

Enhancement of Silicon Solar Cell’s Performance using Plasmonic Ag Nps

N.R. Abdulhameed; H.A. Salih; K.I. Hassoon; A.K. Ali

Engineering and Technology Journal, 2017, Volume 35, Issue 1B, Pages 19-24
DOI: 10.30684/etj.35.1B.4

In this paper, Silver nanoparticles (Ag NPs) were prepared by laser ablation in liquid (PLAL) technique for different laser energy in water. Then the Ag NPs were deposited on the surface of Si solar cells to enhance their plasmonic absorption. The UV-VIS, FTIR spectrometer, and the Atomic force microscope were used to study the optical properties, composition, and the surface morphology of the NPs, respectively. The atomic absorption spectroscopy was also used to find the amount of ablated material. It is found that after the thermal deposition of the water drops containing Ag NPs on the surface of Silicon solar cells, the short circuit current and the overall conversion efficiency (η) have been improved. The short circuit current density (Jsc) has been increased by 14% after the drop overcasting of Ag NPs (about 92 nm in size) on the surface of silicon solar cells. The relative increase in Jsc may be attributed to the enhance plasmonic absorption for the incident light due to the forward scattering of Ag NPs.

Study the Effect of the Aqueous Media on the Properties of Produced Copper Nanoparticles Colloidal by Using Laser Ablation Technique

Wasan Mubdir Khilkhal; Ghaleb A. Al-Dahash; Sahib N. Abdul Wahid

Engineering and Technology Journal, 2015, Volume 33, Issue 5, Pages 830-837

This paper reports our recent studies on the generation of Cu NPs by ablation of metal targets using Q-switch Nd-YAG laser with Second Harmonic Generation(S.H.G) (λ=532nm) immersed in different aqueous media( Double Disteled Deionised Water (DDDW) and 1-Propanol) .Higher productivity and Smallest size have been produced by using 1-propanol solution compared to DDDW, which indicated that the productivity and NPs size were affected by the solution type. Optical properties measurements showed indirect optical energy gap of the produced Cu nanoparticle (3.717 and 4.887) eV , when the solution type change from DDDW to 1-Propanol respectively. The Surface topography studied by Atomic Force Microscopy, and shape were measured by using Scanning Electron Microscope SEM shows spherical shape while the composing of the prepared nanoparticle were determined by X-ray diffraction ,UV-Visible spectroscopy has been employed for the optical properties measurements.

Optical and Morphological Property of Ag Nanoparticles by Laser Ablation in Double Distilled and Deionized Water

Amenah Ali Salman

Engineering and Technology Journal, 2014, Volume 32, Issue 5, Pages 938-942

Noble metal silver NPs was synthesized by pulsed (Q-switched, 1064 nm Nd : YAG) laser ablation of silver metal plates immersed in double distilled and deionized water DDDW.
The formation efficiency of PLAL process was quantified in term of the surface Plasmon extinction SPE peaks. The SPE spectra show a sharp and single peak around 400 nm, indicating the production of pure and spherical Ag.
UV-Visible absorption results confirmed formation of silver particles prepared and atomic force microscope (AFM) indicates the size in nanometer (nm) range.

Electrical Conductivity of Carbon Nano Tubes Suspensions Prepared in Different Solutions

Mayyadah H. Mohsin; Khawla S. khashan

Engineering and Technology Journal, 2014, Volume 32, Issue 4, Pages 637-646

Carbon nanoparticle was synthesis by pulse laser ablation of graphite target in different solution. Fourier Transform Infrared Spectroscopy (FTIR), Transmission electron microscopy (TEM) and Conductivity meter were used to study chemical composition, size, morphology and condectivity of suspensions. FTIR spectra exhibit the presence of C≡C, C═C, C-C bond which indicates the formation of carbon nanoparticles. The TEM show the formation of spherical nanoparticles, aggregation of the carbon nanoparticles, morphology of carbon nanotube ((141.6 nm length and 16.6 nm diameter) in ethanol, but high-quality of CNTs in Iso-propanol with (11.1–46.15 nm) diameter and (261.1- 592.3 nm) length and the CNTs are uniform diameters in deionize water with diameters (12.2-25 nm) and (500 - 708.3 nm) length). Study the electrical condectivity; determine the activation energy of suspension and the condectivity depended on geometry of carbon nanoparticles; electrical conductivity in ethanol suspension is more than Iso-propanol suspension and the electrical conductivity of deionize water is more than them.

Effect of Experimental Parameters on the Fabrication of Silver Nanoparticles by Laser Ablation

Mohammed J. Haider; Mohammed S. Mehdi

Engineering and Technology Journal, 2014, Volume 32, Issue 4, Pages 704-709

In this work, silver nanoparticles has been prepared via ablation of pure Ag metal target in distilled water was accomplished using Q-switched Nd:YAG laser at (1.06 µm) laser wavelength , with different laser energy and number of laser pulses. The effect of these parameters on the optical and surface morphology have been studied , UV-Visible show a red shift in the absorption spectra related to the shift in the energy gap due to increment of the grain of prepared particles size is increased as laser energy. Grain size of the obtained NPs are found to increase with laser energy with rang (20-112) nm as shown by the SEM result.

Preparation of Silver and Gold Nano particles by Using Nd - YAG Pulse Laser Ablation

Abdul Qader D. Faisal; Zainab N. Jameel; Ahmed A. Moosa

Engineering and Technology Journal, 2014, Volume 32, Issue 1, Pages 138-144

Silver and gold nanoparticles were prepared by using nanosecond pulsed laser ablation. Ablation of pure metal targets (Ag and Au) for nanoparticle colloidal production was studied in de-ionized water. The optical properties were studied with Ultraviolet- Visible (UV-Vis) spectrophotometer. The spectra reveal sharp peaks due to surface plasmon absorption peaks at 405 nm and 523 nm for Ag and Au respectively. The size and shape of nanoparticles was investigated by Transmission Electron Microscope (TEM). Spherical shapes with average diameters of 10 nm and 6 nm for silver and gold nanoparticles were found respectively.