Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: osadzanie laserowe

Sortuj według:

Ogranicz wyniki do:

Pulsed laser deposition of ZnO and MoO3 as reflection prohibitors on photovoltaic cell substrate to enhance the efficiency

Selvan P., Jebaraj D. J. J., Hynes N. R. J.

Journal of Achievements in Materials and Manufacturing Engineering

2022

Vol. 113, nr 2

65--71

Purpose: With the ever-growing demand for conventional fuels, the improvement in the efficiency of the photovoltaic system is the need of the hour. Antireflection coatings enhance the availability of solar power by reducing the percentage of light reflected. A new coating has been developed to improve the solar cell's overall efficiency. This study focuses on enhancing the efficiency of the monocrystalline solar cell when a coating of ZnO-MoO3 is applied at a certain thickness. Design/methodology/approach: A layer of ZnO followed by MoO3 is deposited on a Silicon solar cell substrate using a Pulsed Laser Deposition process. Due to the transmissivity d between the two materials, they act as excellent antireflection coating. The layer thickness has been engineered to lie in the maximum absorption spectrum of monocrystalline silicon solar cells, which is between 400 and 800 nanometers. Findings: Based on the calculation of transmissivities for a given layer thickness of coating material, the coating has been done, and the efficiencies of the coated specimen were compared with the uncoated solar cell. The percentage improvement in the electrical efficiency of a single crystalline silicon solar cell with an anti-reflection coating at 1059 W/m2 is about 35.7%. Research limitations/implications: Among the available antireflection coating materials, the combination that provides better efficiency when coated on top of a solar cell is hard to find. Practical implications: This anti-reflection coating could be a better solution to enhance the overall efficiency of the single crystalline silicon solar cell. Originality/value: Although ZnO and MoO3 coatings have been investigated separately for improvement in solar cell efficiency with varying levels of success, the hybrid coating of ZnO/MoO3 with a performance enhancement of 35.7% is a great leap.

Wavelet analysis of time-of-flight ion mass spectrometry signals

Rumianowski R., Józefczyk I.

Problemy Eksploatacji

2016

no. 4

119--126

The problem of deposition of thin layers on non-layer substrates occupies a special place in modem materials technology. One of the fast-growing methods is laser ablation involving the evaporation of materiał by the laser pulse, thereby forming a plasma cloud, which is then deposited on the substrate. The basie method of diagnostics of plasma cloud is a mass spectrometer. The paper has presented the physical bases of the operation time of flight mass spectrometer and the theoretical models of signal received from the spectrometer. In the experimental part, the spectrum obtained for Pb2 lead particles that were then subjected to wavelet analysis is presented, thanks to which we have received additional information about the composition of the plasma cloud and about any other isotopes. The paper is an introduction to further research on the use of wavelet transform in spectroscopic analysis.

We współczesnej technologii materiałowej szczególne miejsce zajmuje zagadnienie osadzania cienkich warstw na innych niż warstwa podłożach. Jedną z szybko rozwijających się metod jest ablacja laserowa polegająca na odparowaniu impulsem lasera materiału, w wyniku czego powstaje obłok plazmy, który jest następnie osadzany na podłożu. Podstawową metodą diagnostyki obłoku plazmy jest spektrometr masowy. W pracy przedstawiono podstawy fizyczne działania spektrometru masowego czasu przelotu oraz teoretyczne modele sygnału otrzymywanego ze spektrometru. W części doświadczalnej zaprezentowano widmo otrzymane dla cząsteczki ołowiu Pb2, które następnie poddano analizie falkowej, dzięki czemu otrzymano dodatkowe informacje o składzie obłoku plazmy. Praca jest wstępem do dalszych badań nad zastosowaniem transformaty f alkowej w analizie spektroskopowej.