Wyniki wyszukiwania - Biblioteka Nauki

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Characteristics of ZnO thin films deposited by atomic layer deposition

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Boryło P. , Lukaszkowicz K. , Szindler M. , Basiaga M.

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tom Vol. 73, nr 2

86--91

EN

Purpose:The aim of this article was to examine the adhesion of ZnO thin films and the influence of temperature deposition process on their morphology. ZnO thin films have been deposited by atomic layer deposition. Design/methodology/approach: Adhesion of ZnO thin films was investigated using the scratch test method. Changes in the surface morphology were observed by scanning electron microscope (SEM). In order to confirm the chemical composition and phase investigated of thin films was carried out Energy-dispersive X-ray spectroscopy EDS and X-ray analysis. Findings: Results and their analysis have shown that the ZnO thin films deposited by ALD are uniform and homogenous. Significant impact on their morphology has the temperature of the deposition process. In the case of the adhesion temperature is negligible. Practical implications: Knowledge about the ALD ZnO thin films are possibility to obtaining a uniform thin films show that material has a big potential in optoelectronics and photovoltaic application. Originality/value: The article presents the original research results of the structure and properties of ZnO thin films deposited by ALD method, that can replace a commonly used transparent conductive layer.

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Metody badawcze cienkich warstw wytworzonych metodą osadzania warstw atomowych

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Boryło P. , Szindler M. , Szindler M. , Lukaszkowicz K.

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tom R. 24, nr 5

16--18

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Struktura i własności warstw Al₂O₃ osadzonych metodą ALD na krzemowych ogniwach fotowoltaicznych

100%

Szindler M. , Szindler M.

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2018

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tom Vol. 59, nr 9

9--11

PL

W pracy zbadano możliwości zminimalizowania współczynnika odbicia światła, a w konsekwencji zwiększenia sprawności wytwarzanych krzemowych ogniw fotowoltaicznych, poprzez wytworzenie cienkiej warstwy antyrefleksyjnej Al₂O₃ metodą atomowego osadzania warstw. Badania morfologii powierzchni warstw wykonano przy użyciu skaningowego mikroskopu elektronowego, z kolei strukturę zbadano przy użyciu dyfraktometru rentgenowskiego. W celu okreslenia własności optycznych cienkich warstw Al₂O₃ wykonano badania współczynnika odbicia światła przy użyciu spektrofotometru. Ogniwo fotowoltaiczne z osadzoną w temperaturze 300°C metodą ALD warstwą antyrefleksyjną przy zadanej liczbie cykli 830 osiągnęło sprawność 12,51%, podczas gdy sprawność ogniwa referencyjnego bez warstwy antyrefleksyjnej wyniosła 7,22%.

EN

The main goal of the study was to examine the possibility of minimizing the reflectance of light, and consequently increasing the efficiency of the produced silicon solar cells, by creating an Al₂O₃ antireflection coating by atomic layer deposition method (ALD). Surface layer morphology studies were performed by using scanning electron microscopy, while the structure was examined by using an X-ray diffractometer. In order to determine the optical properties of the Al₂O₃ thin films, light reflectance measurements were performed using a spectrophotometer. The solar cell with deposited antireflection coating by the ALD method with a 830 number of cycles at 300°C reached the efficiency of 12.51%, while the efficiency of the reference cell is 7.22%.

4

Nanodruty ZnO otrzymywane metodą Osadzania Warstw Atomowych do zastosowań sensorowych

80%

Wachnicki Ł. , Witkowski B. S. , Gierałtowska S. , Kopalko K. , Guziewicz E. , Godlewski M.

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tom Vol. 52, nr 8

85-86

PL

W pracy przedstawiamy wzrost nanodrutów ZnO metodą osadzania warstw atomowych ALD (ang. Atomic Layer Deposition). Do otrzymania nanodrutów ZnO użyto podtoże GaAs pokryte mieszaniną złota i galu uformowanego na powierzchni w postaci rozseparowanych "nanokul". W procesie ALD jako prekursor tlenowy została użyta woda dejonizowana, natomiast jako prekursor cynkowy został użyty chlorek cynku. Odpowiednio przygotowana mieszanina Au-Ga odgrywała rolę katalizatora wzrostu nanosłupków ZnO. Otrzymano nanosłupki ZnO w postaci krystalitów o długości do 1 mikrometra i około 100 nanometrów średnicy. Warto zaznaczyć, że jest to pierwsze zastosowanie metody ALD do wzrostu nanosłupków ZnO. Otrzymane nanosłupki użyto do wytworzenia czułych sensorów rozpuszczalników.

EN

In this work we present growth of ZnO nanowires (NWs) using ALD. As a substrate we used gallium arsenide with Au-Ga eutectic mixture prepared on the surface at high temperature. The soprepared substrate was used for growth of ZnO NWs using the ALD system. We used deionized water and zinc chloride as an oxygen and zinc precursors, respectively. The eutectic mixture plays a role of a catalyst for the ZnO NWs growth. The ZnO nanorods were obtained in a form of crystallites of up to 1 µm length and 100 nm diameter. It is the first demonstration of ZnO NWs growth by ALD using VLS (vapour-liquid-solid) approach. We demonstrate their application as solvents sensor.

5

Metallic skeletons as reinforcement of new composite materials applied in orthopaedics and dentistry

70%

Dobrzański L. A. , Dobrzańska-Danikiewicz A. D. , Czuba Z. P. , Dobrzański L. B. , Achtelik-Franczak A. , Malara P. , Szindler M. , Kroll L.

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tom Vol. 92, nr 2

53--85

EN

Purpose: The article concerns the development of completely new groups of composite materials that can be used to produce functional replacements for damaged bones or teeth. Design/methodology/approach: A selective laser sintering was used to produce the reinforcement of those materials from titanium and its Ti6Al4V alloy in the form of skeletons with pores with adjustable geometric features. The matrix of those materials is either air or crystallised from the liquid AlSi12 or AlSi7Mg0.3 alloys condition after prior vacuum infiltration or human osteoblast cells from the hFOB 1.19 (Human ATCC - CRL - 11372) culture line. Findings: The porous material may be used for the non-biodegradable scaffold. After implantation into the body in the form of an implant-scaffold one, it allows the natural cells of the patient to grow into the pores of the implant, and it fuses with the bone or the appropriate tissue over time. The essential part of the implant-scaffold is the porous part inseparably connected with the core of solid materials. Into pores can grow living cells. Research limitations/implications: Biological-engineering composite materials in which natural cells were cultured in the pores in the laboratory next are combined as an artificial material with the natural cells of the patient in his/her body. Practical implications: The hybrid technologies of the all group of those materials were obtained and optimised. Numerous structure research was carried out using the most modern research methods of contemporary materials engineering, and mechanical tests and biological research involving the cultivation of natural cells were realised. Originality/value: The results of the research indicate the accuracy of the idea of implementing a new group of biological-engineering materials and the wide possibilities of their application in regenerative medicine.