Ion-doped mesoporous bioactive glass: preparation, characterization, and applications using the spray pyrolysis method

Bioactive glasses (BAG) are one type of biomaterial that is used in dentistry and orthopedics to repair or replace damaged bone. The spray pyrolysis process is low-cost and one of the most common ways for producing porous films and films with high-density packing and particle homogeneity.

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Control of Dopant Distribution in Yttrium-Doped Bioactive Glass for Selective Internal Radiotherapy Applications Using Spray Pyrolysis

Materials ◽

10.3390/ma12060986 ◽

2019 ◽

Vol 12 (6) ◽

pp. 986 ◽

Cited By ~ 3

Author(s):

Abadi Hadush Tesfay ◽

Yu-Jen Chou ◽

Cheng-Yan Tan ◽

Fetene Fufa Bakare ◽

Nien-Ti Tsou ◽

...

Keyword(s):

Bioactive Glass ◽

Spray Pyrolysis ◽

Spray Pyrolysis Method ◽

Dopant Distribution ◽

Local Distribution ◽

Selective Internal Radiotherapy ◽

Internal Radiotherapy ◽

Surface Areas ◽

Pyrolysis Method ◽

Long Duration

In this study, we demonstrate the fabrication of Y-doped bioactive glass (BG), which is proposed as a potential material for selective internal radiotherapy applications. Owing to its superior bioactivity and biodegradability, it overcomes the problem of yttrium aluminosilicate spheres that remain in the host body for a long duration after treatment. The preparation of Y-doped BG powders were carried out using a spray pyrolysis method. By using two different yttrium sources, we examine the change of the local distribution of yttrium concentration. In addition, characterizations of phase information, particle morphologies, surface areas, and bioactivity were also performed. The results show that both Y-doped BG powders are bioactive and the local Y distribution can be controlled.

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Numerical investigations of the impact of buffer germanium composition and low cost fabrication of Cu2O on AZO/ZnGeO/Cu2O solar cell performances

EPJ Photovoltaics ◽

10.1051/epjpv/2021003 ◽

2021 ◽

Vol 12 ◽

pp. 3

Author(s):

Christyves Chevallier ◽

Sourav Bose ◽

Sidi Ould Saad Hamady ◽

Nicolas Fressengeas

Keyword(s):

Solar Cell ◽

Spray Pyrolysis ◽

Cell Model ◽

Low Cost ◽

Absorber Layer ◽

Physical Parameters ◽

Pyrolysis Process ◽

Cell Efficiency ◽

Spray Pyrolysis Process ◽

The Impact

Numerical simulations of AZO/Zn1−xGexO/Cu2O solar cell are performed in order to model for the first time the impact of the germanium composition of the ZnGeO buffer layer on the photovoltaic conversion efficiency. The physical parameters of the model are chosen with special care to match literature experimental measurements or are interpolated using the values from binary metal oxides in the case of the new Zn1−xGexO compound. The solar cell model accuracy is then confirmed thanks to the comparison of its predictions with measurements from the literature that were done on experimental devices obtained by thermal oxidation. This validation of the AZO/Zn1−xGexO/Cu2O model then allows to study the impact of the use of the low cost, environmental friendly and industrially compatible spray pyrolysis process on the solar cell efficiency. To that aim, the Cu2O absorber layer parameters are adjusted to typical values obtained by the spray pyrolysis process by selecting state of the art experimental data. The analysis of the impact of the absorber layer thickness, the carrier mobility, the defect and doping concentration on the solar cell performances allows to draw guidelines for ZnGeO/Cu2O thin film photovoltaic device realization through spray pyrolysis.

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