Effect of lithium and silver diffusion in single-stack and tandem OLED devices

A low-fired NiCuZn-ferrite and a new LTCC dielectric material with matched sintering shrinkages and coefficients of thermal expansion were used for integration of magnetic function into LTCC. Silver was used as inner conductor material. Silver diffusion during sintering into the surrounding glassy phase modifies the sintering behaviour of LTCC near the silver conductor and generates warping and delamination of the multilayer. Silver diffusion can be prevented by sintering in nitrogen atmosphere. However, sintering in nitrogen atmosphere causes partial decomposition of NiCuZn-ferrite by reduction of divalent copper oxide (CuO) to cuprite (Cu2O). It was found that diffusion of silver and associated deformation can be highly reduced if a higher heating rate during sintering in air is used. A Defect-free multilayer transformer with several silver conductive layers could be manufactured by pressure-assisted sintering only.

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The Effect of Silver Diffusion Process for C-Axis Aligned Bi-2223

Advances in Superconductivity IX ◽

10.1007/978-4-431-68473-2_60 ◽

1997 ◽

pp. 899-902

Author(s):

Kenji Kawasaki ◽

Hiroshi Ikeda ◽

Ryozo Yoshizaki ◽

Tsuneaki Matsudaira ◽

Kozo Yoshikawa

Keyword(s):

Diffusion Process ◽

Silver Diffusion

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Fabrication of Ag-modified hollow titania spheres via controlled silver diffusion in Ag–TiO2 core–shell nanostructures

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.11.12 ◽

2020 ◽

Vol 11 ◽

pp. 141-146 ◽

Cited By ~ 1

Author(s):

Bartosz Bartosewicz ◽

Malwina Liszewska ◽

Bogusław Budner ◽

Marta Michalska-Domańska ◽

Krzysztof Kopczyński ◽

...

Keyword(s):

Optical Properties ◽

Photoelectron Spectroscopy ◽

Sol Gel ◽

Hollow Spheres ◽

Good Control ◽

Structural Features ◽

Noble Metal Nanoparticles ◽

Simple Method ◽

Vis Spectroscopy ◽

Silver Diffusion

Inorganic hollow spheres find a growing number of applications in many fields, including catalysis and solar cells. Hence, a simple fabrication method with a low number of simple steps is desired, which would allow for good control over the structural features and physicochemical properties of titania hollow spheres modified with noble metal nanoparticles. A simple method employing sol–gel coating of nanoparticles with titania followed by controlled silver diffusion was developed and applied for the synthesis of Ag-modified hollow TiO2 spheres. The morphology of the synthesized structures and their chemical composition was investigated using SEM and X-ray photoelectron spectroscopy, respectively. The optical properties of the synthesized structures were characterized using UV–vis spectroscopy. Ag–TiO2 hollow nanostructures with different optical properties were prepared simply by a change of the annealing time in the last fabrication step. The synthesized nanostructures exhibit a broadband optical absorption in the UV–vis range.

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