Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Andreas Weimar"'
Autor:
Anne Bingel, Daniel Messroghli, Andreas Weimar, Kilian Runte, Maximilian Salcher-Konrad, Sebastian Kelle, Burkert Pieske, Felix Berger, Titus Kuehne, Leonid Goubergrits, Daniel Fuerstenau, Marcus Kelm
Publikováno v:
Frontiers in Cardiovascular Medicine, Vol 9 (2022)
Although disease etiologies differ, heart failure patients with preserved and reduced ejection fraction (HFpEF and HFrEF, respectively) both present with clinical symptoms when under stress and impaired exercise capacity. The extent to which the adap
Externí odkaz:
https://doaj.org/article/6be771813e374bee9ed8570d9db49080
Publikováno v:
Journal of Materials Science and Chemical Engineering. :31-38
In this investigation, the influence of a thin gold (Au) layer on the growth behavior of the intermetallic compound (IMC) in a Nickel-Tin-Solder (NiSn-Solder) was studied. The reaction kinetics was studied in the temperature range of 232℃ to 330℃
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e8544e460770615dc40074f61b1e95f
https://doi.org/10.4236/msce.2016.44004
https://doi.org/10.4236/msce.2016.44004
Publikováno v:
Journal of Materials Science and Chemical Engineering. :116-130
The reaction between high purity nickel (99.999%) and high purity tin (99.999%) was investigated in the temperature range of 232℃ - 330℃, at short periods of annealing (1 - 60 s). The reaction kinetic was studied using cross-sectional scanning el
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ece00f5dbe62bf0e37614b6a67564fe8
https://doi.org/10.4236/msce.2016.42013
https://doi.org/10.4236/msce.2016.42013
Publikováno v:
physica status solidi (a). 217:2070060
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ecfbd5d6daec374b70751b0c65d0498
https://doi.org/10.1002/pssa.202070060
https://doi.org/10.1002/pssa.202070060
Publikováno v:
RIULL. Repositorio Institucional de la Universidad de La Laguna
Universidad de La Laguna (ULL)
Universidad de La Laguna (ULL)
Etching of gallium nitride is a key step in the production of blue and white light-emitting diodes (LEDs). Etching in aqueous KOH solution creates a rough surface on the LED chip to facilitate outcoupling of the photons generated, drastically increas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::589d07d3b852c6675852617a76cd92b0
https://doi.org/10.1002/pssa.202000221
https://doi.org/10.1002/pssa.202000221
Autor:
Robert Walter, M. Al-Suleiman, Martin Strassburg, Hans-Jürgen Lugauer, Arne Behrends, Andreas Weimar, Alexander Wagner, Andrey Bakin, Andreas Waag
Publikováno v:
physica status solidi (a). 209:708-713
Transparent conductive oxides (TCOs) are used for a variety of different applications, e.g., in solar cells and light emitting diodes (LEDs). Mostly, sputtering is used, which often results in a degradation of the underlying semiconductor material. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cbff62236a4a895ef7221bf03f66eaa
https://doi.org/10.1002/pssa.201127324
https://doi.org/10.1002/pssa.201127324
Autor:
Andreas Weimar, Tony Albrecht
Publikováno v:
Optik & Photonik. 5:24-27
LED (Light Emitting Diodes) werden in zunehmend mehr Anwendungsbereichen als Lichtquelle eingesetzt. Hauptgrund ist die rasante Entwicklung der Effizienz, mit der elektrischer Strom in nutzbares Licht umgewandelt wird. LED verbrauchen weniger Strom a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f757e50c4a83ee561ed1f7a9f947cdd
https://doi.org/10.1002/opph.201190115
https://doi.org/10.1002/opph.201190115
Autor:
Wilfried Pletschen, F. Sommer, Volker Härle, Michael Kunzer, Klaus Köhler, P. Schlotter, Joachim Wagner, F. Vollrath, Stefan Müller, Andreas Weimar
Publikováno v:
physica status solidi (c). 2:2849-2853
We compare the electro-optical characteristics of violet-emitting ridge waveguide (AlGaIn)N quantum well diode lasers with etched laser facets, grown on GaN templates with a homogeneously reduced defect density, with those of reference devices grown
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b57254f6dc4090b7ec8994e4c2950a28
https://doi.org/10.1002/pssc.200461453
https://doi.org/10.1002/pssc.200461453
Autor:
Dominik Eisert, Volker Haerle, Stephan Kaiser, Franz Eberhard, Berthold Hahn, Stefan Bader, Andreas Weimar, Andreas Plössl
Publikováno v:
phys. stat. sol. (a). 201:2736-2739
During the last years GaN-technology has proven to fulfill the requirements of solid state lighting. Lighting requirements are mainly driven by brightness, operation voltage and lifetime. Brigthness is determined by internal efficiency as well as ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1fd990b8d1dd81dbc5ab39c65eac917
https://doi.org/10.1002/pssa.200405119
https://doi.org/10.1002/pssa.200405119
Autor:
Andreas Weimar, Nikolaus Gmeinwieser, Alfred Lell, Stephan Miller, Werner Wegscheider, Ulrich T. Schwarz, Volker Härle, Karl Engl, Andreas Leber, Josef Zweck
Publikováno v:
phys. stat. sol. (a). 201:2760-2763
We investigate the epitaxial lateral overgrowth (ELOG) process on silicon carbide (SiC) to obtain defect reduced gallium nitride (GaN). The large wing tilt of about 4 degrees causes bunches of edge dislocations above the edge of the ELOG mask. The PL
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d53e7f10c02555883cc5d0c2b3e50c1
https://doi.org/10.1002/pssa.200404998
https://doi.org/10.1002/pssa.200404998