Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Jan B. Preinfalk"'
Autor:
Guillaume Gomard, Michael Smeets, Jan B. Preinfalk, Amos Egel, Vladimir Smirnov, Uli Lemmer, Karsten Bittkau, Yidenekachew J. Donie, Florian Lentz, Adrian Mertens
Publikováno v:
Nanoscale. 10:6651-6659
In this work, we have improved the absorption properties of thin film solar cells by introducing light trapping reflectors deposited onto self-assembled nanostructures. The latter consist of a disordered array of nanopillars and are fabricated by pol
Autor:
Jan B. Preinfalk, Valentina Rohnacher, Uli Lemmer, Thomas Wehlus, Thomas Eiselt, Thomas Hanemann, Guillaume Gomard
Publikováno v:
ACS Photonics. 4:928-933
To unleash the full potential of white organic light-emitting diodes (OLEDs) as large-area light sources, guided optical modes have to be efficiently outcoupled, which calls for internal extraction layers (IELs) that can be easily integrated into a s
Autor:
Jan B. Preinfalk, Matthias Worgull, Hendrik Hölscher, Efthymios Klampaftis, Bryce S. Richards, Guillaume Gomard, Maryna N. Kavalenka, Felix Vüllers
Publikováno v:
Small. 12:6144-6152
Inspired by the transparent hair layer on water plants Salvinia and Pistia, superhydrophobic flexible thin films, applicable as transparent coatings for optoelectronic devices, are introduced. Thin polymeric nanofur films are fabricated using a highl
Autor:
Jan B. Preinfalk, Robert Schittny, Amos Egel, Ulrich Lemmer, Frederik Mayer, Andreas Niemeyer, Martin Wegener
Publikováno v:
Advanced Optical Materials. 4:740-745
Metallic contact grids on top of large-area organic light-emitting diodes (OLEDs) are important for laterally homogenized current spreading leading to a lower series resistance and reduced large-scale brightness gradients. However, the contacts are a
Autor:
Guillaume Gomard, Jan B. Preinfalk, Uli Lemmer, Thomas Lampe, Amos Egel, Tobias D. Schmidt, Wolfgang Brütting, Fabian Schackmar
In this study, we present a simple method to tune and take advantage of microcavity effects for an increased fraction of outcoupled light in solution-processed organic light emitting diodes. This is achieved by incorporating nonscattering polymer-nan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::812c749f615db3d38322bb232ac08c6c
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/39986
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/39986
Autor:
Jan B. Preinfalk, Radwanul Hasan Siddique, Tsvetelina Merdzhanova, Amos Egel, Hendrik Hölscher, Anna Osypka, Vikas Reddy Voggu, Uli Lemmer, Yidenekachew J. Donie, Brian A. Korgel, Guillaume Gomard
Publikováno v:
Photonics for Solar Energy Systems VII.
Over the last couple of years, photonic materials with tailored -i.e. with deliberately introduced- structural disorder have attracted considerable interest in photovoltaics due to their extended spectral and angular range of effectiveness [1]. Notab
Autor:
Karsten Bittkau, Amos Egel, Yidenekachew J. Donie, Uli Lemmer, Guillaume Gomard, Jürgen Hüpkes, Matthias Hecht, Jan B. Preinfalk
Publikováno v:
Optical Nanostructures and Advanced Materials for Photovoltaics, Boulder, Colorado, 2017-11-06-2017-11-09
Light scattering OLED substrates relying on disordered self-assemblies are fabricated by microsphere and polymer blend lithography and used for light extraction. We report on a device efficiency enhancement of up to 50 %.
Publikováno v:
Optical engineering, 56 (3), 037105-1-37105-5
This work presents different polymer diffusing films for optical components. In optical applications it is sometimes important to have a film with an adjusted refractive index, scattering properties and a low surface roughness. These diffusing films
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c442862709afd4b9b033fd01307226a
Autor:
Uli Lemmer, Tobias Bocksrocker, Jan B. Preinfalk, Carsten Eschenbaum, Jörg Hoffmann, Florian Maier-Flaig, Andreas Pargner
Publikováno v:
Organic Electronics. 14:396-401
We demonstrate a method to increase the efficiency of white organic light emitting diodes (WOLEDs) by a factor of up to 3.7. By fabricating the WOLED on top of a monolayer of SiO2-microspheres we texture the WOLEDs spherically. We attribute the signi
Autor:
Jan B. Preinfalk, Uli Lemmer, Thomas Hanemann, Thomas Eiselt, Guillaume Gomard, Uwe Gleissner
Publikováno v:
Micro-Optics 2016.
The aim is to develop a polymer layer which has the ability to diffuse light homogeneously and exhibit a high refractive index. The mixtures are containing an acrylate casting resin, benzylmethacrylate, phenanthrene and other additives. Phenanthrene