Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Johannes Gutmann"'
Irgendetwas scheint mit unserer Wirtschaft nicht zu stimmen. Sie macht wenige Reiche immer reicher, während sie den Rest der Menschheit unter wachsenden Druck setzt. Sie fördert Pandemien und zerstört den Planeten. Aber wo sind die Alternativen? W
Autor:
Clarissa L. M. Hofmann, Johannes Gutmann, B. Herter, Jan Christoph Goldschmidt, Stefan Fischer
In this paper, we present a comprehensive simulation-based analysis of the two photonic effects of a Bragg stack - a modified local density of photon states (LDOS) and an enhanced local irradiance - on the upconversion (UC) luminescence and quantum y
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9442e8886d7564694a36fca840889685
https://publica.fraunhofer.de/handle/publica/245064
https://publica.fraunhofer.de/handle/publica/245064
Publikováno v:
Procedia Chemistry. 1:532-535
Accurate positioning becomes extremely important for modern application like indoor navigation and location-based services. Standalone GPS cannot meet this accuracy. In this paper a method to couple GPS and a high resolution MEMS pressure sensor is p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40ffdbeb5715d3045a255adc8557852f
https://doi.org/10.1016/j.proche.2009.07.133
https://doi.org/10.1016/j.proche.2009.07.133
Autor:
Jan Christoph Goldschmidt, Bernd Ahrens, Marcel Dyrba, Stefan Schweizer, Armin Wedel, Benedikt Bläsi, Marie-Christin Wiegand, Liv Prönneke, Uwe Rau, Johannes Gutmann, Rudolf Zentel, Andreas Büchtemann, Lorenz Steidl
Publikováno v:
Photon Management in Solar Cells
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb1784d85b2151f9a44e963adb110798
https://doi.org/10.1002/9783527665662.ch11
https://doi.org/10.1002/9783527665662.ch11
Autor:
J. Löffler, Jan Christoph Goldschmidt, Frank C. J. M. van Veggel, B. Herter, Benjamin Fröhlich, Clarissa L. M. Hofmann, Johannes Gutmann, Stefan Fischer, Sebastian Wolf
Publikováno v:
SPIE Proceedings.
Upconversion of sub-band-gap photons is a promising approach to increase the efficiency of solar cells. In this paper, we review the recent progress in upconverter material development and realization of efficient upconverter silicon solar cell devic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40ddfd7951bae3590e17425aff45bbe5
https://doi.org/10.1117/12.2052507
https://doi.org/10.1117/12.2052507
Autor:
Sebastian Wolf, N. Treat, B. Herter, J. Löffler, J. C. Goldschmidt, Roland B. Piper, Nicholas J. Ekins-Daukes, Stefan Fischer, Clarissa L. M. Hofmann, Johannes Gutmann
Publikováno v:
SPIE Proceedings.
For high band gap solar cells, organic molecule based upconverter materials are promising to reduce transmission losses of photons with energies below the absorption threshold. We investigate the approach of embedding the organic upconverter DPA:PtOE
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aedeca08cda10b29d5fd2e4ab9a0f50e
https://doi.org/10.1117/12.2052286
https://doi.org/10.1117/12.2052286
Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells
Autor:
Tim Rist, David Gómez Plaza, Janina Posdziech, Johannes Gutmann, Ana Luisa Martínez Díez, Jan Christoph Goldschmidt
In this paper, we present a concentrator system based on a stack of fluorescent concentrators (FCs) and a bifacial solar cell. Coupling bifacial solar cells to a stack of FCs increases the performance of the system and preserves its efficiency when s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44c1fa253848f3d5d07d0a6b00cf1ecc
https://publica.fraunhofer.de/handle/publica/237718
https://publica.fraunhofer.de/handle/publica/237718
Publikováno v:
Physical Review B. 88
Photonic crystals affect the photon emission of embedded emitters due to an altered local density of photon states (LDOS). We review the calculation of the LDOS from eigenmodes in photonic crystals and propose a rate equation model for fluorescent em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5dd1cb881b75a708348ffd08535f7d7
https://doi.org/10.1103/physrevb.88.205118
https://doi.org/10.1103/physrevb.88.205118
Autor:
Sebastian Wolf, Jan Christoph Goldschmidt, Benedikt Bläsi, B. Herter, Stefan Fischer, Johannes Gutmann
Publikováno v:
SPIE Proceedings.
Upconversion of low-energy photons presents a possibility to overcome the Shockley-Queisser efficiency limit for solar cells. In silicon 20% of the incident energy is lost due to transmission of these photons with energies below the band gap. Unfortu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fe8c56c76cc26f861e18385f560930c
https://doi.org/10.1117/12.2023845
https://doi.org/10.1117/12.2023845
Publikováno v:
2013 IEEE 39th Photovoltaic Specialists Conference (PVSC).
Conventional luminescent solar concentrators (LSC) suffer from losses due to the escape cone of total internal reflection and reabsorption. Embedding the luminescent dye in a photonic crystal influences the emission process and improves the light gui
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c4c254d06cd246f2c6dc20732f15563
https://doi.org/10.1109/pvsc.2013.6744506
https://doi.org/10.1109/pvsc.2013.6744506