Björn Hoffmann
Max Planck Society
21 Papers
128 Citations
Björn Hoffmann is an academic researcher from Max Planck Society. The author has contributed to research in topics: Silicon & Crystalline silicon. The author has an hindex of 14, co-authored 21 publications. Previous affiliations of Björn Hoffmann include Leibniz Association & University of Erlangen-Nuremberg.
Chat about Author
Papers
Nanowire Arrays in Multicrystalline Silicon Thin Films on Glass: A Promising Material for Research and Applications in Nanotechnology
Sebastian W. Schmitt,Florian Schechtel,Daniel Amkreutz,Muhammad Y. Bashouti,Sanjay K. Srivastava,Björn Hoffmann,Christel Dieker,Erdmann Spiecker,Bernd Rech,Silke Christiansen +9 more
TL;DR: Integrating sphere measurements show that SiNW patterning of the multicrystalline Si (mc-Si) starting thin film on glass substantially increases absorption and reduces reflection, as being desired for an application in thin film photovoltaics (PV).
84
Encapsulation of silver nanowire networks by atomic layer deposition for indium-free transparent electrodes
Manuela Göbelt,Ralf Keding,Sebastian W. Schmitt,Sebastian W. Schmitt,Björn Hoffmann,Sara Jäckle,Sara Jäckle,Michael Latzel,Michael Latzel,Vuk V. Radmilović,Vuk V. Radmilović,Velimir R. Radmilović,Velimir R. Radmilović,Erdmann Spiecker,Silke Christiansen,Silke Christiansen +15 more
TL;DR: In this article, a nano-composite transparent electrode material was developed for solar cells, composed of a wet-chemically synthesized silver nanowire (AgNW) network encapsulated in a transparent conductive oxide (TCO) which was deposited with nano-scale precision by atomic layer deposition (ALD).
78
A Sub-$\rm \lambda^{3}$-Volume Cantilever-based Fabry-Pérot Cavity
Hrishikesh Kelkar,Daqing Wang,Diego Martin-Cano,Björn Hoffmann,Silke Christiansen,Stephan Götzinger,Vahid Sandoghdar +6 more
TL;DR: In this article, an open plane-concave Fabry-Perot resonator with a mode volume below λπ 3$ at optical frequencies is presented. But the mode volume is not limited to single nanoparticles and can be used to detect cavity resonance shifts even at quality factors as low as $100.
43
Glow discharge techniques in the chemical analysis of photovoltaic materials
Sebastian W. Schmitt,Sebastian W. Schmitt,Cornel Venzago,Björn Hoffmann,Björn Hoffmann,V. A. Sivakov,Thomas Hofmann,Johann Michler,Silke Christiansen,Silke Christiansen,Gerardo Gamez +10 more
TL;DR: In this article, the authors present an integrated overview on the prospects of glow discharge (GD) methods in the chemical analysis of photovoltaic materials. But, they do not discuss the application potential of GD methods in a PV development or production process.
27
Fabrication and characterization of plasmonic nanocone antennas for strong spontaneous emission enhancement.
Björn Hoffmann,Simon Vassant,Xue-Wen Chen,Xue-Wen Chen,Stephan Götzinger,Stephan Götzinger,Vahid Sandoghdar,Vahid Sandoghdar,Silke Christiansen,Silke Christiansen +9 more
TL;DR: This study reports on the fabrication of nanocones with base diameters and heights in the range of 100 nm with variable aspect ratios using focused ion beam milling of sputtered nano-crystalline gold layers and shows very good agreement with finite-difference time-domain calculations.
25