Search Results - "Kalt, Heinz"

Highly stable solution processed metal-halide perovskite lasers on nanoimprinted distributed feedback structures by Brenner, Philipp, Stulz, Mareike, Kapp, Dorothee, Abzieher, Tobias, Paetzold, Ulrich W., Quintilla, Aina, Howard, Ian A., Kalt, Heinz, Lemmer, Uli

“…We report on the performance and stability of distributed feedback lasers based on the solution-processed methylammonium lead iodide perovskite (CH3NH3PbI3)…”
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ZnO-Based Hollow Nanoparticles by Selective Etching: Elimination and Reconstruction of Metal−Semiconductor Interface, Improvement of Blue Emission and Photocatalysis by Zeng, Haibo, Cai, Weiping, Liu, Peisheng, Xu, Xiaoxia, Zhou, Huijuan, Klingshirn, Claus, Kalt, Heinz

“…A weak acid selective etching strategy was put forward to fabricate oxide-based hollow nanoparticles (HNPs) using core/shell nanostructures of active…”
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Room-temperature stimulated emission of ZnO: Alternatives to excitonic lasing by Klingshirn, Claus, Hauschild, Robert, Fallert, Johannes, Kalt, Heinz

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Excitonic nature of optical transitions in electroabsorption spectra of perovskite solar cells by Ruf, Fabian, Magin, Alice, Schultes, Moritz, Ahlswede, Erik, Kalt, Heinz, Hetterich, Michael

“…We investigate the electronic structure of solution-processed perovskite solar cells using temperature-dependent electroabsorption (EA) spectroscopy…”
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Temperature-dependent studies of exciton binding energy and phase-transition suppression in (Cs,FA,MA)Pb(I,Br)3 perovskites by Ruf, Fabian, Aygüler, Meltem F., Giesbrecht, Nadja, Rendenbach, Bettina, Magin, Alice, Docampo, Pablo, Kalt, Heinz, Hetterich, Michael

“…Multiple-cation mixed-halide (Cs,FA,MA)Pb(I,Br)3 perovskites containing cesium, formamidinium (FA), and methylammonium (MA) possess excellent properties for a…”
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Co-existence of strongly and weakly localized random laser modes by Fallert, Johannes, Dietz, Roman J. B, Sartor, Janos, Schneider, Daniel, Klingshirn, Claus, Kalt, Heinz

“…Recent theoretical work on random lasing predicts that the occurrence of narrow lasing spikes can be caused by both localized and extended modes of light 1 , 2…”
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Impact of the degree of Cu–Zn order in Cu2ZnSn(S,Se)4 solar cell absorbers on defect states and band tails by Lang, Mario, Renz, Tobias, Opolka, Alexander, Zimmermann, Christian, Krämmer, Christoph, Neuwirth, Markus, Kalt, Heinz, Hetterich, Michael

“…In order to identify the impact of the degree of Cu–Zn order in kesterite Cu2ZnSn(S,Se)4 solar cell absorbers on defect states and band tails, we perform…”
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Cross-sectional Kelvin probe force microscopy on Cu(In,Ga)Se2 solar cells: Influence of RbF and KF post-deposition treatment on the surface potential of the absorber layer by Seeger, Jasmin, Wilhelmi, Florian, Schundelmeier, Jonas, Zahedi-Azad, Setareh, Scheer, Roland, Schmidt, Kerstin, Kalt, Heinz, Hetterich, Michael

“…Post-deposition treatment (PDT) of the absorber layer with alkali fluorides has led to a significant increase in the efficiency of Cu(In,Ga)Se2 (CIGS)…”
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Influence of the Cu Content in Cu2ZnSn(S,Se)4 solar cell absorbers on order-disorder related band gap changes by Lang, Mario, Renz, Tobias, Mathes, Niklas, Neuwirth, Markus, Schnabel, Thomas, Kalt, Heinz, Hetterich, Michael

“…We investigate the electronic structure and the radiative recombination in wet-chemically fabricated Cu2ZnSn(S,Se)4 solar cell absorbers utilizing…”
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A switchable self-assembling and disassembling chiral system based on a porphyrin-substituted phenylalanine–phenylalanine motif by Charalambidis, Georgios, Georgilis, Evangelos, Panda, Manas K., Anson, Christopher E., Powell, Annie K., Doyle, Stephen, Moss, David, Jochum, Tobias, Horton, Peter N., Coles, Simon J., Linares, Mathieu, Beljonne, David, Naubron, Jean-Valère, Conradt, Jonas, Kalt, Heinz, Mitraki, Anna, Coutsolelos, Athanassios G., Balaban, Teodor Silviu

“…Artificial light-harvesting systems have until now not been able to self-assemble into structures with a large photon capture cross-section that upon a…”
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Direct laser writing for active and passive high-Q polymer microdisks on silicon by Grossmann, Tobias, Schleede, Simone, Hauser, Mario, Beck, Torsten, Thiel, Michael, von Freymann, Georg, Mappes, Timo, Kalt, Heinz

“…We report the fabrication of high-Q polymeric microdisks on silicon via direct laser writing utilizing two-photon absorption induced polymerization. The…”
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Ordered, uniform-sized ZnO nanolaser arrays by Zhou, Huijuan, Wissinger, Markus, Fallert, Johannes, Hauschild, Robert, Stelzl, Felix, Klingshirn, Claus, Kalt, Heinz

“…Ordered ZnO nanorod arrays with almost uniform rod size have been grown perpendicularly on Ga N ∕ Al 2 O 3 substrates by a controlled vapor phase transport…”
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High-Q conical polymeric microcavities by Grossmann, Tobias, Hauser, Mario, Beck, Torsten, Gohn-Kreuz, Cristian, Karl, Matthias, Kalt, Heinz, Vannahme, Christoph, Mappes, Timo

“…We report on the fabrication of high-Q microresonators made of low-loss, thermoplastic polymer poly(methyl methacrylate) (PMMA) directly processed on a silicon…”
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Diffuse electroreflectance of thin-film solar cells: Suppression of interference-related lineshape distortions by Krämmer, Christoph, Huber, Christian, Redinger, Alex, Sperber, David, Rey, Germain, Siebentritt, Susanne, Kalt, Heinz, Hetterich, Michael

“…Electroreflectance (ER) is a standard method to determine the band gap of semiconductor materials that has also been applied to thin-film solar cells (TFSCs)…”
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Averaged angle-resolved electroreflectance spectroscopy on Cu(In,Ga)Se2 solar cells: Determination of buffer bandgap energy and identification of secondary phase by Seeger, Jasmin, Grutke, Jonas, Weber, Nico, Schützhoff, Stefan, Jin, Xiaowei, Schneider, Reinhard, Gerthsen, Dagmar, Witte, Wolfram, Hariskos, Dimitrios, Kiowski, Oliver, Schweiger, Manuel, Kalt, Heinz, Hetterich, Michael

“…Currently, the use of Zn(O,S) as buffer material for Cu(In,Ga) Se 2 (CIGS) solar cells is intensely studied in order to further boost the performance of these…”
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A spintronic source of circularly polarized single photons by Asshoff, Pablo, Merz, Andreas, Kalt, Heinz, Hetterich, Michael

“…We present a spintronic single photon source which emits circularly polarized light, where the helicity is determined by an applied magnetic field. Photons are…”
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Low-threshold conical microcavity dye lasers by Grossmann, Tobias, Schleede, Simone, Hauser, Mario, Christiansen, Mads Brøkner, Vannahme, Christoph, Eschenbaum, Carsten, Klinkhammer, Sönke, Beck, Torsten, Fuchs, Jochen, Nienhaus, G. Ulrich, Lemmer, Uli, Kristensen, Anders, Mappes, Timo, Kalt, Heinz

“…We report on lasing in rhodamine 6G-doped, conical polymeric microcavities with high quality factors fabricated on a silicon substrate. Threshold pump energies…”
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Fast electron spin resonance controlled manipulation of spin injection into quantum dots by Merz, Andreas, Siller, Jan, Schittny, Robert, Krämmer, Christoph, Kalt, Heinz, Hetterich, Michael

“…In our spin-injection light-emitting diodes, electrons are spin-polarized in a semimagnetic ZnMnSe spin aligner and then injected into InGaAs quantum dots. The…”
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Template-Assisted Large-Scale Ordered Arrays of ZnO Pillars for Optical and Piezoelectric Applications by Fan, Hong Jin, Lee, Woo, Hauschild, Robert, Alexe, Marin, Le Rhun, Gwenaël, Scholz, Roland, Dadgar, Armin, Nielsch, Kornelius, Kalt, Heinz, Krost, Alois, Zacharias, Margit, Gösele, Ulrich

“…Spatially separated ZnO pillars, typically 300 nm in diameter and 2 μm in height, are fabricated via a template‐directed approach that leads to long‐range…”
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Fabrication of polycrystalline Cu2ZnSnSe4 layers with strongly preferential grain orientation via selenization of Sn/Cu/ZnSe(001)/GaAs(001) structures by Krämmer, Christoph, Sachs, Johannes, Lang, Mario, Pfaffmann, Lukas, Gao, Chao, Gerthsen, Dagmar, Kalt, Heinz, Powalla, Michael, Hetterich, Michael

“…We report on a simple approach for the fabrication of polycrystalline Cu2ZnSnSe4 films on GaAs with strongly preferential grain orientation. Such layers are…”
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