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433 Aktuelle Fachpublikationen zum Thema temperature

mit folgenden Suchkriterien:

Structure, ferroelectric, ferromagnetic, and piezoelectric properties of Al‐modified BiFeO3–BaTiO3 multiferroic ceramics

24.10.2014 | Wei Zhou, Qiaoji Zheng, Ying Li, Qiang Li, Yang Wan, Min Wu, Dunmin Lin, physica status solidi (a), 2014

0.725BiFe1−xAlxO3–0.275BaTiO3 + 1 mol% MnO2 ceramics were prepared by a conventional ceramic technique. The effects of Al doping and sintering temperature on microstructure, piezoelectricity and magnetism of the ceramics were studied. The crystalline structures of BFO‐BT‐BA‐x ceramics sintered ...


Enhanced low‐field magnetoresistance of La0.7Sr0.3Mn1–xNixO3 compounds by annealing process

22.10.2014 | A. M. Ahmed, M. A. Abedellateef, H. A. Abd El‐Ghanny, Abd El Mo'ez A. Mohamed, physica status solidi (a), 2014

A study of Mn‐site substitution by Ni2+ and the effect of annealing time in polycrystalline bulk La0.7Sr0.3MnO3 in composition range (0 ≤ x ≤ 0.1) is presented. This study involves structural, electrical, magnetoresistance, and thermoelectric power (TEP) measurements. X‐ray diffraction was used ...


Co‐evaporation process study of Cu2ZnSnSe4 thin films by in situ light scattering and in situ X‐ray diffraction

21.10.2014 | Stefan Hartnauer, Leonard A. Wägele, Frank Syrowatka, Gunar Kaune, Roland Scheer, physica status solidi (a), 2014

Multi‐stage co‐evaporation processes for the growth of Cu2ZnSnSe4 (CZTSe) thin films are investigated with time‐resolved in situ angle‐dispersive X‐ray diffraction (in situ XRD). Different preparation protocols were applied and controlled by in situ laser light scattering (in situ LLS). The ...


Rapid thermal processing annealing challenges for large scale Cu2ZnSnS4 thin films

03.10.2014 | Laura Vauche, Jérôme Dubois, Aurélie Laparre, Marcel Pasquinelli, Sylvie Bodnar, Pierre‐Philippe Grand, Salvador Jaime, physica status solidi (a), 2014

Electrodeposition followed by rapid thermal annealing is a favorable process for industrial solar thin film fabrication. In this regard, we attempt to develop a process for earth‐abundant pure sulfide kesterite solar cells fabrication of Cu2ZnSnS4 (CZTS) at pre‐industrial scale (15 × 15 cm2). ...


Site‐controlled growth of GaAs nanoislands on pre‐patterned silicon substrates

03.10.2014 | Muhammad Usman, Johann Peter Reithmaier, Mohamed Benyoucef, physica status solidi (a), 2014

GaAs islands have been grown by molecular beam epitaxy on Si (100) substrates patterned with nanoscale holes using only few monolayer deposition thicknesses. The site‐controlled growth has been achieved without masking the Si surface with SiO2 between the patterned holes. The nucleation density ...


A simulation study on the impact of band gap profile variations and secondary barriers on the temperature behavior, performance ratio, and energy yield of Cu(In,Ga)(Se,S)2 solar cells

03.10.2014 | Christian Schubbert, Patrick Eraerds, Michael Richter, Jürgen Parisi, Ingo Riedel, Thomas Dalibor, Jörg Palm, physica status solidi (a), 2014

Using device simulations, we investigate the change of the temperature behavior of Cu(In,Ga)(Se,S)2 solar cells. Our goal is to understand the behavior of the performance ratio (PR), normalized energy yield (Y), and the temperature coefficient of the open‐circuit voltage as a contribution to ...


Self‐assembled Au dots in SiGe/Si layers for plasmonic application

03.10.2014 | Peter I. Gaiduk, Arne Nylandsted Larsen, physica status solidi (a), 2014

The concept of this study is based on self‐assembled formation of voids in strained Si/SiGe heterostructures, and formation of nano‐shells and nano‐particles of gold through a gettering process. The gettering of vacuum deposited gold to the voids was studied using Rutherford backscattering and ...


Effects of surfactant and fabrication procedure on the electrical conductivity and electromagnetic shielding of single‐walled carbon nanotube films

29.09.2014 | F. F. Komarov, P. Zukowski, R. M. Kryvasheyeu, E. Munoz, T. N. Koltunowicz, V. N. Rodionova, A. K. Togambaeva, physica status solidi (a), 2014

Two different procedures of carbon nanotube film fabrication are discussed. The size, structural, and optical characteristics as well as electrophysical properties of initial nanotubes and the prepared buckypaper are studied. A nature of the observed temperature activated charge transport is ...


The gas‐dynamic synthesis of diamond by thermal activation

16.07.2014 | Alexei Emelyanov, Aleksey Rebrov, Ivan Yudin, physica status solidi (a), 2014

The study presents results on deposition of diamond structures from high‐velocity flows of carbon‐containing a gas mixture activated by hot surfaces. Important problems were solved by creation of the reactor using a spiral of heat‐resistant material, inserted into the chamber with an inlet ...


Aluminum doping of CuInSe2 synthesized by solution process and its effect on structure, morphology, and bandgap tuning

14.07.2014 | Zhi Yan, Weizhi Deng, Xia Zhang, Qian Yuan, Peiran Deng, Jun Liang, Lei Sun, physica status solidi (a), 2014

Al‐doped CuInSe2 material is prepared by a low‐cost wet chemical process. The key properties of Al‐doped CuInSe2 as a successful solar cell material are investigated, such as crystal structure, morphology, optical properties, and bandgap. In situ X‐ray diffraction measurements indicate that the ...


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