Anna Krammer

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Publications associées (35)

Infrared Optical Properties of Doped and Pure Thermochromic Coatings for Solar Thermal Absorbers

Anna Krammer, Josef Andreas Schuler, Fabrice Thierry Demière

A new generation of solar collectors is based on thermochromic thin film technology, where the remarkable optical changes of vanadium dioxide, through its reversible semiconductor-to-metal phase transition, are exploited. This study reports on the infrared ...

ISES2018

Tunable RF phase shifters based on Vanadium Dioxide metal insulator transition

Mihai Adrian Ionescu, Anna Krammer, Andrei Müller, Josef Andreas Schuler, Montserrat Fernandez-Bolanos Badia, Wolfgang Amadeus Vitale, Emanuele Andrea Casu, Matteo Cavalieri, Nicolò Oliva, Alessandro Fumarola

2018

Thermochromic coatings for overheating protection of solar thermal collectors - novel type of doping (TARGET95)

Andreas Schueler, Anna Krammer

Overheating and the resulting stagnation of solar thermal collectors is a common problem even in central European latitudes. During stagnation, high temperatures lead to water evaporation, glycol degradation and stresses in the collector with increasing va ...

2018

Vanadium Oxide Bandstop Tunable Filter for Ka Frequency Bands Based on a Novel Reconfigurable Spiral Shape Defected Ground Plane CPW

Mihai Adrian Ionescu, Anna Krammer, Emanuele Andrea Casu, Josef Andreas Schuler, Andrei Müller, Montserrat Fernandez-Bolanos Badia, Alessandro Fumarola

2018

Towards industrial implementation

Andreas Schueler, Anna Krammer

2018

Thermochromic coatings for overheating protection of solar thermal collectors - novel type of doping (TARGET95)

Andreas Schueler, Anna Krammer

2017

A Steep-Slope Transistor Combining Phase-Change and Band-to-Band-Tunneling to Achieve a sub-Unity Body Factor

Mihai Adrian Ionescu, Anna Krammer, Teodor Rosca, Josef Andreas Schuler, Cem Alper, Wolfgang Amadeus Vitale, Arnab Biswas, Emanuele Andrea Casu, Qun Zhao

Steep-slope transistors allow to scale down the supply voltage and the energy per computed bit of information as compared to conventional field-effect transistors (FETs), due to their sub-60 mV/decade subthreshold swing at room temperature. Currently pursu ...

Nature Research2017

Shunt capacitive switches based on VO2 metal insulator transition for RF phase shifter applications

Mihai Adrian Ionescu, Andreas Schueler, Mariazel de la Candelas Maqueda López, Anna Krammer, Josef Andreas Schuler, Montserrat Fernandez-Bolanos Badia, Michele Tamagnone, Wolfgang Amadeus Vitale, Emanuele Andrea Casu, Nicolò Oliva

IEEE2017

Coating for optical and electronic applications

Andreas Schueler, Josef Andreas Schuler, Anna Krammer, Antonio Paone

Single- or multilayered coating, such as a selective solar absorber coating or a coating being part of an integrated electronic circuit, comprising one or more layers containing germanium (Ge) doped VO2+x, where -0.1 ≤ x ≤ 0.1. ...

2017

Elevated transition temperature in Ge doped VO2 thin films

Mihai Adrian Ionescu, Andreas Schueler, Arnaud Magrez, Anna Krammer, Wolfgang Amadeus Vitale, Piotr Mocny

Thermochromic GexV1-xO2+y thin films have been deposited on Si (100) substrates by means of reactive magnetron sputtering. The films were then characterized by Rutherford backscattering spectrometry (RBS), four-point probe electrical resistivity measuremen ...

2017

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Tunable RF phase shifters based on Vanadium Dioxide metal insulator transition

2018

Vanadium Oxide Bandstop Tunable Filter for Ka Frequency Bands Based on a Novel Reconfigurable Spiral Shape Defected Ground Plane CPW

Mihai Adrian Ionescu, Anna Krammer, Emanuele Andrea Casu, Josef Andreas Schuler, Andrei Müller, Montserrat Fernandez-Bolanos Badia, Alessandro Fumarola

2018