Institut für Hochfrequenz- und Halbleiter-Systemtechnologien
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Interdigitated back-contacts for poly-crystalline thin-film silicon solar cells on glass

Sonntag, Paul (2017)

This thesis is about the liquid phase crystallization (LPC) technology to produce solar cell absorbers of 10 − 40 µm thickness directly on glass, the development of interdigitated back-contact (IBC...

Waveguide integrated MQW p-i-n photodiodes

Zhou, Gan (2017)

In this work, waveguide integrated multiple quantum well p-i-n photodiodes are developed and characterized. Compared to bulk photodiodes, multiple quantum well photodiodes have special properties i...

Fiber optical parametric amplifiers in optical communication systems

Marhic, Michel E.; Andrekson, Peter A.; Petropoulos, Periklis; Radic, Stojan; Peucheret, Christophe; Jazayerifar, Mahmoud (2015)

The prospects for using fiber optical parametric amplifiers (OPAs) in optical communication systems are reviewed. Phase-insensitive amplifiers (PIAs) and phase-sensitive amplifiers (PSAs) are consi...

Liquid phase crystallized silicon on sinusoidal textured glass substrates

Köppel, Grit (2017)

The aim of this thesis is to identify a light trapping scheme for liquid phase crystallized silicon thin-film solar cells providing anti-reflective properties in the wavelength range of interest an...

Contactless visible light probing for nanoscale ICs through 10 μm bulk silicon

Boit, Christian; Lohrke, Heiko; Scholz, Philipp; Beyreuther, Anne; Kerst, Uwe; Iwaki, Y. (2015)

This paper explains why only optical techniques will be able to provide debug and diagnosis of bulk silicon FinFET technologies. In order to apply optical techniques through a convenient thickness ...

Nanocrystalline silicon and silicon oxide contact layers for silicon heterojunction solar cells

Mazzarella, Luana (2017)

Crystalline-silicon solar cells are presently the main technology to supply the rapidly growing market for competitive photovoltaic electricity. To drive conversion efficiency of such cells further...

Differentieller Mikrowellen-Leistungsoszillator für die Realisierung ultrakompakter Plasmaquellen in Matrixanordnung

Bansleben, Christian (2017)

In der vorliegenden Arbeit werden neue Ansätze zur Realisierung besonders platzsparender und effizienter Mikrowellengeneratoren im Leistungsbereich bis 50 W auf Basis von Leistungsoszillatoren demo...

Transient Liquid Phase Soldering als Verbindungstechnik leistungselektronischer Halbleiter für Hochtemperaturanwendungen

Ehrhardt, Christian (2017)

In zahlreichen Anwendungsfeldern der Elektronik besteht der Wunsch oder die Notwendigkeit die Einsatztemperatur des elektronischen Moduls zu erhöhen, wie beispielsweise in der Leistungselektronik, ...

Deposition von transparenten leitfähigen Oxiden mit hoher Ladungsträgermobilität bei niedriger Prozesstemperatur und deren Integration in Photovoltaik-Zellen

Scherg-Kurmes, Harald (2017)

Transparent conductive oxides (TCOs) are employed as contact layers thin film solar cells. They transmit incoming light to the absorber and conduct the generated charge carriers laterally to the me...

Charakterisierung nanoskaliger Schichtstapel durch eine Kombination aus referenzprobenfreier Röntgenspektroskopie unter streifendem Einfall und der Röntgenreflektometrie

Hönicke, Philipp Werner (2016)

Eine genaue und zerstörungsfreie tiefenabhängige Charakterisierung nanoskaliger Schichtsysteme ist ein essentielles Thema in vielen Bereichen der aktuellen Forschung. Besonders die sogenannten Nano...

Spatially resolved refractive index detection based on SOI ring resonators

Jäger, Matthias (2016)

This PhD thesis addresses the application of silicon photonics for the examination of thin layers. Due to evanescent fields ring resonators that interact with their surroundings. This is used to ob...

Signal generation for millimeter wave and THz applications in InP-DHBT and InP-on-BiCMOS technologies

Hossain, Muhammad Maruf (2016)

Increasing research activities in the mm-wave and sub-THz bands using different technologies have reached significant achievements over the past few years. A variety of commercial and defense appli...

V-band low noise amplifier and mixer design using 90 nm CMOS technology

Malignaggi, Andrea (2016)

This thesis is the result of more than three years research work at TU Berlin. Several radio frequency integrated circuits have been designed in a commercial CMOS technology, the TSMC 90nm, and mea...

Interfaces in amorphous/crystalline silicon heterojunction solar cells

Mews, Mathias (2016)

The passivation of the amorphous/crystalline silicon heterojunction (SHJ) and the hole transport across the same are the dominating topics in this thesis. The different chapters focus on: The influ...

Line-shaped continuous wave laser crystallization of silicon on glass

Kühnapfel, Sven (2016)

Liquid phase crystallization is a promising technology to grow multicrystalline silicon thin films on glass substrates. As part of this work the influence of various sample stacks and materials wer...

Kerr nonlinearity compensation using polarization-independent fiber-based optical parametric amplifier in high-speed optical transmission systems

Sackey, Isaac (2016)

Kerr nonlinearity compensation in long-haul optical transmission networks has become necessary since the nonlinear impairment poses fundamental limits on the achievable transmission reach. Mid-link...

Cylindrical and nonconformal material interfaces in the finite integration technique

Kirsch, Stefan (2016)

The present work addresses a fundamental issue of electromagnetic simulations by means of the Finite Integration Technique (FIT). This method is typically applied to Cartesian and, therefore, geome...

CIGSe superstrate solar cells

Heinemann, Marc Daniel (2016)

The prospects and the limitations of Cu(In,Ga)Se2 (CIGSe) solar cells in superstrate configuration were studied in this work. The, compared to the standard substrate configuration, inverted device...

Parametric amplifiers and their system applications in optical fiber communications with phase-shift keying and quadrature-amplitude modulation

Richter, Thomas (2016)

In this thesis, parametric amplification based on four-wave mixing in highly nonlinear fibers and its application in optical fiber communications is investigated. The focus of the work is on the de...

Characterization of nonlinear distortions in fiber optical transmission systems with mode-division multiplexing

Rademacher, Georg Friedrich (2015-08-04)

Kerr-Effekt basierende Nichtlinearitäten stellen einen limitierenden Faktor für die Übertragungsleistung von faser-optischen Kommunikationssystemen mit räumlichen Multiplexverfahren (engl. Space Di...