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Current group members
Topics
Characterization of optical and light emission properties of rare earth doped wide band-gap semiconductors. Research on optical properties of dielectric thin films by VASE and spectrophotometry. Modeling optical properties of crystalline and amorphous semiconductors. Research on the amorphous SiC:H for photo-catalysis of water.
Topics
Investigation of passivation materials for silicon solar cells in cooperation with the Helmholtz-Zentrum Berlin (HZB) and the Technische Universität (TU) Ilmenau. The investigated materials include AlN and SiN on silicon wafers and SiON on laser-crystallized silicon.
Monitoring and modeling of PV system energy-generation and characterization of different PV module technologies in cooperation with the Universidad de Jaen (UJA), Spain.
Researcher
Dr. Ing. Rolf Grieseler
rolf.grieseler@pucp.edu.pe
rolf.grieseler@tu-ilmenau.de
Topics
Investigation of multi layer systems, optical and mechanical properties of ceramics and semiconductors and MEMs structures.
Topics
Study of optical and electronic properties of passivation materials for silicon solar cells. Characterization of MIS (metal-insulator-semiconductor) devices using the High Frequency Capacitance-Voltage method. Investigation of implementation of rare earth into passivation materials for up-/down-conversion
Topics
Development of wide band gap semiconductors doped with rare earths for applications in opto-electronics and photovoltaics.
Topics
Study of the optical emission properties of Tb rare earths in different matrix materials (SiC, AlN, TiO2).
PhD. Student
MSc. María del Carmen Mejia
Topics
Study and characterization of Photoelectrochemical Cells (PEC) for solar water splitting, based on Hydrogenated Amorphous Silicon Carbide Semiconductor.
Topics
Electrical characterization of semiconductor thin films, metal sheets, metal-semiconductor contacts, field effect transistors and solar cells. Designed, developed, and installed the custom applications & automation of measurement systems and atmospheric sensors in LabView.
Topics
Derivation of the exponential tails and fundamental absorption equations ruling the optical absorption of amorphous semiconductors following the frozen phonon model.
Topics
Operation and maintenence of RF Magnetron Sputtering System and associated High Vacuum and Ultra-High Vacuum components. Operation of UV/VIS/NIR Spectrophotometer for the transmittance measurements of thin film samples, and Capacitance-Voltage measuremnts for the surface defect characterization of silicon wafers.
Topics
Fabrication of indium tin oxide (ITO) thin films doped with Tb rare earths by RF magnetron sputtering and study of theirs optical, electrical and luminescence properties.
Topics
Study of AlN:H single layers as a passivation material for silicon wafers in photovoltaic applications by means mainly of high frequency capacitance-voltage measurements.
Topics
Optical, electrical and structural characterization of thin films based on hydrogenated amorphous silicon carbide p-type doped with aluminum produced by Ratio Frecuency – magnetron sputtering technique .
Topics
Hydrogen as an alternative energy carrier has attracted an increasing attention since it is a non-toxic renewable element and its combustion with oxygen results in the formation of water to release energy. Amorphous SiC thin films are extensively studied for their potential use as photoelectrode integrated with a-Si tandem photovoltaic (PV) cell for Hydrogen production directly from water using sunlight. In this frame, the present work focuses on the photo-electrochemical characterization of hydrogenated amorphous silicon carbide (a-SiC:H) films grown through radiofrequency magnetron sputtering technique and optical characterization.
Topics
Study of the optical properties of thin films of silicon nitride (SiN): Change of optical parameters with the concentration of nitrogen.
Lic. Student
Miguel Piñeiro Sales
mpineiros@uni.pe
Topics
Tunning the electrical and optical properties of transparent conductive oxides. Characterization by XRD, Van Der Pauw, UV-VIS, Raman.
Topics
Nominal power modeling and study of the impact of dust deposition on photovoltaic modules in the city of Lima, Peru.
Procedure for estimating the nominal power of a photovoltaic generator.
Modeling of the nominal power of a PV generator under clear and cloudy sky conditions.
Topics
Electrical Characterization of aluminum contacts manufactured by physical vapor deposition on silicon wafers of different doping.
Former group members
Group founder
Prof. Dr. Roland Weingärtner
roland.weingaertner@freenet.de
Dr. Roland Weingärtner founded the Materials Science Group of the Physics Section at the Pontificia Universidad Católica del Perú (PUCP) in 2005 in the frame work of a research project funded for 5 years by the Deutsche Forschungsgemeinschaft (DFG) in collaboration with the Friedrich Alexander Universität (FAU). The DFG project in 2005 included the setup of a new laboratory, installing a RF-sputtering deposition system. This enabled the deposition and study of the light emission properties of amorphous wide-bandgap semiconductors SiC, SiN and AlN doped with rare earths (RE). During his leadership, the group has expanded its activities covering wider research topics which have been supported by different projects in recent years. In 2018, after 13 years of pioneering work in Peru, Dr. Weingärtner returned to Germany to continue his career. For both his professional and private future, the Materials Science Group wishes Dr. Weingärtner all the best and continued success.
Topics
Development of an optomechanical system to enable in-situ spectroscopy of luminescent thin-films doped with rare earths during deposition by RF magnetron sputtering.
Currently at Leibniz University of Hanover
Synthesis and optical characterization of amorphous silicon carbide (a-SiC) thin films and related materials.
Topics
Investigation of thermal treatments for thin films of SiC and AlN doped with Tb and deposited on different substrates.
Topics
Study of optical and structural properties of thin multilayers of a-SiC and / or a-AlN doped with Tb-Yb and / or Er-Yb. Characterized by the techniques of dispersive energy spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy and X-ray reflectometry (XRR).
Topics
Investigation of optical properties of thin films using variable transmittance spectrum in order to optimize the thickness and the complex refraction index of finite series type.
Dr. Ing. Oliver Erlenbach
Oliver.Erlenbach@web.de
Currently @ Bundespatentgericht
In 2005, Oliver Erlenbach student at the Friedrich-Alexander University Erlangen-Nuremberg came to the PUCP in order to perform his PhD in materials science, financed by the DAAD. This PhD has been carried out within the framework of cooperation with the PUCP and University of Erlangen. A major part of the scientific research for this PhD took place in Lima, Peru, where Oliver Erlenbach participated in establishing a new material research laboratory for the production of thin films using RF magnetron sputtering deposition in the framework of a DFG/BMZ project. In his PhD thesis, he focused on the optical characterization of lanthanide doped (SiC)1-x(AlN)x-films in particular.
Setup and improvements of the trial rf- magnetron sputtering system. Preparation of (SiC)1-x(AlN)x thin films and their structural and optical characterization.
Topics
Optical and vibrational properties of amorphous silicon nitrite thin films (a-SiN) grown by rf magnetron sputtering.
Topics
Effect of the oxidation on stability of amorphous silicon nitrite thin films (a-SiN).
Topics
The spectra generated from thin films in the order of nanometers (200-500 nm) produce additional spectrum fringes that impede the analysis of samples, furthermore it produces fictitious transmittance greater than 100%. This work aims to mathematically describe these fringes, to implement the Hodrick-Prescott algorithm, which estimates the cyclical part of a data sequence, baseline data in our case. With the specter corrected estimate the number bonds of the sample, and percentage of crystallinity. Finally study the degradation of the samples.
Topics
Synthesis and characterization of hydrogenated aluminum nitride (AlN:H) thin films for photovoltaic applications.
Sebastian Gomez
Topics
Estudio de un sistema fotovoltaico: caracterización, simulación y evaluación de diversos métodos de análisis y predicción .
List of former Master students
Barbara Reinartz, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2012. reinartz.barbara@googlemail.com
Sabine Zitzelsberger, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2010. zitzlsberger-sabine@gmx.de
Andreas Münch, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2008. andym2110@googlemail.com
List of former Bachelor students
Stefan Kreppel, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2011.
Stefan Möckel, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2011.
Max Shiefbahn, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2011.
Anja Winterstein, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2010.
Thomas Hupfer, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2010.
Matthias Steidl, Institut für Werkstoffwissenschaften VI der Universität Erlangen-Nürnberg, 2010.
Nam Gutzeit, Fakultätsübergreifendes Institut für Werkstofftechnik der Technischen Universität Ilmenau, 2009.
Stefan Woetzel, Fakultätsübergreifendes Institut für Werkstofftechnik der Technischen Universität Ilmenau, 2008.
David Lorenz, Fakultätsübergreifendes Institut für Werkstofftechnik der Technischen Universität Ilmenau, 2008
Rolf Grieseler, Fakultätsübergreifendes Institut für Werkstofftechnik der Technischen Universität Ilmenau, 2008
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