Granek, F., Hermle, M., Huljic, D.M., Schultz-Wittmann, O., Glunz, S.W.
N-type back-contact back-junction solar cells were processed with the use of industrially relevant structuring technologies such as screen-printing and laser processing. Application of the low-cost...
Pysch, D., Ziegler, J., Becker, J.P., Suwito, D., Janz, S., Glunz, S.W., ...
In this letter, the annealing behavior of the open-circuit voltage improvement of n-doped amorphous silicon-carbide heterojunction solar cells is investigated in detail. We present our results of a...
Characterizing the light guiding of fluorescent concentrators (2009)
Goldschmidt, J.C., Peters, M., Hermle, M., Glunz, S.W.
Fluorescent concentrators have gained new research interest recently. The development of new material systems for this type of solar concentrator requires the testing of a wide range of materials....
Fluctuations of the peak current of tunnel diodes in multi-junction solar cells (2009)
Jandieri, K., Baranovskii, S.D., Stolz, W., Gebhard, F., Guter, W., Hermle, M., ...
Interband tunnel diodes are widely used to electrically interconnect the individual subcells in multi-junction solar cells. Tunnel diodes have to operate at high current densities and low voltages,...
Resonant tunneling as a dominant transport mechanism in n-GaAs/p-GaAs tunnel diodes (2008)
Jandieri, K., Baranovskii, S.D., Rubel, O., Stolz, W., Gebhard, F., Guter, W., ...
Current-voltage characteristics of Ga0.99In0.01As tunnel diodes are studied experimentally and theoretically. Three possible tunneling mechanisms are considered: direct band-to-band tunneling,...
Granek, F., Hermle, M., Glunz, S.W.
The relation between current and illumination intensity of three structures of high-efficiency back-junction back-contact silicon solar cells was analyzed. Both, n-type cells with non-diffused front...
Calibrated numerical model of a GaInP-GaAs dual-junction solar cell (2008)
Philipps, S.P., Hermle, M., Letay, G., Dimroth, F., George, B.M., Bett, A.W.
In this letter a calibrated numerical model of a III-V dualjunction solar cell including tunnel diode and Bragg reflector is presented. The quantum efficiencies of the subcells are computed by using...
Resonant electron tunneling through defects in GaAs tunnel diodes (2008)
Jandieri, K., Baranovskii, S.D., Rubel, O., Stolz, W., Gebhard, F., Guter, W., ...
Current-voltage characteristics of GaAs tunnel diodes are studied experimentally and theoretically. In theoretical calculations contributions of three different transport mechanisms are considered:...
Numerical simulation of tunnel diodes and multi-junction solar cells (2008)
Hermle, M., Philipps, S.P., Letay, G., Bett, A.W.
In order to connect individual subcells in monolithically grown multi-junction solar cells Esaki interband tunnel diodes are widely used. In this work, numerical simulations of an isolated III-V...
Shading effects in back-junction back-contacted silicon colar cells (2008)
Hermle, M., Granek, F., Schultz, O., Glunz, S.W.
One of the most often mentioned advantages of back-junction back-contacted silicon solar cells is that this cell structure has no shading losses, because metallization fingers and busbars are both...
Granek, F., Hermle, M., Reichel, C., Grohe, A., Schultz-Wittmann, O., Glunz, S.W.
The role of the phosphorus-doped front surface field (FSF) in n-type back-contact back-junction silicon solar cells was analyzed. The FSF improves the quality of the front surface passivation and...
Solarzelle und Verfahren zur Herstellung einer Solarzelle (2008)
Schultz-Wittmann, O., Granek, F., Hermle, M., Benick, J.
DE 102008005396 A1 UPAB: 20090806 NOVELTY - The cell has a base metallization (3) and an emitter metallization (6) arranged at a metallization side of the cell, where the metallization side is a...
Effects of optical coupling in III-V multilayer systems (2007)
Baur, C., Hermle, M., Dimroth, F., Bett, A.W.
A method to visualize and investigate radiative recombination processes in compound semiconductor materials by utilizing the effect of optical coupling in III-V multilayer systems is presented. For...
Development and production of European III-V multi-junction solar cells (2007)
Meusel, M., Bensch, W., Bergunde, T., Kern, R., Khorenko, V., Köstler, W., ...
Diplomarbeit an der Fachhochschule Köln, Fakultät für Bauingenieurwesen und Umwelttechnik, Studienfach Versorgungs- und Entsorgungstechnik, Vertiefungsrichtung Kommunal- und Umwelttechnik....
Kasemann, M., Schubert, M.C., The, M., Köber, M., Hermle, M., Warta, W.
Spatially resolved electroluminescence (EL) and photoluminescence (PL) images of solar cells are compared to spatially resolved power loss images obtained by illuminated lock-in thermography (ILIT)....
Simulating single-junction GaAs solar cells including photon recycling (2006)
Letay, G., Hermle, M., Bett, A.W.
To improve and accelerate further developments of III-V solar cells an accurate and reliable modelling is necessary. In this work we present a comprehensive two-dimensional numerical model of single...
Optimisation of laser-fired aluminium emitters for high efficiency n-Type Si solar cells (2006)
Ganek, F., Hermle, M., Fleischhauer, B., Grohe, A., Schultz, O., Willeke, G.
Analysis of the effects caused by parameter-inhomogeneity with a 2D modelling tool (2006)
Köber, M., Hermle, M., Isenberg, J., Kasemann, M., Cardenes, H., Warta, W.
Schultz, O., Glunz, S., Warta, W., Preu, R., Grohe, A., Hermle, M., ...
Schultz, O., Glunz, S., Hermle, M.
WO 2008052767 A2 UPAB: 20080627 NOVELTY - The solar cell (1) has a p-finger contact (3) and a n-finger contact (3') staying in electrical contact with a p-semiconductor and a n-semiconductor,...
Optimisation of laser-fired aluminium emitters for high efficiency n-Type Si solar cells (2006)
Ganek, F., Hermle, M., Fleischhauer, B., Grohe, A., Schultz, O., Willeke, G.
Development status of European multi-junction space solar cells with high radiation hardness (2005)
Meusel, M., Baur, C., Guter, W., Hermle, M., Dimroth, F., Bett, A.W., ...
Glunz, S.W., Grohe, A., Hermle, M., Hofmann, M., Janz, S., Roth, T., ...
Thin large area solar cells (2005)
Schindler, R., Hermle, M., Kleer, G., Kohn, C., Lautenschlager, H., Reis, I.E., ...
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Characterization of laser-fired contacts processed on wafers with different resistivity (2003)
Grohe, A., Schneiderlöchner, E., Walz, S., Glunz, S.W., Preu, R., Willeke, G., ...
High-efficiency silicon solar cells for low-illumination applications (2002)
Glunz, S.W., Dicker, J., Esterle, M., Hermle, M., Isenberg, J., Kamerewerd, F., ...
Control of Hypertension by Yerapamil Enhances Renal Damage in a Rat Remnant Kidney Model (1991)
Brunner, F. P., Bock, H. A., Hermle, M., Thiel, G., Mihatsch, M. J.
The effect of calcium channel blockers on the progression of renal failure is controversial. In contrast with earlier studies, we recently reported that moderately large doses of verapamil...