Zobrazeno 1 - 10
of 34
pro vyhledávání: '"C. Swiatkowski"'
Publikováno v:
Applied Physics A. 103:43-50
The selective ablation of thin (∼100 nm) SiO2 layers from silicon wafers has been investigated by applying ultra-short laser pulses at a wavelength of 800 nm with pulse durations in the range from 50 to 2000 fs. We found a strong, monotonic decreas
Autor:
C. Swiatkowski, M. Kunst
Publikováno v:
Applied Physics A Materials Science & Processing. 61:623-629
Contactless transient photoconductivity measurements of intrinsic a-Si: H films in the microwave frequency range are presented. The measurements are evaluated quantitatively and the electron drift mobility is determined. It is shown that the influenc
Publikováno v:
Journal of Applied Physics. 78:1763-1775
Theory and measurements of the conductivity and the (transient) photoconductivity in the microwave frequency range are presented. The theory is tested on noninvasive measurements of semiconductors with known properties, i.e., Si wafers, in a simple a
Autor:
M. Kunst, C. Swiatkowski
Publikováno v:
Journal of Non-Crystalline Solids. :243-246
During the deposition of a-Si:H films at different temperatures on c-Si substrates the transient photoconductivity was monitored in order to obtain information on the electronic properties of the a-Si:H/c-Si interface. The interface was characterized
Publikováno v:
Journal of Non-Crystalline Solids. :717-720
Solar Cells consisting of an amorphous silicon emitter on a crystalline silicon base were prepared by PECVD. Measured generator and bias-dependent spectral response characteristics of these devices were interpreted by aid of numerical simulations. By
Autor:
Heinrich Christoph Neitzert, J.B. Chevrier, Regis Vanderhaghen, Marinus Kunst, C. Swiatkowski
Publikováno v:
Journal of Non-Crystalline Solids. :837-840
Multilayers of a-Si:N/a-SiN:H and a-Si:H/a-SiC:H were investigated by contactless transient photoconductivity measurements. A faster decay of the photoconductivity was observed in the a-Si:H/a-SiC:H multilayer whereas the a-Si:H/a-SiN:H multilayer wa
Publikováno v:
Journal of Non-Crystalline Solids. :487-490
The optoelectronic properties of a-Si:H films grown at different substrate temperatures between 30°C and 250°C were evaluated in-situ by contactless Time Resolved Microwave Conductivity (TRMC) measurements. The transient photoconductivity induced b
Publikováno v:
MRS Proceedings. 467
By comparison of transient photoconductivity (TPC) and transient photoinduced absorption (PA) the influence of the density of states in the bandgap on excess charge carrier kinetics is studied for a-Si:H films deposited at different temperatures and
Autor:
D. McClymont, C. Dietrich, H. Bergner, C. Swiatkowski, K-O. Hofacker, K. Hempel, M. Pohland, D. Runge, J. Sturm, G. Sargsjan, F. Esfahani, A. Benedix, H.H. Berger, D. Bartelt, J. Degenhardt
Publikováno v:
International Symposium for Testing and Failure Analysis.
Conventional needle probecard techniques suffer from several problems: needles scratch the pads causing bonding problems, the maximum test speed is limited by the poor high frequency performance of the needle contacts. This contribution presents a ne