FG Technologie für Dünnschicht-Bauelemente

6 Items

Recent Submissions
Transparent conductive oxides for silicon heterojunction solar cells: interaction between materials and device

Cruz Bournazou, Alexandros (2021)

Crystalline-silicon (c-Si) based solar cells are the dominating technology supplying the market of photovoltaic modules presently and a sustainable method of electricity generation. One promising solar cell concept that can boost the efficiency of this technology and is gaining on industrial relevance is the silicon heterojunction (SHJ) solar cell. In this work, the behavior of three industri...

Plasma Assisted Reduction of Graphene Oxide Films

Vinoth Kumar, Sri Hari Bharath ; Muydinov, Ruslan ; Szyszka, Bernd (2021-02-03)

The past decade has seen enormous efforts in the investigation and development of reduced graphene oxide (GO) and its applications. Reduced graphene oxide (rGO) derived from GO is known to have relatively inferior electronic characteristics when compared to pristine graphene. Yet, it has its significance attributed to high-yield production from inexpensive graphite, ease of fabrication with sol...

Vibrational dynamics in lead halide hybrid perovskites investigated by Raman spectroscopy

Ibaceta-Jaña, Josefa ; Muydinov, Ruslan ; Rosado, Pamela ; Mirhosseini, Hossein ; Chugh, Manjusha ; Nazarenko, Olga ; Dirin, Dmitry N. ; Heinrich, Dirk ; Wagner, Markus R. ; Kühne, Thomas D. ; Szyszka, Bernd ; Kovalenko, Maksym V. ; Hoffmann, Axel (2020-02-26)

Lead halide perovskite semiconductors providing record efficiencies of solar cells have usually mixed compositions doped in A- and X-sites to enhance the phase stability. The cubic form of formamidinium (FA) lead iodide reveals excellent opto-electronic properties but transforms at room temperature (RT) into a hexagonal structure which does not effectively absorb visible light. This metastable ...

New TCO for use as transparent front contact in chalcopyrite thin film solar cells

Erfurt, Darja (2019)

In this thesis the applicability of high-mobility indium oxide based transparent conductive oxides (TCOs) as front contact in Cu(In,Ga)(S,Se)2 (CIGS) solar cells and modules was investigated. The unique trade-off between optical and electrical properties promises improved short circuit current densities compared to conventional CIGS device configurations, in particular in CIGS modules. By dopin...

Crystallisation Phenomena of In2O3:H Films

Muydinov, Ruslan ; Steigert, Alexander ; Wollgarten, Markus ; Michałowski, Paweł Piotr ; Bloeck, Ulrike ; Pflug, Andreas ; Erfurt, Darja ; Klenk, Reiner ; Körner, Stefan ; Lauermann, Iver ; Szyszka, Bernd (2019-01-15)

The crystallisation of sputter-deposited, amorphous In2O3:H films was investigated. The influence of deposition and crystallisation parameters onto crystallinity and electron hall mobility was explored. Significant precipitation of metallic indium was discovered in the crystallised films by electron energy loss spectroscopy. Melting of metallic indium at ~160 °C was suggested to promote primary...

The Influence of ITO Dopant Density on J-V Characteristics of Silicon Heterojunction Solar Cells: Experiments and Simulations

Kirner, Simon ; Hartig, Manuel ; Mazzarella, Luana ; Korte, Lars ; Frijnts, Tim ; Scherg-Kurmes, Harald ; Ring, Sven ; Stannowski, Bernd ; Rech, Bernd ; Schlatmann, Rutger (2015)

The TCO/a-Si:H(p) contact is a critical part of the silicon heterojunction solar cell. At this point, holes from the emitter have to recombine loss free with electrons from the TCO. Since tunneling is believed to be the dominant transport mechanism, a high dopant density in both adjacent layers is critical. In contrast to this, it has been reported that high TCO dopant density can reduce field ...