Browsing by Author "Walter, A."
Now showing items 1-12 of 12
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1 cm(2) CH3NH3PbI3 mesoporous solar cells with 17.8% steady-state efficiency by tailoring front FTO electrodes
Afzaal, M.; Yates, H. M.; Walter, A.; Nicolay, S.; Ballif, C. (2017)In this article, we investigate the effects of atmospheric-pressure chemical vapour deposited fluorine doped tin oxide (FTO) thin films as front electrodes for the fabrication of mesoporous perovskite solar cells with an ... -
Atomic Layer Deposited Electron Transport Layers in Efficient Organometallic Halide Perovskite Devices
McCarthy, M. M.; Walter, A.; Moon, S. J.; Noel, N. K.; O''Brien, S.; Pemble, M. E.; et al. (2018)Amorphous TiO2 and SnO2 electron transport layers (ETLs) were deposited by low-temperature atomic layer deposition (AM. Surface morphology and x-ray photoelectron spectroscopy (ITS) indicate uniform and pinhole free coverage ... -
Closing the Cell-to-Module Efficiency Gap: A Fully Laser Scribed Perovskite Minimodule With 16% Steady-State Aperture Area Efficiency
Walter, A.; Moon, S. J.; Kamino, B. A.; Lofgren, L.; Sacchetto, D.; Matteocci, F.; et al. (2018)Organic-inorganic halide perovskite solar cells show increasing power conversion efficiencies, approaching the values of silicon-based devices. To date, however, most of the reported record efficiencies for perovskite solar ... -
Efficient Monolithic Perovskite/Silicon Tandem Solar Cell with Cell Area > 1 cm(2)
Werner, J.; Weng, C. H.; Walter, A.; Fesquet, L.; Seif, J. P.; De Wolf, S.; et al. (2016)Monolithic perovskite/crystalline silicon tandem solar cells hold great promise for further performance improvement of well-established silicon photovoltaics; however, monolithic tandem integration is challenging, evidenced ... -
Efficient Near-Infrared-Transparent Perovskite Solar Cells Enabling Direct Comparison of 4-Terminal and Monolithic Perovskite/Silicon Tandem Cells
Werner, J.; Barraud, L.; Walter, A.; Brauninger, M.; Sahli, F.; Sacchetto, D.; et al. (2016)Combining market-proven silicon solar cell technology with an efficient wide band gap top cell into a tandem device is an attractive approach to reduce the cost of photovoltaic systems. For this, perovskite solar cells are ... -
Instability of p-i-n perovskite solar cells under reverse bias
Razera, R.A.Z.; Jacobs, D. A.; Fu, F.; Fiala, P.; Dussouillez, M.; Sahli, F.; Yang, T.C.J.; Ding, L.; Walter, A.; Feil, A. F.; Boudinov, H. I.; Nicolay, S.; Ballif, C.; Jeangros, Q. (2020-01)Partial shading can trigger permanent damage in photovoltaic modules because the illuminated solar cells drive the shaded cells into reverse bias. Under reverse bias conditions, perovskite solar cells have been shown to ... -
Laser induced forward transfer of graphene
Smits, E. C. P.; Walter, A.; de Leeuw, D. M.; Asadi, K. (2017)Transfer of graphene and other two-dimensional materials is still a technical challenge. The 2D-materials are typically patterned after transfer, which leads to a major loss of material. Here, we present laser induced ... -
Perovskite/Perovskite/Silicon Monolithic Triple-Junction Solar Cells with a Fully Textured Design
Werner, J.; Sahli, F.; Fu, F.; Leon, J. J. D.; Walter, A.; Kamino, B. A.; et al. (2018)High efficiency triple-junction solar cells are currently made of III-IV semiconductors using expensive deposition methods. Perovskite/perovskite/silicon monolithic triple-junction solar cells could be a lower-cost alternative ... -
Perovskite/Silicon Tandem Solar Cells: Challenges Towards HighEfficiency in 4-Terminal and Monolithic Devices
Werner, J.; Sahli, F.; Kamino, B.; Sacchetto, D.; Brauninger, M.; Walter, A.; et al. (2017)Perovskite and silicon solar cells have recently been shown to be perfect partners for tandem devices with potentially very high efficiency at low additional costs over standard silicon cells. Here, we present the development ... -
Progression towards high efficiency perovskite solar cells via optimisation of the front electrode and blocking layer
Yates, H. M.; Afzaal, M.; Walter, A.; Hodgkinson, J. L.; Moon, S. J.; Sacchetto, D.; et al. (2016)The effects of a fluorine doped tin oxide (FTO) electrode, titanium dioxide (TiO2-x) blocking layer (BL) and perovskite (methyl ammonium lead triiodide) preparation on the overall properties of the photovoltaic cells have ... -
Roll to roll atmospheric pressure plasma enhanced CVD of titania as a step towards the realisation of large area perovskite solar cell technology
Hodgkinson, J. L.; Yates, H. M.; Walter, A.; Sacchetto, D.; Moon, S. J.; Nicolay, S. (2018)Atmospheric pressure plasma enhanced CVD (AP PECVD) systems have attracted considerable interest in recent years due to the significant benefits for large area, low cost substrates and low temperature operation. In this ... -
Zinc tin oxide as high-temperature stable recombination layer for mesoscopic perovskite/silicon monolithic tandem solar cells
Werner, J.; Walter, A.; Rucavado, E.; Moon, S. J.; Sacchetto, D.; Rienaecker, M.; et al. (2016)Perovskite/crystalline silicon tandem solar cells have the potential to reach efficiencies beyond those of silicon single-junction record devices. However, the high-temperature process of 500 degrees C needed for ...