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17 results on '"Emara, Jennifer"'

8. Tuning Hyrbrid Ferroelectric and Antiferroelectric Stacks for Low Power FeFET and FeRAM Applications by Using Laminated HSO and HZO films

Author

Ali, Tarek, primary, Lehninger, David, additional, Lederer, Maximilian, additional, Li, Songrui, additional, Kühnel, Kati, additional, Mart, Clemens, additional, Mertens, Konstantin, additional, Hoffmann, Raik, additional, Olivo, Ricardo, additional, Emara, Jennifer, additional, Biedermann, Kati, additional, Metzger, Joachim, additional, Binder, Robert, additional, Czernohorsky, Malte, additional, Kämpfe, Thomas, additional, Müller, Johannes, additional, Seidel, Konrad, additional, and Eng, Lukas M., additional

Published
2022
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10. RF-Characterization of HZO Thin Film Varactors

Author

Abdulazhanov, Sukhrob, primary, Le, Quang Huy, additional, Huynh, Dang Khoa, additional, Wang, Defu, additional, Lederer, Maximilian, additional, Olivo, Ricardo, additional, Mertens, Konstantin, additional, Emara, Jennifer, additional, Kämpfe, Thomas, additional, and Gerlach, Gerald, additional

Published
2021
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12. Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Author

Schnier, Tobias, Emara, Jennifer, Olthof, Selina, Meerholz, Klaus, Schnier, Tobias, Emara, Jennifer, Olthof, Selina, and Meerholz, Klaus

Abstract

Hybrid organic/inorganic halide perovskites have lately been a topic of great interest in the field of solar cell applications, with the potential to achieve device efficiencies exceeding other thin film device technologies. Yet, large variations in device efficiency and basic physical properties are reported. This is due to unintentional variations during film processing, which have not been sufficiently investigated so far. We therefore conducted an extensive study of the morphology and electronic structure of a large number of CH3NH3PbI3 perovskite where we show how the preparation method as well as the mixing ratio of educts methylammonium iodide and lead(II) iodide impact properties like film formation, crystal structure, density of states, energy levels, and ultimately the solar cell performance.

Published
2017

14. Impact of Film Stoichiometry on the Ionization Energy and Electronic Structure of CH3NH3PbI3 Perovskites

Author

Emara, Jennifer, Schnier, Tobias, Pourdavoud, Neda, Riedl, Thomas, Meerholz, Klaus, Olthof, Selina, Emara, Jennifer, Schnier, Tobias, Pourdavoud, Neda, Riedl, Thomas, Meerholz, Klaus, and Olthof, Selina

Abstract

The electronic structure of a large sample set of CH3NH3PbI3-based per-ovskites is studied. Combined investigations by UV/X-ray photoelectron spectroscopy and X-ray diffraction reveal that interstitials present in the film lead to changes in the occupied density of states close to the valence band, which in turn influences the performance of solar cells. Changes in elemental composition tune the ionization energy of the perovskite film by almost 1 eV with-out introducing significant amounts of gap states.

Published
2016

17. Impact of Film Stoichiometry on the Ionization Energy and Electronic Structure of CH3 NH3 PbI3 Perovskites.

Author

Emara J, Schnier T, Pourdavoud N, Riedl T, Meerholz K, and Olthof S

Abstract

The electronic structure of a large sample set of CH3 NH3 PbI3 -based perovskites is studied. Combined investigations by UV/X-ray photoelectron spectroscopy and X-ray diffraction reveal that interstitials present in the film lead to changes in the occupied density of states close to the valence band, which in turn influences the performance of solar cells. Changes in elemental composition tune the ionization energy of the perovskite film by almost 1 eV without introducing significant amounts of gap states., (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2016
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