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Amita Ummadisingu
Researcher at École Polytechnique Fédérale de Lausanne
Publications - 25
Citations - 5372
Amita Ummadisingu is an academic researcher from École Polytechnique Fédérale de Lausanne. The author has contributed to research in topics: Perovskite (structure) & Formamidinium. The author has an hindex of 17, co-authored 24 publications receiving 4189 citations. Previous affiliations of Amita Ummadisingu include Birla Institute of Technology and Science.
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Journal ArticleDOI
Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance
Michael Saliba,Taisuke Matsui,Taisuke Matsui,Konrad Domanski,Ji-Youn Seo,Amita Ummadisingu,Shaik M. Zakeeruddin,Juan-Pablo Correa-Baena,Wolfgang Tress,Antonio Abate,Anders Hagfeldt,Michael Grätzel +11 more
TL;DR: This work shows that the small and oxidation-stable rubidium cation (Rb+) can be embedded into a “cation cascade” to create perovskite materials with excellent material properties and achieved stabilized efficiencies of up to 21.6% on small areas.
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Boosting the performance of Cu2O photocathodes for unassisted solar water splitting devices
Linfeng Pan,Jin Hyun Kim,Matthew T. Mayer,Min Kyu Son,Min Kyu Son,Amita Ummadisingu,Jae Sung Lee,Anders Hagfeldt,Jingshan Luo,Jingshan Luo,Michael Grätzel +10 more
TL;DR: Luo et al. as mentioned in this paper reported a photocathode with a coaxial nanowire structure implementing a Cu2O/Ga2O3-buried p-n junction that achieves an external quantum yield for hydrogen generation close to 80%.
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Enhancing Efficiency of Perovskite Solar Cells via N-doped Graphene: Crystal Modification and Surface Passivation.
Mahboobeh Hadadian,Mahboobeh Hadadian,Juan-Pablo Correa-Baena,Elaheh Kafshdare Goharshadi,Amita Ummadisingu,Ji-Youn Seo,Jingshan Luo,Somayeh Gholipour,Somayeh Gholipour,Shaik M. Zakeeruddin,Michael Saliba,Antonio Abate,Antonio Abate,Michael Grätzel,Anders Hagfeldt +14 more
TL;DR: This study incorporates N-doped graphene nanosheets in the perovskite layer, which simultaneously induces an improved morphology and surface passivation at the perOVskite/spiro interface, resulting in enhancement in all photovoltaic parameters.
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The effect of illumination on the formation of metal halide perovskite films
Amita Ummadisingu,Ludmilla Steier,Ji-Youn Seo,Taisuke Matsui,Antonio Abate,Wolfgang Tress,Michael Grätzel +6 more
TL;DR: It is shown that light has a strong influence on the rate of perovskite formation and on film morphology in both of the main deposition methods currently used: sequential deposition and the anti-solvent method.
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11% efficiency solid-state dye-sensitized solar cells with copper(II/I) hole transport materials
Yiming Cao,Yasemin Saygili,Amita Ummadisingu,Joël Teuscher,Jingshan Luo,Norman Pellet,Fabrizio Giordano,Shaik M. Zakeeruddin,Jacques-E. Moser,Marina Freitag,Anders Hagfeldt,Michael Grätzel +11 more
TL;DR: A record 11% stable solid-state dye-sensitized solar cell under standard air mass 1.5 global is reported using a hole-transport material composed of a blend of amorphous Cu(II/I) conductors that conduct holes by rapid hopping infiltrated in a 6.5 μm-thick mesoscopic TiO2 scaffold.