M
Michael A. Hope
Researcher at École Polytechnique Fédérale de Lausanne
Publications - 35
Citations - 2983
Michael A. Hope is an academic researcher from École Polytechnique Fédérale de Lausanne. The author has contributed to research in topics: Perovskite (structure) & Chemistry. The author has an hindex of 10, co-authored 24 publications receiving 1020 citations. Previous affiliations of Michael A. Hope include University of Cambridge.
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Journal ArticleDOI
Pseudo-halide anion engineering for α-FAPbI3 perovskite solar cells.
Jaeki Jeong,Jaeki Jeong,Minjin Kim,Jongdeuk Seo,Haizhou Lu,Paramvir Ahlawat,Aditya Mishra,Yingguo Yang,Michael A. Hope,Felix Eickemeyer,Maengsuk Kim,Yung Jin Yoon,In Woo Choi,Barbara Primera Darwich,Seung Ju Choi,Yimhyun Jo,Jun Hee Lee,Bright Walker,Shaik M. Zakeeruddin,Lyndon Emsley,Ursula Rothlisberger,Anders Hagfeldt,Anders Hagfeldt,Dong Suk Kim,Michael Grätzel,Jin Young Kim +25 more
TL;DR: In this paper, the pseudo-halide anion formate (HCOO−) was used to suppress anion-vacancy defects that are present at grain boundaries and at the surface of the perovskite films.
Journal ArticleDOI
NMR reveals the surface functionalisation of Ti3C2 MXene
Michael A. Hope,Alexander C. Forse,Kent J. Griffith,Maria R. Lukatskaya,Michael Ghidiu,Yury Gogotsi,Clare P. Grey +6 more
TL;DR: The internal surface terminations of Ti3C2Tx MXene are identified and quantified and there are found to be significantly fewer -OH terminations than -F and -O, with the proportions highly dependent on the synthesis method.
Journal ArticleDOI
Crown Ether Modulation Enables over 23% Efficient Formamidinium-Based Perovskite Solar Cells.
Tzu-Sen Su,Tzu-Sen Su,Felix Eickemeyer,Michael A. Hope,Farzaneh Jahanbakhshi,Marko Mladenović,Jun Li,Zhiwen Zhou,Aditya Mishra,Jun-Ho Yum,Dan Ren,Anurag Krishna,Olivier Ouellette,Tzu-Chien Wei,Hua Zhou,Hsin-Hsiang Huang,Mounir Mensi,Kevin Sivula,Shaik M. Zakeeruddin,Jovana V. Milić,Anders Hagfeldt,Ursula Rothlisberger,Lyndon Emsley,Hong Zhang,Michael Grätzel +24 more
TL;DR: Crown ethers are employed to modulate perovskite films, affording passivation of undercoordinated surface defects, which reduces the concentration of surface electronic defects and suppresses nonradiative recombination, accompanied by enhanced stability under ambient and operational conditions.
Journal ArticleDOI
Ionic and Electronic Conduction in TiNb2O7.
Kent J. Griffith,Ieuan D. Seymour,Ieuan D. Seymour,Michael A. Hope,Megan M. Butala,Leo K. Lamontagne,Molleigh B. Preefer,Can P. Koçer,Graeme Henkelman,Andrew J. Morris,Matthew J. Cliffe,Matthew J. Cliffe,Siân E. Dutton,Clare P. Grey +13 more
TL;DR: Overall, lithium insertion leads to effective n-type self-doping of TiNb2O7 and high-rate conduction, while ionic motion is eventually hindered at high lithiation, indicating that this structure is specifically suited to Li+ mobility.
Journal ArticleDOI
Selective NMR observation of the SEI–metal interface by dynamic nuclear polarisation from lithium metal
Michael A. Hope,Bernardine L. D. Rinkel,Anna B. Gunnarsdóttir,Katharina Märker,Svetlana Menkin,Subhradip Paul,Ivan Sergeyev,Clare P. Grey +7 more
TL;DR: By exploiting the electrons in lithium metal to selectively hyperpolarise the NMR signals, the authors reveal the chemistry and spatial distribution of species at the metal–SEI interface.