W
Waqaas Rehman
Researcher at University of Oxford
Publications - 5
Citations - 3431
Waqaas Rehman is an academic researcher from University of Oxford. The author has contributed to research in topics: Perovskite (structure) & Halide. The author has an hindex of 4, co-authored 5 publications receiving 2758 citations. Previous affiliations of Waqaas Rehman include Airbus.
Papers
More filters
Journal ArticleDOI
A mixed-cation lead mixed-halide perovskite absorber for tandem solar cells
David P. McMeekin,Golnaz Sadoughi,Waqaas Rehman,Giles E. Eperon,Michael Saliba,Maximilian T. Hörantner,Amir A. Haghighirad,Nobuya Sakai,Lars Korte,Bernd Rech,Michael B. Johnston,Laura M. Herz,Henry J. Snaith +12 more
TL;DR: It is shown that using cesium ions along with formamidinium cations in lead bromide–iodide cells improved thermal and photostability and lead to high efficiency in single and tandem cells.
Journal ArticleDOI
Photovoltaic mixed-cation lead mixed-halide perovskites: links between crystallinity, photo-stability and electronic properties
Waqaas Rehman,David P. McMeekin,Jay B. Patel,Rebecca L. Milot,Michael B. Johnston,Henry J. Snaith,Laura M. Herz +6 more
TL;DR: In this paper, the authors show that high crystalline quality is a prerequisite for good optoelectronic quality and band gap stability of mixed-cation lead mixed-halide perovskite CsyFA (1−y)Pb(BrxI(1−x))3.
Journal ArticleDOI
Charge‐Carrier Dynamics and Mobilities in Formamidinium Lead Mixed‐Halide Perovskites
Waqaas Rehman,Rebecca L. Milot,Giles E. Eperon,Christian Wehrenfennig,Jessica L. Boland,Henry J. Snaith,Michael B. Johnston,Laura M. Herz +7 more
TL;DR: The mixed-halide perovskite FAPb(Bry I1-y )3 is attractive for color-tunable and tandem solar cells and bimolecular and Auger charge-carrier recombination rate constants strongly correlate with the Br content, y, suggesting a link with electronic structure.
Journal ArticleDOI
Crystallization Kinetics and Morphology Control of Formamidinium-Cesium Mixed-Cation Lead Mixed-Halide Perovskite via Tunability of the Colloidal Precursor Solution.
David P. McMeekin,Zhiping Wang,Waqaas Rehman,Federico Pulvirenti,Jay B. Patel,Nakita K. Noel,Michael B. Johnston,Seth R. Marder,Laura M. Herz,Henry J. Snaith +9 more
TL;DR: Using dynamic light scattering analysis, the dissolution of colloids over a time span triggered by the addition of hydrohalic acids is monitored and these colloids appear to provide nucleation sites for the perovskite crystallization, which critically impacts morphology, crystal quality, and optoelectronic properties.
Proceedings ArticleDOI
Recovery of high energy proton defects in GaInP2/GaAs/Ge triple junction solar cells by isothermal annealing
Christian Brandt,Waqaas Rehman,Claus G. Zimmermann,Stephen Taylor,Carsten Baur,Thomas Andreev +5 more
TL;DR: In this paper, defect recovery of high energy proton irradiated GaInP2/GaAs/Ge triple junctions cells and related component cells by isothermal annealing is reported.