Results 21 to 30 of about 2,713 (215)
Pressure-Induced Locking of Methylammonium Cations Versus Amorphization in Hybrid Lead Iodide Perovskites [PDF]
Proceedings of the nanoGe Fall Meeting 2018, 2018 The structural phase behavior of high-quality single crystals of methylammonium lead iodide (CH3NH3PbI3 or MAPbI3) was revisited by combining Raman scattering and photoluminescence (PL) measurements under high hydrostatic pressure up to ca. 10 GPa.
Adrián Francisco-López +7 more
openaire +2 more sources
Coupling Methylammonium and Formamidinium Cations with Halide Anions: Hybrid Orbitals, Hydrogen Bonding, and the Role of Dynamics [PDF]
The Journal of Physical Chemistry C, 2021 The electronic structures of four precursors for organic inorganic hybrid perovskites, namely, methylammonium chloride and iodide, as well as formamidinium bromide and iodide, are investigated by X-ray emission (XE) spectroscopy at the carbon and nitrogen K-edges. The XE spectra are analyzed based on density functional theory calculations.
Kamal, Chinnathambi +7 more
openaire +5 more sources
Large guanidinium cation mixed with methylammonium in lead iodide perovskites for 19% efficient solar cells [PDF]
Nature Energy, 2017 AbstractOrganic–inorganic lead halide perovskites have shown photovoltaic performances above 20% in a range of solar cell architectures while offering simple and low-cost processability. Despite the multiple ionic compositions that have been reported so far, the presence of organic constituents is an essential element in all of the high-efficiency ...
Alexander D. Jodlowski +9 more
openaire +5 more sources
New Journal of Physics, 2018 We have developed a multi-scale model for organic–inorganic hybrid perovskites (HPs) that applies quantum mechanical (QM) calculations of small HP supercell models to large coarse-grained structures.
Jari Järvi, Jingrui Li, Patrick Rinke
doaj +1 more source
Comparing the excited-state properties of a mixed-cation–mixed-halide perovskite to methylammonium lead iodide [PDF]
The Journal of Chemical Physics, 2020 Organic–inorganic perovskites are one of the most promising photovoltaic materials for the design of next generation solar cells. The lead-based perovskite prepared with methylammonium and iodide was the first in demonstrating high power conversion efficiency, and it remains one of the most used materials today.
Jan C. Brauer +12 more
openaire +5 more sources
Role of A‐Site Composition in Charge Transport in Lead Iodide Perovskites
Advanced Energy & Sustainability Research, 2022 As the power conversion efficiency and stability of solar cells based on metal halide perovskites continue to improve, the community increasingly relies on compounds formed of mixed cations and mixed halides for the highest performing devices. The result
Min Ji Hong, John G. Labram
doaj +1 more source
Advanced Science, 2021 Replacing methylammonium (MA+), formamidine (FA+), and/or cesium (Cs+) in 3D metal halide perovskites by larger organic cations have built a series of low‐dimensional metal halide perovskites (LDMHPs) in which the inorganic metal halide octahedra ...
Ying Han, Sijia Yue, Bin‐Bin Cui
doaj +1 more source
Design Principles of Large Cation Incorporation in Halide Perovskites
Molecules, 2021 Perovskites have stood out as excellent photoactive materials with high efficiencies and stabilities, achieved via cation mixing techniques. Overcoming challenges to the stabilization of Perovskite solar cells calls for the development of design ...
Heesoo Park +3 more
doaj +1 more source
Understanding the interplay of stability and efficiency in A-site engineered lead halide perovskites
APL Materials, 2020 Organic–inorganic hybrid lead halide perovskites have gained significant attention as light-harvesting materials in thin-film photovoltaics due to their exceptional optoelectronic properties and simple fabrication process. The power conversion efficiency
Feray Ünlü +9 more
doaj +1 more source
Using Imidazolium in the Construction of Hybrid 2D and 3D Lead Bromide Pseudoperovskites
Chemistry, 2023 The field of hybrid organic–inorganic perovskite materials continues to attract the interest of the scientific community due to their fascinating properties and the plethora of promising applications in photovoltaic and optoelectronic devices. To enhance
Gonzalo García-Espejo +3 more
doaj +1 more source