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Morphological Control for High Performance, Solution‐Processed Planar Heterojunction Perovskite Solar Cells
Organometal trihalide perovskite based solar cells have exhibited the highest efficiencies to‐date when incorporated into mesostructured composites. However, thin solid films of a perovskite absorber
Efficient organometal trihalide perovskite planar-heterojunction solar cells on flexible polymer substrates.
It is demonstrated that a single thin film of the low-temperature solution-processed organometal trihalide perovskite absorber CH3NH3PbI3-xClx, sandwiched between organic contacts can exhibit devices with power-conversion efficiency of up to 10% on glass substrates and over 6% on flexible polymer substrates.
Bright light-emitting diodes based on organometal halide perovskite.
It is shown, using photoluminescence studies, that radiative bimolecular recombination is dominant at higher excitation densities, Hence, the quantum efficiencies of the perovskite light-emitting diodes increase at higher current densities.
Reversible Hydration of CH3NH3PbI3 in Films, Single Crystals, and Solar Cells
Solar cells composed of methylammonium lead iodide perovskite (MAPI) are notorious for their sensitivity to moisture. We show that (i) hydrated crystal phases are formed when MAPI is exposed to water
Electron mobility and injection dynamics in mesoporous ZnO, SnO₂, and TiO₂ films used in dye-sensitized solar cells.
A comparative study of electron mobility and injection dynamics in thin films of TiO, ZnO, and SnO(2) nanoparticles sensitized with Z907 ruthenium dye concludes that these injection dynamics are not substantially influenced by bulk energy level offsets but rather by the local environment of the dye-nanoparticle interface that is governed by dye binding modes and densities of states available for injection.
Highly stable, phase pure Cs2AgBiBr6 double perovskite thin films for optoelectronic applications
Hybrid lead halide perovskites have emerged as high-performing semiconductors for optoelectronic applications such as photovoltaics. However, their toxicity and stability issues represent significant
Lithium salts as "redox active" p-type dopants for organic semiconductors and their impact in solid-state dye-sensitized solar cells.
The doping mechanism consumes Li(+) during the device operation, which poses a problem, since the lithium salt is required at the dye-sensitized heterojunction to enhance charge generation, and highlights that new additives are required to maximize the performance and the long-term stability of ss-DSSCs.
High-performance perovskite-polymer hybrid solar cells via electronic coupling with fullerene monolayers.
The C60SAM functionalization of mesoporous TiO2 is used to achieve an 11.7% perovskite-sensitized solar cell using Spiro-OMeTAD as a transparent hole transporter and this strategy allows a reduction of energy loss, while still employing a "mesoporous electron acceptor".
Preparation of Single-Phase Films of CH3NH3Pb(I1-xBrx)3 with Sharp Optical Band Edges.
A bromide-iodide lead perovskite film is demonstrated with an optical bandgap of 1.94 eV, which is optimal for tandem cells of these materials with crystalline silicon devices.
Stabilization of the Trigonal High-Temperature Phase of Formamidinium Lead Iodide.
The results show that employing a mixture of MAI and FAI in films deposited via a two-step approach, where the MAI content is <20%, results in the exchange of FA molecules with MA without any significant lattice shrinkage, and with temperature-dependent X-ray diffraction that the trigonal phase exhibits no phase changes in the temperature range studied.