Topic
Plumbate
About: Plumbate is a research topic. Over the lifetime, 149 publications have been published within this topic receiving 1842 citations. The topic is also known as: plumbates.
Papers published on a yearly basis
Papers
TL;DR: In this article, the authors investigated the nature of perovskite absorption features and optical properties and proposed a band structure composed of two distinct transitions that is consistent with the various spectral features and kinetic behavior of the CH3NH3PbI3 excited state.
Abstract: The rapid increase in efficiency of methylammonium lead halide perovskite solar cells necessitates further investigation into the nature of perovskite absorption features and optical properties. Films obtained from the deposition of solutions containing lead halides and the CH3NH3+ organic cation is known to yield the CH3NH3PbI3 perovskite structure upon annealing. In examining the precursor solution used in the processing of CH3NH3PbI3 solar cells, we find that Pb2+ readily forms plumbate complexes in the presence of excess iodide ions and exhibits characteristic absorption bands at 370 (PbI3−) and 425 nm (PbI42−). Through comparative spectral analysis of the absorption features of charge transfer complexes in the solution phase and the final solid-state perovskite films, we are able to fully classify the absorption features in the excited state of CH3NH3PbI3 across the transient absorption spectrum recorded following laser pulse excitation. In particular, we attribute the broad photoinduced absorption to a charge-transfer excited state, and show correlation between the photoinduced absorption and 480 nm bleach signals. These observations lead us to propose a band structure composed of two distinct transitions that is consistent with the various spectral features and kinetic behavior of the CH3NH3PbI3 excited state. Characterization of this unique dual excited state nature provides further insight into the optoelectronic behavior of hybrid lead halide perovskite films and thus aids in elucidating their exceptional photovoltaic properties.
404 citations
TL;DR: The whole process of the lead perovskite synthesis consists of a series of equilibria driven by reversible solvent participation involving a polymeric strip of plumbate(II) oligomer as a key intermediate, which will help to rationalize the photovoltaic device studies that have so far remained empirical and to open a new venue to a developing field of microscale lead pervskite devices.
Abstract: Despite tremendous progress in optoelectronic devices using lead perovskite (CH3NH3+PbI3–), there has been a paucity of mechanistic information on how photoactive micron-sized crystals of lead perovskite grow from a mixture of a layered crystal of lead(II) iodide and methylammonium iodide mediated by a polar solvent, DMSO or DMF. We report here that the whole process of the lead perovskite synthesis consists of a series of equilibria driven by reversible solvent participation involving a polymeric strip of plumbate(II) oligomer as a key intermediate. A significant finding includes quick decomposition of perovskite crystal upon exposure to DMSO or DMF at room temperature, where the solvent molecules act as a base to remove acidic ammonium iodide from the perovskite crystal. This observation accounts for the difficulty in controlling perovskite solar cell fabrication. Overall, the polar solvent is indispensible first to degrade a 2-D sheet of crystals of lead(II) iodide into 1-D fibrous intermediates and th...
257 citations
TL;DR: It is concluded that strongly coordinating Solvents will preferentially form species with a low number of iodide ions and less coordinative solvents generate high concentration of PbI6 (-) and proposed that all these plumbate ions may act as structural defects determining electronic properties of the photovoltaic films.
Abstract: We show the influence of species present in precursor solution during formation of lead halide perovskite materials on the structural defects of the films. The coordination of lead by competing solvent molecules and iodide ions dictate the type of complexes present in the films. Depending on the processing conditions all PbIS5+, PbI2S4, PbI3S3−, PbI4S22−, PbI5S23−, PbI64−and 1D (Pb2I4)n chains are observed by absorption measurements. Different parameters are studied such as polarity of the solvent, concentration of iodide ions, concentration of solvent molecules and temperature. It is concluded that strongly coordinating solvents will preferentially form species with a low number of iodide ions and less coordinative solvents generate high concentration of PbI6−. We furthermore propose that all these plumbate ions may act as structural defects determining electronic properties of the photovoltaic films.
184 citations
TL;DR: In this article, a laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to characterize the slip surfaces on specimens of a famous Mesoamerican tradeware known as Plumbate.
117 citations
TL;DR: In this article, the title compound, [(S)-C6H5C2H4NH3][PbBr3], crystallizes as an organic-inorganic hybrid.
Abstract: The title compound, [(S)-C6H5C2H4NH3][PbBr3], crystallizes as an organic–inorganic hybrid As such, the structure consists of extended chains of [PbBr3]− units running along the a axis Each Pb atom is octahedrally coordinated by six bromides, arranged as chains of face-sharing octahedra These inorganic chains are separated by the isolated organic cations
93 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 4 |
| 2019 | 3 |
| 2018 | 1 |
| 2017 | 6 |
| 2016 | 9 |
| 2015 | 5 |