Magnetic-field-induced energy bandgap reduction of perovskite KMnF 3

et al. 2021

J. Phys. Chem. Lett.

Self Cite

Broad impact in the research community may be anticipated when a material's properties are capable of being manipulated artificially. Such a possibility has been explored here in the FAPbI 3 perovskite structure of perovskite solar cells, which involves undesirable phase transition at working temperature, despite many attempts to resolve the issue. Essential steps have been taken here toward solving this problem by adopting an opposite strategy to incorporate the water molecules into the perovskite structure under the current materials framework by new structural physics maneuvering. The secondary bonding of the perovskite structure has been relocated, which altered the microstructure to remove the internal strain that caused the phase transition, resulting in not only a 10-fold enhancement in the moisture/structure stability but also a bandgap comparable to that of the favored α-FAPbI 3 . All this opens an unprecedented avenue in perovskite research, which will hopefully be of intrinsic interest to the broad materials research community as well.

mentioning

confidence: 99%

Moisture-Stable FAPbI₃ Perovskite Achieved by Atomic Structure Negotiation

et al. 2021

J. Phys. Chem. Lett.

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“…[4][5][6][7] The PCE of perovskite solar cells based on this structure has been increased from 3.8% to 25.7% within a short period of time, opening a refreshing gate for renewable energy development. [8][9][10][11] However, the desired phase of FAPbI 3 (a-FAPbI 3 ) is not stable in the air at room temperature, and spontaneously transforms into a high bandgap phase (d-FAPbI 3 ) within several minutes, 12,13 placing a severe hindrance on commercialization. Even worse, other factors aggravate this problem, such as water moisture [14][15][16] and residue tensile strain in the perovskite films.…”

Section: Introductionmentioning

confidence: 99%

“…4–7 The PCE of perovskite solar cells based on this structure has been increased from 3.8% to 25.7% within a short period of time, opening a refreshing gate for renewable energy development. 8–11…”

Section: Introductionmentioning

confidence: 99%

The influence of compression on the lattice stability of α-FAPbI₃ revealed by numerical simulation

Zhang

et al. 2022

New J. Chem.

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“…Methylammonium lead iodide, with a chemical formula of MAPbI 3 , has been considered one of the most important OIHP materials [3]. It has been studied and reported that MAPbI 3 has many superior properties including long diffusion length [4,5], tunable bandgap [6,7] and high defect tolerance [8], which results in the rapid development of its power conversion efficiency (PCE) from 3.8% to 25.2% [9] within only ten years, making OIHP one of the most promising PV materials.…”

Section: Introductionmentioning

confidence: 99%

An Environmentally Stable Organic–Inorganic Hybrid Perovskite Containing Py Cation with Low Trap-State Density

Yang

et al. 2020

Crystals

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The commonly-employed methylammonium-based perovskites are environmentally unstable, which limits their commercialization. To resolve this problem, a stable hybrid perovskite, pyrrolidinium lead iodide (PyPbI3), was synthesized successfully via a simple drop casting method. The formed PyPbI3 exhibited a hexagonal structure. It presented not only excellent phase stability, but also low trap-state density, as confirmed via the X-ray diffraction and space-charge-limited currents measurements. This novel perovskite may be applicable to perovskite photovoltaics to improve their environmental stability.