Apr 12, 2024 · Here we report the growth of millimeter-sized 2D PbI 2 single crystals at the water-air interface. The growth mechanism is based on an inherent ion-specific preference, i.e. iodine and lead...

Large-scale PbI 2 monolayers and few layers with high crystallinity and a uniform hexagonal shape were synthesized via a facile physical vapour deposition (PVD) method.

Jul 17, 2018 · Heterostructures based on graphene and other 2D atomic crystals exhibit fascinating properties and intriguing potential in flexible optoelectronics, where graphene films function as transparent electrodes and other building blocks are used as photoactive materials.

Sep 14, 2016 · A new, simple, and replicable solution method is reported for the growth of 2D materials. Importantly, the method has no particular requirement on the substrate, so metals, glass, silicon, sapphire, flexible organics, and other wafers insoluble in …

Dec 3, 2019 · Here we chemically synthesize few-layer PbI 2 flakes and nanoparticles, which demonstrate unique exciton properties that have rare counterparts in other 2D semiconductors. For three layers and more, the single PbI 2 flakes can be utilized to show how the bandgap energy of a 2D semiconductor evolves with the changing layer thickness.

Feb 10, 2020 · Lead Iodide (PbI 2) is a large bandgap 2D layered material that has potential for semiconductor applications. However, atomic level study of PbI 2 monolayer has been limited due to challenges...

Dec 30, 2017 · Two-dimensional (2D) PbI 2 flakes have been attracting intensive attention as one potential candidate for the modern optoelectronics. However, suffered from the instability of kinetics-driven growth, the fabricated 2D PbI 2 flakes have a wide dimensional distribution even under the same conditions.

Feb 8, 2019 · Here we report a 2D material lead iodide (PbI 2) mutilayer with a direct band gap and find by photoluminescence (PL) measurements that it maintains a direct bandgap nature under a large experimental strain up to 7.69%. Theoretical simulations support and explain well our experimental results.

Dec 15, 2023 · Here, BA 2 PbI 4 is employed to regulate the crystallization of PbI 2, acting as nucleation centers. As a result, porous PbI 2 film with high crystallinity is obtained, which allows the realization of perovskite film with preferential crystal orientations of …

The uncovered 2D to 3D structural transition in 2H-PbI 2 advances the understanding of structural stability of 2H-type layered semiconductors and lead halide perovskite.