perovskitePerovskite materials have been widely used to fabricate solar cells, laser diodes and other photodevices, owing to the advantage of high absorption coefficient, long carrier life and shallow defect energy levels. However, due to easy hydrolysis, it is difficult to fabricate ...
Here we adopt lithium chemical doping in two-dimensional phenethylammonium lead bromide (PEA)PbBrperovskite crystals to improve the properties and add functionalities with other radiation detections. Li doping is confirmed by X-ray photoemission spectroscopy and the scintillation mechanisms are explored via...
Our analysis reveals a light-induced ultrafast reduction in antiferro-distortion resulting from a strong interaction between the electron–hole plasma and perovskite lattice, which induces an in-plane octahedra rotation towards a more symmetric phase. Correlated ultrafast spectroscopy performed at the same...
The bottom interface refers to the interface between the transparent electrode and the perovskite layer. For a regular device, the bottom interface includes the interfaces of transparent electrode/ETL and ETL/perovskite. Therefore, the main function of the bottom interface is to extract electrons from...
Here we show that large single-crystalf l akes of two-dimensional layered perovskite are able to sustain strong polariton nonlinearities atroom temperature with no need to be embedded in an optical cavity. In particular, exciton-exciton interaction energies are measured to be remarkably similar to ...
Since the first introduction of metal halide perovskite materials in solar cells in 2009, [8] the certified power conversion efficiencies (PCEs) of small-area (0.096 cm2) PSCs have now reached 25.7%, approaching that of monocrystalline silicon solar cells (26.1%, single crystal, 3.9857 cm2,...
13 This places an upper limit on the thickness of the 2D film (∼220 nm) resulting in inefficient light absorption in comparison with a 3D perovskite film with >500 nm thickness.16, 17, 18 Second, thin films exhibit heterogeneity in the layer thickness (also known as phase purity or n...
“We discover that MXenes, owing to their unique two-dimensional structure, can be used to tune surface properties of perovskite permitting a new optimization strategy for this III-generation solar cell.”— Professor Di Carlo Thin film perovskite solar cell has a sandwich structure, where charge...
Two-dimensional (2D) and three-dimensional (3D) perovskite heterostructures have played a key role in advancing the performance of perovskite solar cells1,2. However, the migration of cations between 2D and 3D layers results in the disruption of octahedr
With extraordinarily high efficiency, low cost, and excellent stability, 2D perovskite has demonstrated a great potential to revolutionize photovoltaics technology. However, inefficient material structure representations have significantly hindered artif