Ultrafast Process

Jul 25, 2024 | link.aps.org | Jun Luo |Biao Liu |Ultrafast Process

Two-dimensional (2D) metal halide perovskites have garnered significant attention in the field of light-emitting diodes due to their high photoluminescence quantum yield and tunability. In comparison with the widely studied 2D Ruddlesden-Popper (RP) perovskites, the 2D Dion-Jacobson (DJ) double perovskites, which offer higher stability and nontoxicity, have received relatively less attention.

Apr 25, 2024 | pubs.aip.org | Ultrafast Process |S. Tian |Linhao Li

Topics Wearable technology, Electronic devices, Transistors, Polymer electrolyte Flexible electronic devices are realized by preparing functional components made of organic/inorganic materials on flexible substrates, which have excellent flexibility while ensuring normal operating conditions, and extend to properties such as stretchability and healability.1 Polymeric materials, such as the most widely used polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), polyimide (PI), and poly...

Dec 19, 2023 | link.aps.org | Zhenzhong Lian |Ultrafast Process |Zhou Chen

The observation of molecular rotational dynamics induced by ultrashort laser pulses is of both fundamental and practical importance. Here, we develop an extended weak-field polarization method that allows us to visualize the two-dimensional spatial rotation of molecules. By manipulating the polarization direction of the pump pulse, this method allows for characterizing the rotational dependence on the azimuth angle when a weak probe pulse is present.

Aug 18, 2023 | link.aps.org | Jun Luo |Biao Liu |Ultrafast Process

The synthesized two-dimensional (2D) Ruddlesden-Popper (RP) all-inorganic mixed halogen perovskite, Cs2PbIxCl4−x (x = 2) has attracted extensive attention due to its excellent luminescence properties and environmental stability. However, the regulation of halogen ratio and halogen replacement sites on the luminescence properties of 2D RP inorganic mixed halogen perovskite remains unknown.

Jul 12, 2023 | link.aps.org | Yongsong Wang |Ultrafast Process |Bo Chen

Abstract The ternary chalcogenide superconductor Bi2Rh3Se2 was discovered to have charge density wave (CDW) order and electron-phonon coupling (EPC). However, it is still debated whether the phase transition at ∼240K is a CDW one. Here, we systematically performed Raman scattering investigations on single-crystal Bi2Rh3Se2. Angle-resolved polarized Raman spectroscopic measurements reveal the in-plane anisotropic EPC in Bi2Rh3Se2, which inhibits the Raman intensity.