Theoretical study on the tunable electronic band structure of CsPbICl/CsPbBr halide perovskite heterostructure driven by ferroelectric polarization modulation.

Ferroelectric polarizationhas been considered to be an key factor to tune the structural and photoelectric properties of perovskites and their heterostructures. While there has been growing researches made in the novel phenomena originating from interface formed between oxide perovskites, the effects of ferroelectric polarization on the electronic properties of halide perovskites and their heterostructures are rarely studied. Herein, by using first-principles calculations, all-inorganic halide perovskite heterostructure composed of 3D perovskite tetragonal CsPbBr and 2D Ruddlesden-Popper (RP) perovskite CsPbICl is constructed for disclosing the relationship between the intrinsic polarization of tetragonal CsPbBr and electronic band structure of heterostructure.

Transition of the Type of Band Alignments for All-Inorganic Perovskite van der Waals Heterostructures CsSnBr/WSSe.

In general, two-dimensional semiconductor-based van der Waals heterostructures (vdWHs) can be modulated to achieve the transition of band alignments (type-I, type-II, and type-III), which can be applied in different applications. However, it is rare in three-dimensional perovskite-based vdWHs, and it is challenging to achieve the tunable band alignments for a single perovskite-based heterostructure. Here, we systematically investigate the electronic and optical properties of all-inorganic perovskite vdWHs CsSnBr/WSSe based on density functional theory (DFT) calculation.

The influence of electrode for electroluminescence devices based on all-inorganic halide perovskite CsPbBr.

Electroluminescence devices based on all-inorganic halide perovskite material with excellent luminescence performance have been studied extensively in recent years. However, the important role for the electrodes of electroluminescence devices is payed few attention by theoretical and experimental studies. Appropriate electrodes can reduce the Schottky barrier height to decrease the energy loss, and prevent the metal impurities from diffusing into the perovskite material to generate deep traps levels, which improves the luminous efficiency and lifetime of devices.

Recent advances in cathode materials for rechargeable lithium-sulfur batteries.

Lithium-sulfur batteries (Li-S) are regarded as a promising candidate for next-generation energy storage systems due to their high specific capacity (1675 mA h g) and energy density (2600 W h kg) as well as the abundance, safety and low cost of sulfur materials. However, many disadvantages hinder the further development of Li-S batteries, such as the insulating nature of the active materials, the dissolution of intermediate products, large volume expansion and safety concerns related to metal lithium anodes. During the past decade, tremendous efforts have been made in the design and synthesis of electrode materials.

Antimony- and Bismuth-Based Chalcogenides for Sodium-Ion Batteries.

Sodium-ion batteries (SIBs) have received much attention, owing to their great potential for large-scale application. A lack of efficient anode materials with high reversible capacity is one main challenge facing the development of SIBs. Antimony- and bismuth-based chalcogenides materials can store large amounts of Na ions, owing to the alloying/dealloying reaction mechanism within a low potential range, and thus, are regarded as promising anodes for SIBs.

Publisher's Note: Breathers and rogue waves excited by all-magnonic spin-transfer torque [Phys. Rev. E 94, 042220 (2016)].

This corrects the article DOI: 10.1103/PhysRevE.94.

Breathers and rogue waves excited by all-magnonic spin-transfer torque.

In terms of Darboux transformation we investigate the dynamic process of spin wave passing through a magnetic soliton. It causes nonlinear excitations, such as Akhmediev breathers solution and Kuznetsov-Ma soliton. The former case demonstrates a spatial periodic process of a magnetic soliton forming the petal with four pieces.

[Phosphodiesterase type 5 inhibitors for lower urinary tract symptoms induced by benign prostatic hyperplasia: an update].

Medication has become the first-line option for the management of lower urinary tract symptoms induced by benign prostatic hyperplasia (LUTS/BPH) for its advantages in controlling the symptoms, inhibiting BPH progression, and reducing serious complications and surgical risks. Recent years have witnessed remarkable achievement in the studies of phosphodiesterase type 5 inhibitors (PDE5-Is) in the treatment of LUTS/BPH. PDE5-Is can effectively alleviate LUTS/BPH, with even better efficacy when combined with al-ARAs.

Low-threshold nanowire laser based on composition-symmetric semiconductor nanowires.

Low-threshold nanoscale lasers are attractive for their promising applications in highly integrated photonic devices and systems. Here we report the controllable growth of composition-symmetric CdS(x)Se(1-x) nanowires by using a multistep thermal evaporation route with moving sources. Microstructure analyses reveal the obtained wires are high-quality single crystals with the composition gradually changed from the center toward their both ends.

Color-changeable optical transport through Se-doped CdS 1D nanostructures.

The optical-transport properties of 1D Se-doped CdS nanostructures with different doping contents and/or crystallization degrees are reported. The locally excited photoluminescence shows a significant redshift during the transport along the long axis of the 1D structures and can leave enough PL intensity for detection. The magnitude of the redshift is found to be highly dependent on the content of doping and the crystallization degree.