Abstract The incorporation of impurity ions or doping is a promising method for controlling the electronic and optical properties structural stability halide perovskite nanocrystals (NCs). Herein, we establish relationships between rare‐earth intrinsic emission lead‐free double Cs 2 AgInCl 6 NCs to impart tune performances in visible light region. Tb 3+ were incorporated into occupied In sites as verified by both crystallographic analyses first‐principles calculations. Trace amounts Bi...

Abstract The halide double perovskite family represented by A 2 (B + ,B 3+ )X 6 can overcome the lead toxicity and enable generally large band gap engineering via B/B sites' transmutation or exotic dopants to fulfill emerging applications in optoelectronic fields. Herein, design experimental synthesis of a new Mn 2+ ‐doped Cs NaBi 1‐ x In Cl crystals with an intense orange‐yellow emission are reported, phase formation stability is discussed combined experimental–theoretical approach....

Abstract Lead‐free and stable Sn halide perovskites demonstrate tremendous potential in the field of optoelectronic devices. Here, structure optical properties “defect” Cs 2 SnCl 6− x Br are reported, as well their use photodetector materials. Millimeter‐sized single crystals grown by hydrothermal method, with body color continuously changing from transparent to yellow finally dark red. Narrowband single‐crystal photodetectors using presented, which show a high detectivity ≈2.71 × 10 Jones,...

Herein, we prepare a consisting of the framework Cu-MOF anchored on graphitic carbon nitride (Cu-MOF/C3N5) nanomaterial for antioxidants sensing. The photocatalytic efficiency was statistically increased by doping...

The anti-site defect model was established to investigate transposition influence on the optical and electronic properties of double-perovskite Cs₂AgSbCl₆.

Abstract New 2D materials with low‐symmetry structures aroused great interest in developing monolithic polarization‐sensitive photodetectors small volumes, which can provide a new degree of freedom for more information night, fog, and smoke environments. However, at least half them presented anisotropy an anisotropic factor (≈2) photocurrent up to now. Herein, after systematic investigation the optical anisotropies GeSe nanosheets, novel self‐driven imaging photodetector excellent...

A supersaturation of nitrogen atoms is found in the surface layer microstructured silicon after femtosecond (fs) laser irradiation NF3. The average concentration uppermost 50 nm about 0.5 ± 0.2 at. %, several orders magnitude higher than solid solubility silicon. nitrogen-hyperdoped shows high crystallinity doped layer, which due to repairing effect on defects lattices. Nitrogen and vacancies can be combined into thermal stable complexes fs irradiation, makes exhibit good stability optical...

Semiconducting molybdenum ditelluride (2H-MoTe2), a two-dimensional (2D) transition metal dichalcogenide, has attracted extensive research attention due to its favorable physical properties for future electronic devices, such as appropriate bandgap, ambipolar transport characteristic, and good chemical stability. The rational tuning of is key point achieve MoTe2-based complementary optoelectronic devices. Herein, we demonstrate the dynamic effective control few-layer MoTe2, through in situ...

Doping or alloying in perovskites and perovskite variants provides a promising way for modulating the electronic photoluminescence properties structural stability.

Conventional doping schemes of silicon (Si) microelectronics are incompatible with atomically thick two-dimensional (2D) transition metal dichalcogenides (TMDCs), which makes it challenging to construct high-quality 2D homogeneous p-n junctions. Herein, we adopt a simple yet effective plasma-treated method seamlessly lateral WSe2 homojunction. ambipolar transport properties was exposed O2 plasma form WOx on the surface in self-limiting process that induces hole underlying WSe2via electron...

Arrays of high-quality crystalline conical spikes were formed on silicon surface in the presence NF3 with femtosecond laser irradiation. The structures is smooth, and Raman scattering spectroscopy shows that few polymorphs such as a-Si, Si-XII, Si-III observed structures. In mid-infrared wavelength range 3–16 µm, structured exhibits a high absorptance up to 0.8. Additionally, sample remains almost unchanged after annealing process. These properties will make it promising material for...

We study the optimal investment strategies of DC pension, with stochastic interest rate (including CIR model and Vasicek model) salary. In our model, plan member is allowed to invest in a risk-free asset, zero-coupon bond, single risky asset. By applying Hamilton-Jacobi-Bellman equation, Legendre transform, dual theory, we find explicit solutions for CRRA CARA utility functions, respectively.

Abstract The incorporation of impurity ions or doping is a promising method for controlling the electronic and optical properties structural stability halide perovskite nanocrystals (NCs). Herein, we establish relationships between rare‐earth intrinsic emission lead‐free double Cs 2 AgInCl 6 NCs to impart tune performances in visible light region. Tb 3+ were incorporated into occupied In sites as verified by both crystallographic analyses first‐principles calculations. Trace amounts Bi...

Black phosphorus (BP) has a pressure-dependent bandgap width and shows the potential for applications as low-dimensional pressure sensor. We built two kinds of pure BP devices with zigzag or armchair conformation, explored their conductance in detail by using first principles calculations. The exhibit different conductance-pressure relationships. For is robust against stress when out-of-plane ratio less than 15%, then increases rapidly until conductive channels are fully opened. decreases at...

In this paper, we have introduced the auxetic effect in black phosphorus (BP) analog Sb and achieved modulations monolayer As via first-principles calculations. Compared with As, is phonon unstable. By applying uniaxial strain along each direction, discovered zigzag-vertical reversibility on out-of-plane auxeticity, negative Poisson's ratios for were simulated to be -0.125/-0.172 -0.036/-0.063, respectively, by zigzag/vertical directions. The ratio could significantly manipulated a vertical...

Black phosphorus (BP), a single elemental two-dimensional (2D) material with sizable band gap, meets several critical requirements in the development of future nanoelectronic applications. This work reports ambipolar characteristics few-layer BP, induced using 2D transparent hexagonal boron nitride (h-BN) capping. The h-BN capping have advantages over conventional Al2O3 flexible and device technique was used to achieve an electron mobility BP devices 73 cm2V-1s-1, thereby demonstrating...

A first-principles calculation of the structural stability and mechanical property Ni(111)–graphene–Ni(111) layered composite was presented. Three different models were considered, most stable interfacial structure had been determined with top–fcc in both sides graphene. Stretching calculations demonstrate that tensile stress can reach twice pure Ni ranges 0–0.2 strain. The Young's modulus triaxial directions are 384 (x), 362 (y), 303 (z) GPa for structure, 212 251 273 single-crystal Ni(111).