New water-soluble and highly luminescent ZnSe/ZnS core/shell quantum dots with tunable emission ranging between 390 and 460 nm were synthesized via a two-step method.

The cover picture illustrates how the optical properties of InP/ZnSe/ZnS quantum dots (QDs) can be modulated by controlling thickness ZnSe intermediate shells. circles in top left, center, and bottom right represent QDs with thick, middle, thin shells, respectively. Upon excitation blue light, they emit different colors intensities depending on number photons entering exiting QDs. A model QD is...

Large ZnSe nanocrystals are expected to be promising blue-light emitters with an emission peak of 455–475 nm, which is important for the construction display apparatus. The final size via one-step injection can varied by reactivity Zn and Se precursors; however, it has a limit <5 nm. To describe key factors in determining nanocrystals, we proposed nuclei number-considered LaMer model based on M...

Compared with monometallic selenides, heterogeneous bimetallic selenides have rich phase boundaries and superior electrical conductivity. ZnSe/CoSe2 composites were prepared by introducing Zn metal using ZIF-8/67 as the precursor through synergistic effect between Co after selenification. The electrocatalytic conversion of polysulfide is accelerated ZnSe chemical adsorption catalytic effect. co...

Solar‐driven photoelectrochemical (PEC) water splitting cell fabricated using colloidal quantum dots (QDs) is deemed as low‐cost and high‐efficiency solar‐to‐fuel conversion systems for future carbon neutrality. However, current QDs‐based PEC technologies are still hindered by several critical restrictions including the sluggish oxidation kinetics frequent use of highly toxic QDs (e.g., Pb, Cd‐...

The carbon-encapsulated, Mn-doped ZnSe (Zn1 xMnxSe@C) nanowires, nanorods, and nanoparticles are synthesized by the solvent-free, one-step RAPET (reactions under autogenic pressure at elevated temperature) approach. The aspect ratio of the nanowires/nanorods is altered according to the Mn/Zn atomic ratio, with the maximum being observed for Mn/Zn1⁄4 1:20. A 10–20 nm amorphous carbon shell is ev...

Catastrophic optical mirror damage (COMD) is one of the main failure mechanisms limiting reliability GaAs based laser diodes. Here, we compare facet stability ZnSe-passivated ridge-waveguide lasers (RWLs) that are cleaved in air and subsequently cleaned using atomic hydrogen with RWLs ultra-high vacuum. vacuum show a superior performance reach power densities up to 58 MW/cm2 under extended cont...

We report detailed studies of the photoluminescence ~PL! properties of CdSe quantum dots ~QDs! grown on ZnSe and Zn0.97Be0.03Se by molecular-beam epitaxy. We performed steady-state and time-resolved PL measurements and observed that nonradiative processes dominate at room temperature ~RT! in the CdSe/Zn0.97Be0.03Se QD structures while these nonradiative processes do not dominate in the CdSe/ZnS...

The electrogenerated chemiluminescence (ECL) spectrum of CdSe/ZnSe nanocrystals (NCs) dispersed in a CH2Cl2 solution containing 0.1 M TBAP was obtained by stepping the potential between +2.3 and −2.3 V. Unlike the spectra from the ECL of Si or CdSe NCs, where the emission occurs in a single peak that is significantly red-shifted from the photoluminescence (PL) peak (attributed to emission from ...