A theranostic nanomedicine (CD-Oxa) is synthesized by means of the condensation reaction between amino groups on surface fluorescent carbon dots (CDs) and carboxyl group oxaliplatin derivative Oxa(IV)-COOH. CD-Oxa, which integrates optical properties CDs anticancer function oxaliplatin, could be used for simultaneous drug delivery tracking. As a service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may re-organized...

A new type of carbon dots (CD-Asp) with targeting function toward brain cancer glioma was synthesized via a straightforward pyrolysis route by using D-glucose and L-aspartic acid as starting materials. The as-prepared CD-Asp exhibits not only excellent biocompatibility tunable full-color emission, but also significant capability C6 cells without the aid any extra molecules. In vivo fluorescence images showed high-contrast biodistribution 15 min after tail vein injection. much stronger...

A two-dimensional cationic covalent organic framework membrane with extraordinary separation properties and high permeability.

Despite rapid developments of light-emitting diodes (LEDs) based on emerging perovskite nanocrystals (PeNCs), it remains challenging to achieve devices with integrated high efficiencies and brightness because the insulating long-chain ligands used for PeNCs. Herein, we develop highly luminescent stable formamidinium lead bromide PeNCs capped rationally designed short aromatic 2-naphthalenesulfonic acid (NSA) LEDs. Compared commonly oleic ligands, NSA molecules not only preserve surface...

Defects (Ti3+ or oxygen vacancies) have been demonstrated to promote the charge separation process in TiO2 based photocatalysts. Particularly, bulk defects within a certain concentration can give great enhancement for both light absorption and efficiency. In this report, we explored one-step molten salts route synthesize SrTiO3 nanocubes with doped) by using SrCO3 as Sr source, Ti powder sources. The amount of be tuned changing molar ratio Ti/TiO2. corresponding bandgap changed from 3.29...

Abstract Wide‐bandgap perovskite solar cells, which are essential for tandem photovoltaics, easily suffer from open‐circuit voltage ( V OC ) losses due to challenges in suppressing halogen heterogeneity and defect‐related nonradiative recombination the active layers. Herein, a multifunctional fluorine‐containing additive of 8‐pentafluorobenzyloxy quinoline (8‐PFBQ) is explored modulate crystallization defect properties wide‐bandgap (1.67 eV) perovskites, enhancing both efficiency operational...

Eu3+ and Sm3+ codoped micro/nanosized MMoO4 (M = Ca, Ba, Sr) phosphors with various shapes have been synthesized via a facile hydrothermal method surfactant-free environment. The morphology of the materials was found to be manipulated by pH value precursor solution. MMoO4:Eu3+, nanoflakes, microflowers, cubes, spheres were obtained characterized X-ray diffraction field emission scanning electron microscopy. luminescent properties molybdate systematically studied. introduction into each...

A high efficiency quantum dot sensitized solar cell (QDSC) based on Ag nanoparticles (NPs) decorated TiO2/ZnO nanorod arrays (NAs) photoelectrode has been constructed. The incorporation of NPs to NAs not only increases light harvesting and facilitates exciton dissociation but also decreases surface charge recombination prolongs electron lifetime, which collectively contribute improving the Jsc CdS/CdSe QDs cosensitized cells. direct contact with TiO2 is undergoing Fermi level alignment;...

Abstract Formamidinium lead bromide (FAPbBr 3 ) nanocrystals (NCs) demonstrate great potential in light‐emitting diode (LED) applications due to their pure green emission and excellent stability. However, the abundant defects at surface of NCs act as charge trapping centers significantly increase trap‐assisted nonradiative recombination channels, hampering performance improvement LEDs based on FAPbBr NCs. Herein, a facile self‐passivation strategy is developed by introducing excess...

The controlled synthesis of anatase titanium dioxide (TiO2) with both high surface area and energy facets is technologically important for its application in photocatalysis, photoelectrochemical cells, solar cells. Here we report a simple fluorine free hydrothermal method to synthesize hierarchically nanostructured mesoporous TiO2 spheres (MATS), which were covered {001} facets. Mild H2SO4 was used as phase-inducer the formation phase capping agent promote oriented growth Detailed XRD SEM...

The red emission through upconversion (UC) upon 980 nm excitation based on Er3+/Yb3+ combination is very attractive for bioimaging applications. intensity of the observed to be strongly dependent host materials. However, origin behavior and quantitative dependence remain unclear. Here, effectiveness second step UC from Er3+ intermediate state 4I13/2 4F9/2 level by energy transfer Yb3+ studied three popular hosts (β-NaYF4, Ba5Gd8Zn4O21, Y2O3) that have different phonon energies. Their...

Blue-emitting phosphors for near ultraviolet (NUV) based tri-color RGB phosphor blend converted white light emitting diodes (LEDs) have been extensively investigated in the past few years. LED chip peaked 400 nm is most efficient among NUV chips currently. However, of blue show inefficient excitation around nm. Herein, a novel SrLu2O4:Ce3+ matching well with and showing high thermal stability has developed. The photoluminescence spectrum presents broad emission band peaking at 460 bandwidth...

QDSCs based on bandgap-tunable alloyed CdS_0.12Se_0.88 QDs with ZnSe/ZnS passivation were synthesized by a SILAR process high PCE of 6.14%.

ZnS as an inorganic passivation agent has been proven to be effective in suppressing charge recombination and enhancing power conversion efficiency (PCE) quantum dot-sensitized solar cells (QDSCs). In the present study, we constructed a novel TiO2/ZnS/CdS/ZnCdS/CdSe/ZnS photoelectrode via successive ionic layer adsorption reaction (SILAR) chemical bath deposition (CBD). The complementary effects of multi-ZnS layers on optical electrochemical performance QDSCs were systematically...

Cesium lead halide perovskite nanocrystals show promising potential in optical and photonic applications, whereas it is challenging to improve the stability of due their highly ionic nature inconsistency crystal lattice.

In photon-conversion processes, rapid cooling of photo-induced hot carriers is a dominant energy loss channel. We herein report 3-fold reduced carrier rate in CsPbBr3 nanocrystals capped with cross-linked polysiloxane shell comparison to single alkyl-chain oleylamine ligands. Relaxation charge depends on the carrier-phonon coupling (CPC) process as an important channel dissipate energies nanostructured perovskite materials. The CPC strengths two samples were measured through cryogenic...

In this work, a mixing-calcination method was developed to facilely construct MXene/CuO nanocomposite. CuO and MXene were first dispersed in ethanol with sufficient mixing. After solvent evaporation, the dried mixture calcinated under argon produce As characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), photoelectron spectra (XPS), nanoparticles (60–100 nm) uniformly distributed on surface edge of nanosheets. Furthermore, as evaluated differential...

An inorganic−organic hybrid semiconductor, ZnS/CHA (CHA = cyclohexylamine) nanocomposites was successfully synthesized via a solvothermal method using CHA as solvent, which yielded uniform and ultralong nanowires with widths of 100−1000 nm lengths 5−20 μm. Changing the reaction conditions could alter morphology optical properties nanocomposites. The periodic layer subnanometer structures were identified by high-resolution transmission electron microscopy (HR-TEM) images, thickness ∼2 nm....

The introduction of various amounts reduced graphene oxide (RGO) to CdS/CdSe quantum dots co-sensitized solar cells was investigated enhance the light absorption and promote electron transfer. characterization comparison optical electrochemical properties as well performance resultant dot-sensitized (QDSCs) with different RGO have been systematically. demonstrated harvesting consequently increase short-circuit current density (Jsc). ZnS inserting between QDs can effectively block charge...

We report photoluminescence (PL) of indium phosphide (InP) surface passivated by sulfur (S). A three-fold enhancement band edge emission from the bulk InP was observed after ammonium sulfide ((NH4)2S) solution for 10 min. X-ray photoelectron spectroscopy measurements indicate that oxide at is removed being sulfurized in (NH4)2S solution. However, significantly decreases a longer treatment time, which maybe due to thick S layer deposited resulting low light transmission.