A one-step microwave synthesis of N-doped hydroxyl-functionalized carbon dots (CDs) with ultra-high fluorescence quantum yields (QYs) 99% is reported. These QY CDs were synthesized using citric acid and amino compound-containing hydroxyls like ethanolamine tris(hydroxylmethyl)aminomethane. Amino carboxyl moieties can form amides through dehydration condensation reactions, these act as bridges between hydroxyl groups, modify groups on the surface CDs. The entire reaction be carried out within...

In this work, the optical properties of carbon nanoparticles (CNPs) can be modulated by dopant‐N atom and sp 2 C‐contents. CNPs prepared with low urea mass ratio 0.2:1 (CNP1) exhibit blue emission (maximum PL quantum yield: 15%). Increasing C‐ contents, as determined in high 2:1 (CNP2), lead to green yield up 36% ethanol aqueous solution). Amplified spontaneous (ASE) observed only CNP2 solution. Green lasing is achieved from solution a linear long Fabry‐Perot cavity, indicating potential...

High-efficiency blue CdSe/ZnS quantum dots (QDs) have been synthesized for display application with emission peak over 460 nm the purpose of reducing harmful effect short-wavelength light to human eyes. To reach a better charge balance, different size ZnO nanoparticles (NPs) were and electrical properties NPs analyzed. Quantum dot light-emitting diodes (QLEDs) based on as-prepared QDs optimized successfully fabricated. Using small-size NPs, we obtained maximum current efficiency (CE) 14.1 cd...

A series of donor-acceptor (D-A) co-oligomers with oligo(fluorene-alt-bithiophene) and perylene diimide as donor acceptor segments, respectively, have been designed synthesized. They can self-assembly into alternating D-A lamellar nanostructured films the periods depending on molecular length. These successfully used in fabrication high-performance single-molecular solar cells power conversion efficiency up to 1.50%.

Efficient inorganic perovskite light-emitting diodes (PeLEDs) with an ultrathin emission layer (∼30 nm) were realized by doping Lewis base polyethylene glycol (PEG) into CsPbBr3 films. PEG in the films not only physically fills crystal boundaries but also interacts crystals to passivate grains, reduce nonradiative recombination, and ensure efficient luminance high efficiency. As a result, promoted brightness, current efficiency (CE), external quantum (EQE) achieved. The decay rate of...

Wiry solar cells: A solution-phase synthetic approach gave monocrystalline SnSe nanowires with a mean diameter of approximately 20.8 nm and lattice distance 0.575 (see HRTEM image). Hybrid cells based on blend these poly(3-hexylthiophene) (P3HT) were fabricated. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by the authors. Please note: The publisher is...

Methylammonium (MA) lead halide (MAPbX3, X = Cl, Br, I) perovskite quantum dots (PQDs) are very sensitive to environment (moisture, oxygen, and temperature), suffering from poor stability. To improve the stability, we synthesized silica-coated PQDs (SPQDs) by an improved ligand-assisted reprecipitation method through simply mixing stirring under room temperature in air without adding water catalyst, whole process took only a few seconds. The photoluminescence (PL) spectra of SPQDs can be...

Transparent electrodes with a dielectric–metal–dielectric (DMD) structure can be implemented in simple manufacturing process and have good optical electrical properties. In this study, nickel oxide (NiO) is introduced into the DMD as more appropriate dielectric material that has high conduction band for electron blocking low valence efficient hole transport. The indium-free NiO/Ag/NiO (NAN) transparent electrode exhibits an adjustable transmittance of ∼82% combined sheet resistance ∼7.6...

Electrochromic (EC) technology can adjust optical properties under electrical stimulation with broad applications in smart windows, displays, and camouflage. However, significant challenges remain developing inorganic EC films high durability, rapid response, mechanical flexibility due to intrinsic brittleness dense microstructure. Herein, a nanostructured quasiplanar heterointerface (Q-PHI) is first introduced into the electrode/EC interlayer realize robust, ultrafast switching tungsten...

Abstract Transparent electrodes are essential components for optoelectronic devices, such as touch panels, organic light-emitting diodes and solar cells. Indium tin oxide (ITO) is widely used transparent electrode in devices. ITO has high transparency low resistance but contains expensive rare elements ITO-based devices have poor mechanical flexibility. Therefore, alternative with excellent opto-electrical performance flexibility will be greatly demanded. Here, organics introduced into...

Abstract A CsPbBr 3 ‐based all‐inorganic perovskite light‐emitting diode (PeLED) with ultrahigh brightness and enhanced stability is prepared by controlling of morphology interface engineering. nonionic surfactant polyoxyethylene (20) sorbitan monolaurate introduced into the film, which induces tightly arranged grains in thus highly passivating defects at grain boundaries, resulting a performance‐enhanced PeLED highest 111 000 cd m −2 , peak current efficiency (CE) 21.1 −1 maximum external...

The low resistance and high D OH − result from oxide particles present on the surface within inner parts of octahedron. This allows electrolyte ions to diffuse more efficiently ensures a much effective area for participating in reaction.

Aluminum (Al) has been an attractive anode candidate for lithium-ion batteries (LIBs) since the 1970s. While formation of β-LiAl is considered origin Li storage capability in Al anodes, multiple Li-Al phases are known to exist which have even greater lithium content, and most enriched phase offers twice theoretical specific capacity (ca. 2,000 mAh g−1-Al). These Li-rich often neglected field electrochemical energy they generally believed be only approachable at elevated temperatures. Here,...

Abstract The electroresponsive WO 3 ‐based electrochromic distributed Bragg reflectors (ECDBRs) are fabricated by means of one‐step, room temperature glancing‐angle electron‐beam evaporation. reflectance and wavelength ECDBRs can be precisely reversibly tailored on a large scale simply applying small bias voltage (±1.1 V) due to the effect layer, this unique character is utilized construct an electrically tunable microcavity luminescent device with embedded green CdSe@ZnS quantum dots (QDs)....

The utilization of triplet excitons plays a key role in obtaining high emission efficiency for organic electroluminescent devices. However, to date, only phosphorescent materials have been implemented harvest the light-emitting field effect transistors (OLEFETs). In this work, we report first incorporation exciplex thermally activated delayed fluorescence (TADF) emitters heterostructured OLEFETs excitons. By developing new kind TADF emitter constituted by m-MTDATA...

Continuous-wave (CW) lasing in quasi-two-dimensional (2D) perovskite-based distributed feedback cavities has been achieved at room temperature; however, CW microcavity lasers comprising Bragg reflectors (DBRs) have rarely prepared using solution-processed quasi-2D perovskite films because the roughness of significantly increases intersurface scattering loss microcavity. Herein, high-quality spin-coated gain were an antisolvent to reduce roughness. The highly reflective top DBR mirrors...

Abstract A novel UV transparent conducting films based on Sb 2 O 3 /Ag/Sb (SAS) structure, which were prepared by an electron-beam thermal evaporation at room temperature. This SAS exhibits excellent electrical, optical and stable properties. Especially for region, the has high transmittance of 80% 306 nm 92% 335 nm, meanwhile achieving low sheet resistance ( ≤ 10 Ω sq −1 ). The OLED show competitive device performance. obtains peak electroluminescence 376 shows a very maximum EQE 4.1% with...

Ultraviolet organic light-emitting devices (UVOLEDs) may combine the tunability properties of materials through modifying molecular structure and advantages such as large-area, low-cost, facile to realize high-performance UV sources. In state-of-the-art UVOLEDs, external quantum efficiencies (EQE) are more than 3%, but only a few have achieved pure emission could not compromise durability irradiance at same time. Portable compact sources with narrow band made significant achievements in...

Efficient inorganic perovskite light-emitting devices (PeLEDs) with a vacuum-deposited CsPbBr3 emission layer were realized by introducing an ultrathin 2-phenylethanamine bromide interlayer. The PEA+ cations not only passivated the nonradiative defects terminating on surface but also regulated charge transport to balance hole and electron transport. Consequently, PeLEDs exhibit significantly promoted performance turn-on voltage of 3 V, maximum current efficiency 14.64 cd A-1, external...