Two novel evaporation- and solution-process-feasible thermally activated delayed fluorescence emitters, green-light-emission ACRDSO2 yellow-light-emission PXZDSO2, based on a brand-new electron-acceptor moiety thianthrene-9,9',10,10'-tetraoxide, are developed for organic light-emitting diodes. The solution-processed devices, without any hole-transport layer, exhibit competitive performance reduced efficiency roll-off compared with corresponding vacuum-deposited devices.

Two thioxanthone‐derived isomeric series of thermally activated delayed fluorescence (TADF) emitters 1,6‐2TPA‐TX/3,6‐2TPA‐TX and 1,6‐2TPA‐TXO/3,6‐2TPA‐TXO are developed for organic light‐emitting diodes (OLEDs). Blue emission devices based on symmetrical 3,6‐2TPA‐TX with common vertical transition route realize an extremely high external quantum efficiency (EQE) 23.7%, ever highest EQE 24.3% is achieved yellow 3,6‐2TPA‐TXO by solely changing the sulfur atom valence state thioxanthone core....

Although the organic light-emitting devices (OLEDs) encompassing TVs, smartphones, and wearable devices, etc. already have been commercialized, there is still room to pursue material improvements in efficiency cost-effectiveness. Organic materials experienced development of three generation system, it timely summary recent advances remaining challenges as well their corresponding devices. Special attention mainly concentrated on describing blue structures related electroluminescence (EL)...

A series of blue emitters incorporating spiro[fluorene-9,9′-thioxanthene] or spiro[fluorene-9,9′-thioxanthene-S,S-dioxide] as the core and phenylcarbazole triphenylamine arms were designed synthesized. Their spiro conformation is beneficial for their thermal stability reducing trend aggregation quenching. By tuning valence sulfur atom, highly efficient local excited (LE) state deep charge-transfer (CT) are obtained. The devices based on LE TPA-S CzB-S nondoped emissive layer exhibit high...

Thioxanthone derivatives consisting of undecorated carbazole as an electron donor and thioxanthone (TXO) or 9H-thioxanthen-9-one-S,S-dioxide (SOXO) acceptor in a donor-acceptor (D-A) donor-acceptor-donor (D-A-D) structure were developed thermally activated delayed fluorescence emitters to fabricate highly efficient fluorescent organic light emitting diodes. Their emission color was successfully tuned from blue yellow by changing the sulfur atom valence state unit tune intramolecular charge...

A series of polarity-tunable host materials were developed based on oligocarbazoles and diphenylphosphine oxide, their polarities can be tuned through increasing distance acceptor donor units. Density functional theory calculations employed, photoluminescence spectra in different polar solvents measured to illustrate these materials. As CZPO has relatively stronger polarity, electroluminescence (EL) spectrum solution-processed device 6 wt % PXZDSO2:CZPO is 7 nm red-shifted relative that...

Deep blue fluorophors incorporating sulfone-locked triphenylamine were developed for hybrid white OLEDs.

We introduce a versatile recognition tunneling technique using doubly cucurbit[7]uril-functionalized electrodes to form supramolecular junctions that capture analytes dynamically by host-guest complexation. This results in characteristic changes their single-molecule conductance. For structurally related drug molecules (camptothecin, sanguinarine, chelerythrine, and berberine) mixtures thereof, we observed distinct current switching signals intrinsic conductance properties as well...

Bamboo is a kind of renewable natural polymer resource. Using bamboo biomass without component isolation process can be sustainable route for the preparation an eco-friendly film. Inspired by structure plant biomass, we designed to introduce bionic interaction, being akin role hemicellulose in connecting cellulose and lignin components using tannic acid-modified nanocrystals (TA@CNCs) as bridging molecules. In order make up size difference between cellulosic molecules particles, (CNCs)...

Excited-state intramolecular Proton Transfer (ESIPT) molecules have been drawing considerable attention due to their unique photophysical properties and potential applications in optoelectronic devices. Although ground excited-state tautomerism various proton transfer systems associated with ESIPT has extensively studied both experimentally theoretically, the charge-transport characteristics of at single-molecule level little investigated. In this work, scanning tunneling microscope-based...

Improving the techniques for single-molecule conductance measurements is important progress of molecular electronics. In this report, a novel technique, which named molecular-junction mapping (MJM) demonstrated to be able simultaneously measure electronic single molecules and their corresponding conformations in an electrode gap. Measured conductances few model yield much narrower distribution as compared with results obtained using conventional break-junction indicating that better defined...

Two indacenodithiophene (IDT) core-based small molecules with different side chains of bulky 4-hexylphenyl and flexible n-dodecyl the same number carbon atom, namely SM1 SM2, respectively, were designed synthesized as donor materials in organic solar cells (OSCs). The impacts combined IDT core on optical absorption, electrochemical property, hole mobility, film morphology, cell performance studied thoroughly. two compounds possess a broad absorption covering wavelength range 450–700 nm...

Deep blue non-doped multilayer OLEDs with EQEs exceeding 5.10% and single layer devices excluding any carrier transporting materials an EQE of 4.22% were obtained at extremely high luminance 10 000 cd m⁻².

Recognition tunneling (RT) is an emerging technique for investigating single molecules in a tunnel junction. We have previously demonstrated its capability of molecule detection and identification, as well probing the dynamics intermolecular bonding at level. Here by introducing cucurbituril new class recognition molecule, we demonstrate powerful platform electronically host-guest chemistry In this report, first investigated electrical properties Then studied two model guest molecules,...

High photostable epoxy polymerized carbon quantum dots (C-dots) luminescent thin films were prepared and their performances compared with the CdTe (QDs). First, water soluble C-dots (λem = 543.60 nm) synthesized. Poly (ethylene glycol) diglycidyl ether (PEG) diaminooctane used as polymer matrix to make resin films. FT-IR spectra showed that there vibration at 3448 cm−1 1644 which contributed -OH -NH respectively. SEM observations polymerizations of uniform no structure defects. Mechanical...

Molecular dynamics (MD) simulations have been applied to investigate 1, 1-diamino-2, 2-dinitroethene (FOX-7) crystal and FOX-7 (011)-based polymer-bonded explosives (PBXs) with four typical polymers, polyethylene glycol (PEG), fluorine-polymer (F 2603 ), ethylene-vinyl acetate copolymer (EVA) ester urethane (ESTANE5703) under COMPASS force field. Binding energy ( E bind cohesive density (CED), initiation bond length distribution, RDG analysis isotropic mechanical properties of its PBXs at...

Seawater electrolysis is an ideal technology for obtaining clean energy—green hydrogen. Developing efficient bifunctional catalysts crucial hydrogen production through direct seawater electrolysis. Currently, metal substrates loaded with active are widely employed as electrodes However, the challenge of corrosion cannot be ignored. In this work, boron-doped diamond (BDD) excellent resistance was explored a substrate loading in A step-by-step electrodeposition method used to fabricate...

Although attaching methylthio (-SMe) to the ortha-position of thiophene/furan produce a new linker motif has been employed for extending variety molecular conductance measurements, atomic-scale details of...

Quinoxaline (Qx) terminated with two mercaptomethyl (-SMe) anchoring ligands demonstrated conductance values when studied using the scanning tunneling microscope-based break-junction (STM-BJ) technique. Further research showed that observed low and high conductances (termed GL GH) resulted from electron transfer pathways of different lengths distinct molecular binding configurations. arises terminal -SMe groups attached to Au electrodes, GH appears one Au-S linkages is replaced by an Au-N...