Human eyes undertake the majority of information assimilation for learning and memory. Transduction color intensity incident light into neural signals is main process visual perception. Besides light-sensitive elements that function as rods cones, artificial retinal systems require neuromorphic devices to transform stimuli post-synaptic signals. In terms plasticity timescale, synapses with short-term (STP) long-term potentiation (LTP) represent foundation experience acquisition memory...

Human eyes use retina photoreceptor cells to absorb and distinguish photons from different wavelengths construct an image. Mimicry of such a process extension its spectral response into the near-infrared (NIR) is indispensable for night surveillance, retinal prosthetics, medical imaging applications. Currently, NIR organic photosensors demand optical filters reduce visible interference, thus making filter-free anti-visible challenging task. To solve this limitation, conformal,...

Abstract Herein, the design and synthesis of novel π‐extended quinoline‐flanked diketopyrrolopyrrole (DPP) [abbreviated as QDPP] motifs corresponding copolymers named PQDPP‐T PQDPP‐2FT for high performing n‐type organic field‐effect transistors (OFETs) in flexible thin film devices are reported. Serving DPP‐flankers backbones, quinoline is found to effectively tune copolymer optoelectric properties. Compared with TDPP pyridine‐flanked DPP (PyDPP) analogs, widened bandgaps strengthened...

Abstract High mobility ambipolar conjugated polymers are seriously absent regardless their great potential for flexible and printed plastic devices circuits. Here, with ultrahigh balanced hole electron developed via a two‐step CH activation strategy. Diketopyrrolopyrrole‐benzothiadiazole‐diketopyrrolopyrrole (DBD) its copolymers thiophene/selenophene units (short as PDBD‐T PDBD‐Se) used examples. PDBD‐Se exhibits highly efficient transport up to 8.90 7.71 cm 2 V −1 s in organic field‐effect...

Aromatic diimides are one of the most important chromophores in construction n-type organic semiconductors, which lag far behind their p-type counterpart but necessary for ambipolar transistors, p-n junctions and complementary circuits. Herein, we establish a facile one-pot domino synthetic protocol aromatic via palladium-catalyzed carbonylation tetrabromo precursors. Taking tetrabromocorannulene (TBrCor) tetrabromo-2,7-di-tert-butylpyrene (TBrPy) as typical examples, obtained diimide...

Give me a ring? An efficient approach has been developed for the intramolecular decarboxylative coupling of arene carboxylic acids/esters with aryl bromides catalyzed by palladium (see scheme). From synthetic viewpoint, this method is highly attractive because catalyst loading low, optimized reaction conditions are mild, and substrate scope broad. Detailed facts importance to specialist readers published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...

Organic electronics based on poly(vinylidenefluoride/trifluoroethylene) (P(VDF‐TrFE)) dielectric is facing great challenges in flexible circuits. As one indispensable part of integrated circuits, there an urgent demand for low‐cost and easy‐fabrication nonvolatile memory devices. A breakthrough made a novel ferroelectric random access cell (1T1T FeRAM cell) consisting selection transistor order to overcome the half‐selection problem. Unlike complicated manufacturing using multiple...

Two new asymmetric DPP polymers were designed and synthesized, which gave excellent ambipolar transporting properties for OFETs PSCs.

Abstract MXenes are highly conductive layered materials that attracting a great interest for high‐performance opto‐electronics, photonics, and energy applications.. Their non‐covalent functionalization with ad hoc molecules enables the production of stable inks 2D flakes to be processed in thin‐films. Here, formation dispersions via intercalation Ti 3 C 2 T x didecyldimethyl ammonium bromide (DDAB) yielding –DDAB, is demonstrated. Such modulates properties , as evidenced by 0.47 eV decrease...

Abstract Mesopolymers with high solubility, free of structural defects, and negligible batch‐to‐batch variation open a new avenue for organic optoelectronics. Organic light emitting transistors that combine the functions light‐emitting diodes field‐effect transistors. However, charge transport ability strength are contradictory within one conjugated polymer. Herein, three low‐molecular‐weight mesopolymers thienopyrroledione–benzothiadiazole repeating units (meso‐TBTF) were obtained. The show...

Abstract High ambipolar mobility emissive conjugated polymers (HAME‐CPs) are perfect candidates for organic optoelectronic devices, such as polymer light emitting transistors. However, due to intrinsic trade‐off relationship between high and strong solid‐state luminescence, the development of HAME‐CPs suffers from structural synthetic complexity. Herein, a universal design principle simple approach developed. A series non‐fused composed charge transfer units, π bridges units synthesized via...

Two polymer donors PPAF and PPAT with phenylacetates as pendant side chains were designed synthesized. The pendants of are furan thiophene, respectively. Relative to the sulfur in thiophene pendants, oxygen can induce more intermolecular interactions. Thus, neat films, shows ordered packing than PPAT; but blended over-interaction between BTP-eC9 acceptor mutually disturbs their packing, resulting reduced crystallinity thereby hindering device performance. power conversion efficiencies...

Organic spintronic devices present one of the most appealing technologies for future by taking advantage spin degree freedom. Conjugated polymers are attractive exemplified device organic valves (OSVs) due to their weak spin-orbit coupling, solution-processability, low production cost, and mechanical flexibility. However, performance polymer SVs is a matter debate, as evaporated top ferromagnetic (FM) electrode will penetrate into layer during typical fabrication process, especially in with...

Three novel asymmetric flanking diketopyrrolopyrrole based polymers with different π bridges were applied to organic solar cells as a donor or an acceptor, respectively.

Organic thermoelectric materials have attracted tremendous attention by virtue of their heat harvest capability, solution processability, and mechanical flexibility. Moreover, molecular engineering allows a facile convenient tuning thermal...

A new asymmetric furan and thieno[3,2-b]thiophene flanked diketopyrrolopyrrole (TTFDPP) building block for conjugated polymers is designed used to generate a donor-acceptor semiconducting polymer, poly[3-(furan-2-yl)-2,5-bis(2-octyldodecyl)-6-(thieno[3,2-b]thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-alt-thieno[3,2-b]thiophene] (abbreviated PTTFDPP-TT), consisting of TTFDPP unit copolymerized with comonomer (TT), which further synthesized. Results demonstrate that PTTFDPP-TT-based...

DPEA shows good charge carrier mobility and AIE efficient luminescence.

Neuromorphic engineering and artificial intelligence demands hardware elements that emulates synapse algorithms. During the last decade electrolyte-gated organic conjugated materials have been explored as a platform for synapses neuromorphic computing. Unlike biological synapses, in current devices synaptic facilitation depression are triggered by voltages with opposite polarity. To enhance reliability simplify operation of without lowering its sophisticated functionality, here, an...

Two cocrystals based on IFB and DPDA are controllably prepared under solvent effects demonstrating different photo-physical properties.

The ruthenium-catalyzed 1,6-enyne cyclization in the presence of bulky substituted terminal alkyne proceeds smoothly at room temperature to afford highly five-membered cyclic compounds featuring a 1,5-enyne motif. Deuterium-labeling experiments showed that key ruthenacyclopentene intermediate undergoes cleavage metal-carbon bonds through metal-assisted σ-bond metathesis reaction, thus leading formation C(sp(2))-H and C(sp(3))-C(sp) bonds.

Abstract Aza(oxa)bicyclo[3.2.0]heptenes are accessed through the PtCl 2 ‐catalyzed cycloisomerizations of heteroatom‐tethered 1,6‐enynes featuring a terminal alkyne and amide as solvent. It is shown that weak coordinating properties solvent alkyl substituent(s) at propargylic carbon atom favor formation cyclobutenes instead other possible cycloisomerization products such 1,3‐diene derivatives or cyclopropane‐fused heterocycles.

Thermoelectric materials allow for direct conversion between heat and electricity, realizing a facile effective utilization of waste thermal management. Semiconductive organic small molecules (OSMs) have attracted ever-increasing attention in thermoelectric device fabrication due to their simplicity synthesis, well-defined molecular structure, low toxicity, conductivity (κ ). As unique one-dimensional (1D) carbon allotrope, single-walled nanotubes (SWCNTs) excellent structural electrical...

Human eyes use retina photoreceptor cells to absorb and distinguish photons from different wavelengths construct an image. To emulate this process extend its spectral response into NIR region, Yunlong Guo, Wenping Hu, Yunqi Liu co-workers demonstrate a retina-like organic photosensor with wavelength-distinguishing memory functionality, in article number 1701772. Featuring integration of photosensing elements floating-gate modules, the device transduces nonvolatile green light photoswitch. In...