A novel sequential layer-by-layer sub-100 °C vacuum-sublimation method to fabricate planar-type organometal halide perovskite solar cells is developed. Very uniform and highly crystalline thin films with 100% surface coverage are produced. The attain maximum average efficiencies up 15.4% 14%, respectively. This low- temperature, all-vacuum process suitable for a wide variety of rigid flexible applications. As service our authors readers, this journal provides supporting information supplied...

Blue electrophosphorescence in organic light-emitting diodes (OLEDs) is enhanced by the use of 3,6-bis(triphenylsilyl)carbazole (see figure). This carbazole derivative with sterically bulky and large-gap triphenylsilyl groups an electrochemically morphologically stable efficient host material for blue electrophosphorescence. When utilized OLEDs, high efficiencies up to 16 %, 30.6 cd A–1, 26.7 lm W–1 are achieved.

Simultaneous enhancement of out-coupling efficiency, internal quantum and color purity in thermally activated delayed fluorescence (TADF) emitters is highly desired for the practical application these materials. We designed synthesized two isomeric TADF emitters, 2DPyM-mDTC 3DPyM-pDTC, based on di(pyridinyl)methanone (DPyM) cores as new electron-accepting units di(tert-butyl)carbazole (DTC) electron-donating units. which structurally nearly planar with a very small ΔEST, shows higher purity,...

Two benzoylpyridine-carbazole based fluorescence materials DCBPy and DTCBPy, bearing two carbazolyl 4-(t-butyl)carbazolyl groups, respectively, at the meta ortho carbons of benzoyl ring, were synthesized. These molecules show very small ΔEST 0.03 0.04 eV transient PL characteristics indicating that they are thermally activated delayed (TADF) materials. In addition, extremely different photoluminescent quantum yields in solution solid state: cyclohexane value 14 36%, but thin films, increase...

Vacuum-sublimed inorganic cesium lead halide perovskite thin films are prepared and integrated in all-vacuum-deposited solar cells. Special care is taken to determine the stoichiometric balance of sublimation precursors, which has great influence on device performance. The mixed devices exhibit exceptional stabilized power conversion efficiency (11.8%) promising thermal long-term stabilities. As a service our authors readers, this journal provides supporting information supplied by authors....

Three new tailor-made molecules (DPDCTB, DPDCPB, and DTDCPB) were strategically designed convergently synthesized as donor materials for small-molecule organic solar cells. These compounds possess a donor-acceptor-acceptor molecular architecture, in which various electron-donating moieties are connected to an electron-withdrawing dicyanovinylene moiety through another electron-accepting 2,1,3-benzothiadiazole block. The structures crystal packings of DTDCPB the previously reported DTDCTB...

The optical constants of a CH₃NH₃PbI_3−xCl_xperovskite thin film were acquired for the first time.

A novel donor-acceptor-acceptor (D-A-A) donor molecule, DTDCTB, in which an electron-donating ditolylaminothienyl moiety and electron-withdrawing dicyanovinylene are bridged by another electron-accepting 2,1,3-benzothiadiazole block, has been synthesized characterized. vacuum-deposited organic solar cell employing DTDCTB combined with the electron acceptor C(70) achieved a record-high power conversion efficiency (PCE) of 5.81%. The respectable PCE is attributed to spectral response extending...

The use of photovoltaic cells with an organometallic perovskite as the active layer for indoor dim‐light energy harvesting is evaluated. By designing electron‐transporting materials and fabrication processes, traps in layers carrier dynamics can be controlled, efficient devices are demonstrated. best‐performing small‐area photovoltaics exhibit a promising high power conversion efficiency up to ≈27.4%, no hysteresis behavior, exceptionally low maximum point voltage variation ≈0.1 V under...

Abstract Despite the swift development in perovskite solar cells (PSCs), suppressing ion defects bulk and further extending long‐lasting stability of remain concerned issues that are yet to be solved. Here, a symmetrical organic acceptor−donor−acceptor (A−D−A) molecule with core architecture indaceno[1,2‐b:5,6‐b']dithiophene (IDT) bilateral arms oxindole, named IDT‐OD, as versatile defect passivation agent, is adopted inactivate nonradiative recombination sites absorber. The S element IDT...

Two new organic dyes adopting coplanar diphenyl-substituted dithienosilole as the central linkage have been synthesized, characterized, and used sensitizers for dye-sensitized solar cells (DSSCs). The best DSSC exhibited a high power conversion efficiency up to 7.6% (TP6CADTS) under AM 1.5G irradiation, reaching ∼96% of ruthenium dye N719-based reference cell same conditions.

All-vacuum-deposited perovskite solar cells produced by controlling reagent partial pressure in high vacuum with newly developed multi-layer electron and hole transporting structures show outstanding power conversion efficiency of 17.6% smooth, pinhole-free, micrometer-sized crystal grains.

A D-A-A-type molecular donor (DTDCTP) featuring electron-accepting pyrimidine and dicyanovinylene blocks has been synthesized for vacuum-deposited planar-mixed heterojunction solar cells with C(70) as the acceptor, giving a power conversion efficiency high 6.4%.

Abstract With the rapid development of artificial intelligence, simulation human brain for neuromorphic computing has demonstrated unprecedented progress. Photonic synapses are strongly desirable owing to their higher neuron selectivity, lower crosstalk, wavelength multiplexing capabilities, and low operating power compared electric counterparts. This study demonstrates a highly transparent flexible synapse with two‐terminal architecture that emulates photonic synaptic functionalities....

Four 2-(styryl)triphenylene derivatives (TSs) were synthesized for deep-blue dopant materials. By using a pyrene-containing compound, DMPPP, as the host, TS-doped devices exhibited significant delayed fluorescence via triplet-triplet annihilation, providing highest quantum efficiency of 10.2% and current 12.3 cd A(-1).

Abstract In this study, a novel perovskite quantum dot (QD) spray‐synthesis method is developed by combining traditional QD synthesis with the technique of spray pyrolysis. By utilizing new technique, cubic‐shaped QDs homogeneous size 14 nm demonstrated, which shows an unprecedented stable absolute photoluminescence yield ≈100% in solution and even solid‐state neat film. The highly emissive thin films are integrated light emission devices (LEDs) organic displays (OLEDs). color conversion...

In this work microcavity-capped colour-tuneable SMOSCs are evaluated. By adopting a microcavity-structured cathode with optical spacer layers of different thicknesses fabricated in Ag/NPB/Ag structure, the transmission spectra complete devices can be tuned over entire visible-light region (400–750 nm). The semitransparent solar cells show an average efficiency 4.78% under 1-sun illumination.

We have successfully synthesized a series of blue thermally activated delayed fluorescence emitters, BPy-pC, BPy-pTC, BPy-p2C, and BPy-p3C, bearing 4-benzoylpyridine core as the electron-accepting unit carbazolyl, tert-butylcarbazolyl, dicarbazolyl, tercarbazolyl groups electron-donating units, respectively. The density functional theory calculation shows that all compounds their lowest unoccupied molecular orbitals on benzoylpyridine moiety. However, highest occupied orbital (HOMO) BPy-p3C...

Sodium-ion batteries (NIBs) are considered as promising alternatives to lithium-ion (LIBs) especially in large-scale energy storage systems of renewable owing their potentially low production cost. In view the larger ionic size Na ions than Li ions, commercial graphite anode LIBs is not suitable for NIBs. To achieve NIBs with a high density, various materials have been studied recent years. Among these, two-dimensional (2D) attracted considerable attention on account unique 2D-layered...

Lead halide perovskite materials have recently received considerable attention for achieving an economic and tunable laser owing to their solution-processable feature promising optical properties. However, most reported perovskite-based lasers operate with a large lasing-mode volume, resulting in high lasing threshold due the inefficient coupling between gain medium cavity. Here, we demonstrate continuous-wave nanolasing from single lead (CsPbBr3) quantum dot (PQD) plasmonic gap-mode...

Recently, conductive-bridging memristors based on metal halides, such as halide perovskites, have been demonstrated promising components for brain-inspired hardware-based neuromorphic computing. However, realizing devices that simultaneously fulfill all of the key merits (low operating voltage, high dynamic range, multilevel nonvolatile storage capability, and good endurance) remains a great challenge. Herein, we describe lead-free cesium incorporating MoOX interfacial layer type memristor....

Facilely synthesized nanoradiosensitizers with well-controlled structure and multifunctionality are greatly desired to address the challenges of cancer radiotherapy. In this work, a universal method is developed for synthesizing chalcogen-based TeSe nano-heterojunctions (NHJs) rod-, spindle-, or dumbbell-like morphologies by engineering surfactant added selenite. Interestingly, dumbbell-shaped NHJs (TeSe NDs) as chaperone exhibit better radio-sensitizing activities than other two...