Efficient solid-state emitters developed by a new approach are described. While emission from triphenylamine (TPA) and its dimer (DTPA) is weakened aggregation, attaching tetraphenylethene (TPE) units to the amines boosts their efficiencies up 100% in aggregate state without harming hole-transport properties. The resultant 3TPETPA 4TPEDTPA luminogens show excellent electroluminescence performance. Detailed facts of importance specialist readers published as "Supporting Information". Such...

Emissive electron donor–acceptor (D–A) conjugates have a wide variety of applications in biophotonics, two-photon absorption materials, organic lasers, long wavelength emitters, and so forth. However, it is still challenge to synthesize high solid-state efficiency D–A structured emitters due the notorious aggregation-caused quenching (ACQ) effect. Though some systems are reported show aggregation-induced emission (AIE) behaviors, most only selectively AIE-active highly polar solvents,...

Turning "stone" into "gold": pyrene, a faint fluorophore in the solid state, is transformed bright emitter by decorating it with tetraphenylethene units; new luminogen thermally and morphologically stable its light-emitting diode shows excellent performance, external quantum efficiency current up to 4.95% 12.3 cd A(-1), respectively.

Two is better than one: a luminogen comprised of two units tetraphenylethene (BTPE) emits more efficiently that with one unit in the solid state; self-assembly BTPE molecules affords crystalline microfibers fluoresce 100% efficiency, giving largest effect aggregation-induced emission (alpha(AIE)-->infinity); BTPE-based electroluminescence devices emit current efficiency up to approximately 7.3 cd/A.

To improve the quality and durability of inorganic halide perovskite nanocrystals (NCs), ammonium lead oxide (PbO) were separately employed for synthesis NCs with a tunable ratio metal to halide. The halide-rich circumstance was therefore successfully set up found be beneficial obtaining good high photoluminescence quantum yields remarkable stability against purification compared those qualities previous regular methods fabricated light-emitting diode (LED) devices made in demonstrated...

Organic–inorganic hybrid perovskite materials with mixed cations have demonstrated tremendous advances in photovoltaics recently, by showing a significant enhancement of power conversion efficiency and improved stability. Inspired this development, study presents the facile synthesis mixed‐cation nanocrystals based on FA (1− x ) Cs PbBr 3 (FA = CH(NH 2 ). By detailed characterization their morphological, optical, physicochemical properties, it is found that emission property perovskite, ,...

Highly efficient tandem quantum-dot light-emitting diodes (QLEDs) are developed by using an interconnecting layer (ICL) with the structure of ZnMgO/Al/HATCN/MoO3. The ICL exhibits high transparency, charge generation/injection capability, and robustness to resist solvent damage during deposition upper functional layers. With proposed ICL, full color (red/green/blue, R/G/B) QLEDs demonstrated extremely current efficiency external quantum (EQE): 17.9 cd/A 21.4% for B-QLEDs, 121.5 27.6%...

The blue light emitting compound, BPPI, based on a phenanthro[9,10-d]imidazole group, is prepared by facial synthetic process and exhibits excellent thermal stability, highly efficient fluorescence balanced carrier injection. double-layered device BPPI shows higher maximum luminance lower turn-on voltage than the multi-layered one with an independent electron injection layer. results suggest that phenanthroimidazole unit building block for tuning properties as well emission.

We report a dual-mode organic photodetector (OPD) that has trilayer visible light absorber/optical spacer/near-infrared (NIR) absorber configuration. In the presence of NIR light, photocurrent is produced in light-absorbing layer due to trap-assisted charge injection at organic/cathode interface reverse bias. layer, enabled by anode/organic forward A high responsivity >10 A/W obtained both short and long wavelengths. The OPD exhibits an response operated bias bias, with specific detectivity...

Efficient inverted quantum-dot (QD) light-emitting diodes (LEDs) are demonstrated by using 15% Mg doped ZnO (Zn0.85Mg0.15O) as an interfacial modification layer. By doping into ZnO, the conduction band level, density of oxygen vacancies and conductivity can be tuned. To suppress excess electron injection, a 13 nm Zn0.85Mg0.15O interlayer with relatively higher edge lower is inserted between transport layer QD layer, which improves balance charge injection blocks non-radiative pathway....

Abstract Realizing of full-color quantum-dot LED display remains a challenge because the poor stability blue and immature inkjet-printing color patterning technology. Here, we develop multifunctional tandem by stacking yellow with organic using an indium–zinc oxide intermediate connecting electrode. Under parallel connection alternate-current driving, is full-color-tunable, which can emit red, green primary colors as well arbitrary that cover 63% National Television System Committee...

Pyrene-substituted ethenes, 1,2,2-tripheny-1-pyrenylethene (TPPyE) and 1,2-diphenyl-1,2-dipyrenylethene (DPDPyE), are synthesized characterized. Whereas they weakly emissive in solution become strong emitters when aggregated the condensed phase. In contrast to general observation that excimer formation quenches light emission of fluorophores, TPPyE DPDPyE exhibit efficient emissions solid state with high fluorescence quantum yields up 100%. The π–π intermolecular interactions between pyrene...

Abstract Benzene‐cored luminogens with multiple triarylvinyl units are designed and synthesized. These propeller‐shaped molecules nonemissive when dissolved in good solvents, but become highly emissive aggregated poor solvents or the solid state, showing novel phenomenon of aggregation‐induced emission. Restriction intramolecular motion is identified as main cause for this effect. Thanks to their high solid‐state fluorescence quantum yields (up unity) thermal morphological stabilities,...

Triphenylamine (TPA) is a well-known hole-transporting material but suffers aggregation-caused emission quenching in the solid state. Tetraphenylethene (TPE), on other hand, an archetypal luminogen that shows phenomenon of aggregation-induced (AIE). In this work, TPA attached to TPE core as peripheral group generate new AIE luminogens with enhanced property. The TPA-TPE adducts, named 1-[4′-(diphenylamino)biphenyl-4-yl]-1,2,2-triphenylethene (TPATPE) and...

Full color luminogens are constructed from tetraphenylethene, benzo-2,1,3-thiadiazole and thiophene building blocks. OLED fabricated using one of the exhibits orange-red electroluminescence with high luminance efficiencies 8330 cd m−2, 6.1 A−1 3.1%, respectively.

Abstract A novel yellowish‐green triplet emitter, bis(5‐(trifluoromethyl)‐2‐ p ‐tolylpyridine) (acetylacetonate)iridium(III) (1), was conveniently synthesized and used in the fabrication of both monochromatic white organic light‐emitting diodes (WOLEDs). At optimal doping concentration, devices based on 1 exhibit a high efficiency 63 cd −1 (16.3% 36.6 lm W ) at luminance 100 m −2 . By combining with phosphorescent sky‐blue bis(3,5‐difluoro‐2‐(2‐pyridyl)phenyl)‐(2‐carboxypyridyl)iridium(III)...

All inorganic CsPbBr3 perovskite quantum dots (QDs) are potential emitters for electroluminescent displays. We have developed a facile hot-injection method to partially replace the toxic Pb2+ with highly stable Sn4+ . Meanwhile, absolute photoluminescence yield of CsPb1-x Snx Br3 increased from 45 % 83 SnIV substitution. The transient absorption (TA) exciton dynamics in undoped and CsPb0.67 Sn0.33 QDs at various excitation fluences were determined by femtosecond absorption, time-resolved...

Quantum dot light‐emitting diodes (QLEDs) with tandem structure are promising candidates for future displays because of their advantages pure emission color, long lifetime, high brightness, and efficiency. To obtain efficient QLEDs, a solution‐processable interconnecting layer (ICL) based on poly(3, 4‐ethylenedioxythiophene)/polystyrene sulfonate/ZnMgO is developed. With the proposed ICL, all‐solution‐processed, inverted, QLEDs demonstrated current efficiency (CE) 57.06 cd A −1 external...

Cadmium-free thick-shelled InP/ZnSeS/ZnS quantum dot (QD) was synthesized using the heating-up approach. This dots used in inverted light emitting diode (QLED) devices. The brightness of QLED device can reach a over 10 000 cd m-2 , low turn-on voltage (2.2 V), and high power efficiency (4.32 lm W-1 ).

Quantum-dot light-emitting diodes (QLEDs) with high brightness have potential application in lighting and display. The is realized at current density (J). However, J, the efficiency drops significantly, thereby limiting achievable brightness. This notorious phenomenon has been known as roll-off, which likely caused by Auger- and/or thermal-induced emission quenching. In this work, we show that Joule heat generated during device operation significantly affects roll-off characteristics of...

Combination of an aggregation-induced emission (AIE) moiety and a dimesitylboron group yields new three-coordinate boron compound exhibiting synergistic effect: the resultant TPEDMesB shows AIE feature with solid-state efficiency up to unity good electron-transport property, thus remarkable electroluminescence (EL) performances.

Abstract The utilization of an inorganic hole‐transport layer (HTL) is one the most effective methods to improve stability and reduce cost perovskite solar cells (PSCs). However, achieving high‐quality HTL films, especially films in n‐i‐p structures, via solution processes remains a big challenge. Here, simple surface modification strategy for low‐cost stable cuprous oxide (Cu 2 O) quantum dots proposed, which utilizes silane coupling agent. modified Cu O can be directly deposited on film as...