Novel quantum-dot light-emitting diodes based on all-inorganic perovskite CsPbX3 (X = Cl, Br, I) nanocrystals are reported. The well-dispersed, single-crystal quantum dots (QDs) exhibit high yields, and tunable light emission wavelength. demonstration of these novel QDs opens a new avenue toward designing optoelectronic devices, such as displays, photodetectors, solar cells, lasers. As service to our authors readers, this journal provides supporting information supplied by the authors. Such...

Recently, Kovalenko and co‐workers Li developed CsPbX 3 (X = Cl, Br, I) inorganic perovskite quantum dots (IPQDs), which exhibited ultrahigh photoluminescence (PL) yields (QYs), low‐threshold lasing, multicolor electroluminescence. However, the usual synthesis needs high temperature, inert gas protection, localized injection operation, are severely against applications. Moreover, so unexpectedly QYs very confusing. Here, for first time, IPQDs' room‐temperature (RT) synthesis, superior PL,...

All-inorganic colloidal cesium lead halide perovskite quantum dots (CsPbX3, X = Cl, Br, I) are revealed to be a new class of favorable optical-gain materials, which show ­combined merits both and perovskites. Low-threshold ­ultrastable stimulated emission is ­demonstrated under atmospheric conditions with wavelength tunability across the whole ­visible spectrum via either size or composition control. As service our authors readers, this journal provides supporting information supplied by...

Solution-processed CsPbBr3 quantum-dot light-emitting diodes with a 50-fold external quantum efficiency improvement (up to 6.27%) are achieved through balancing surface passivation and carrier injection via ligand density control (treating hexane/ethyl acetate mixed solvent), which induces the coexistence of high levels ink stability, photoluminescence yields, thin-film uniformity, carrier-injection efficiency.

Abstract Nowadays, low‐frequency electromagnetic interference (<2.0 GHz) remains a key core issue that plagues the effective attenuation performance of conventional absorption devices prepared via component‐morphology method (Strategy I). According to theoretical calculations, one fundamental solution is develop material possesses high ε′ but lower ε″. Thus, it attempted control dielectric values applying an external electrical field, which inducts changes in macrostructure toward...

All-inorganic cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) quantum dots (QDs), possessing high photoluminescence yields tunable color output, have recently been endowed great promise for high-performance solar cells light-emitting diodes (LEDs). Although moisture stability has greatly improved through separating QDs with a SiO2 shell, the practical applications of CsPbX3 are severely restricted by their poor thermal stability, which is associated intrinsically low formation...

Printed flexible photodetectors based on 2D inorganic perovskites with atomic thickness show excellent photosensing fast rise and decay response times. As-synthesized nanosheets can easily be dispersed in various solvents, leading to large-area, crack-free, low-roughness, films after printing. This study demonstrates that all-inorganic perovskite CsPbX3 as a new class of semiconductors have huge potential for optoelectronic applications.

Developing low-cost and high-quality quantum dots (QDs) or nanocrystals (NCs) their corresponding efficient light-emitting diodes (LEDs) is crucial for the next-generation ultra-high-definition flexible displays. Here, there a report on room-temperature triple-ligand surface engineering strategy to play synergistic role of short ligands tetraoctylammonium bromide (TOAB), didodecyldimethylammonium (DDAB), octanoic acid (OTAc) toward "ideal" perovskite QDs with high photoluminescence yield...

Inorganic perovskite CsPbBr3 nanocrystals (NCs) are emerging, highly attractive light emitters with high color purity and good thermal stability for light-emitting diodes (LEDs). Their photo/electroluminescence efficiencies very important fabricating efficient LEDs. Here, we propose a novel strategy to enhance the efficiency of NCs through doping heterovalent Ce3+ ions via facile hot-injection method. The cation was chosen as dopant by virtue its similar ion radius formation higher energy...

Perovskite quantum dots (QDs) with high photoluminescence yields (PLQYs) and narrow emission peak hold promise for next-generation flexible high-definition displays. However, perovskite QD films often suffer from low PLQYs due to the dynamic characteristics between QD's surface organic ligands inefficient electrical transportation resulting long hydrocarbon as highly insulating barrier, which impair ensuing device performance. Here, a general organic-inorganic hybrid ligand (OIHL) strategy...

All‐inorganic perovskites have high carrier mobility, long diffusion length, excellent visible light absorption, and well overlapping with localized surface plasmon resonance (LSPR) of noble metal nanocrystals (NCs). The high‐performance photodetectors can be constructed by means the intrinsic outstanding photoelectric properties, especially plasma coupling. Here, for first time, inorganic perovskite are demonstrated synergetic effect preferred‐orientation film plasmonic both performance...

The strong ionic character endows all‐inorganic CsPbX 3 (X = Cl, Br, I) perovskite nanocrystals (NCs) with different chemical features from classical Cd‐based NCs, especially when considering their interaction polar solvents and surfactants. This has aroused intensive interest, but is still short of comprehensive understanding. More significantly, above characteristic may be used to improve the quality thin films, which crucial for carrier transport inside optoelectronic devices. Here, an...

Abstract Perovskite quantum-dot-based light-emitting diodes (QLEDs) possess the features of wide gamut and real color expression, which have been considered as candidates for high-quality lightings displays. However, massive defects are prone to be reproduced during quantum dot (QD) film assembly, would sorely affect carrier injection, transportation recombination, finally degrade QLED performances. Here, we propose a bilateral passivation strategy through passivating both top bottom...

Visible‐infrared dual‐modal light harvesting is crucial for various optoelectronic devices, particularly solar cells and photodetectors. For the first time, this study reports on large 25 cm 3 ‐volume all‐inorganic perovskite CsPbBr single crystal (SC) with an emphasis observed visible‐infrared sensing as demonstrated by high‐performance First, ultralarge SC ingots trapping state density low of 1 × 10 9 −3 have been achieved a modified Bridgman growth method. The volume reported here largest...

Low cost and high conductivity make copper (Cu) nanowire (NW) electrodes an attractive material to construct flexible stretchable electronic skins, displays, organic light-emitting diodes (OLEDs), solar cells, electrochromic windows. However, the vulnerabilities that Cu NW have oxidation, bending, stretching still present great challenges. This work demonstrates a new Cu@Cu4Ni conductive elastomer composite with ultrahigh stability for first time. NWs, facilely synthesized through one-pot...

Novel fluorescence with highly covert and reliable features is quite desirable to combat the sophisticated counterfeiters. Herein, we report a simultaneously triple-modal fluorescent characteristic of CsPbBr3@Cs4PbBr6/SiO2 by excitation thermal, ultraviolet (UV) infrared (IR) light for first time, which can be applied multiple modal anti-counterfeiting codes. The diphasic structure CsPbBr3@Cs4PbBr6 nanocrystals (NCs) was synthesized via typical reprecipitation method followed uniformly...

Abstract The broadband light‐absorption ability of carbon dots (CDs) has inspired their application in photocatalysis, however this been impeded by poor electron transfer inside the CDs. Herein, we report preparation Cu–N‐doped CDs (Cu‐CDs) and investigate both doping‐promoted performance photooxidation reactions. Cu–N doping was achieved through a one‐step pyrolytic synthesis with Na 2 [Cu(EDTA)] as precursor. As confirmed ESR, FTIR, X‐ray photoelectron spectroscopies, Cu species chelates...

Image sensor arrays are widely used in digital cameras, smartphones, and biorobots. However, most commercial image rely on the dichroic prisms or a set of interference filters to distinguish characteristic color spectrum, which significantly increases cost fabrication processing complexity. In this work, an ultranarrow response photodetector with full-width at half-maximum being ∼12 nm specific detectivity over 1011 Jones 545 successfully achieved CsPbBr3 polycrystalline films using...

Abstract Lead halide perovskite, as an emerging semiconductor, provides a fire‐new opportunity for high‐definition display and solid‐state lighting. Earthshaking improvements are implemented in green, red, near‐infrared perovskite light‐emitting diodes (PeLEDs). However, blue PeLEDs still far behind performance, which restricts the development of practical applications. Herein, facile energy cascade channel strategy via one‐step self‐organized controllable 2D/3D preparation by introducing...

Abstract Perovskite quantum dot‐based light‐emitting diodes (QLEDs) have been considered a promising display technology due to their wide color gamut for authentic expression. Currently, the external efficiency (EQE) state‐of‐the‐art blue perovskite QLEDs is about 15%, which still lags behind its green and red counterparts (>25%) film‐based LEDs. Here, that achieve an EQE of 23.5% at 490 nm presented, best knowledge, highest value reported among perovskite‐based LED fields. This...