Carbon dots (CDs) have been studied for years as one of the most promising fluorescent nanomaterials. However, CDs with red or solid-state fluorescence are rarely reported. Herein, through a one-pot solvothermal treatment, hydrophobic (H-CDs) blue dispersed emission and aggregation-induced obtained. When water is introduced, interaction leads to aggregation H-CDs. The formation H-CD clusters induces turning off emission, carbonized cores suffer from π-π stacking interactions, on...

With superior photoluminescent properties, the recently discovered A2MF6:Mn4+ material holds potential in replacing commercial rare-earth-doped (oxy)nitride phosphors for solid state lighting and display. We report here a green synthetic route to synthesize narrow red emitting K2SiF6:Mn4+ without usage of toxic volatile HF solution. show that is produced common low-toxic H3PO4/KHF2 liquid instead high-toxic systematically investigate its morphology photoluminescence properties. Moreover,...

Carbon dots (CDs) have attracted attention in metal-free afterglow materials, but most CDs were heteroatom-containing and the emissions are still limited to short-wavelength region. A universal approach activate room-temperature phosphorescence (RTP) of both heteroatom-free was developed by one-step heat treatment boric acid (BA). The introduction an electron-withdrawing boron atom composites can greatly reduce energy gap between singlet triplet state; formed glassy state effectively protect...

Abstract Enhancing solar energy conversion is imperative and maximizing capture remains significant. Here, nanotechnology toward engineering hybrid photosystem involving biological photosynthetic chloroplasts dual‐emissive carbon dots (CDs) employed for improved photosynthesis by harnessing more effective light. Specifically, the as‐prepared CDs show strong absorption in ultraviolet (UV) light region exhibit intense blue red water, which exactly match spectrum of chloroplasts. After coating...

Superhigh brightness, reliability, and modularization are three key features of state-of-the-art high-brightness solid state lighting, such as high-power white light-emitting diodes (white LEDs) laser LDs). However, these inevitably limited by the organic resin packing material, a crucial component lighting device, because its unstable property at high temperature low thermal conductivity. Here, we report robust light convertor that can simultaneously play roles phosphor an alternative...

Thermal management is still a great challenge for high-power phosphor-converted white-light-emitting diodes (pc-WLEDs) intended future general lighting. In this paper, series of single-component white-emitting silicate SiO2-Li2O-SrO-Al2O3-K2O-P2O5: Ce(3+), Tb(3+), Mn(2+) (SLSAKP: Mn(2+)) glasses that simultaneously play key roles as luminescent convertor and an encapsulating material WLEDs were prepared via the conventional melt-quenching method, systematically studied using their absorption...

As one of the most promising fluorescent nanomaterials, fluorescence carbon dots (CDs) in solution is extensively studied. Nevertheless, synthesis multicolor solid-state (SSF) CDs rarely reported. Herein, with aggregation-induced emission are prepared using amine molecules, all them exhibiting dual at 480 nm (Em-1) and 580-620 (Em-2), which related to SS bonds dithiosalicylic acid conjugated structure attached CO/CN bonds, respectively. a strong electron-withdrawing group, increase CN...

The design of luminescent materials with widely and continuously tunable excitation emission is still a challenge in the field advanced optical applications. In this paper, we reported Eu(2+)-doped SiO2-Li2O-SrO-Al2O3-K2O-P2O5 (abbreviated as SLSAKP:Eu(2+)) silicate glass. Interestingly, it can give an intense from cyan (474 nm) to yellowish-green (538 simply by changing wavelength adjusting concentration Eu(2+) ions. absorption spectra, photoluminescence (PLE) (PL) decay curves reveal that...

Compared to fluorescence imaging with short-lived emissive probes, the use of phosphorescent probes conveys advantage long signal persistance in time and this permits one discriminate against interference from autofluorescence. However, realization room temperature phosphorescence (RTP) that feature ultralong emission lifetimes aqueous solution is still a challenge. Here, we present rational strategy for realizing RTP air-saturated media carbon dot-based silica composites (CDs@SiO2) which as...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRobust and Stable Narrow-Band Green Emitter: An Option for Advanced Wide-Color-Gamut Backlight DisplayXuejie Zhang†⊥, Hung-Chia Wang†⊥, An-Cih Tang†, Shin-Ying Lin†, Hung-Chun Tong‡, Ching-Yi Chen‡, Yu-Chun Lee‡, Tzong-Liang Tsai‡, Ru-Shi Liu*†§View Author Information† Department of Chemistry, National Taiwan University, Taipei 106, Taiwan‡ Lextar Electronic Corporation, Hsinchu 300, Taiwan§ Mechanical Engineering Graduate Institute...

Abstract Room‐temperature afterglow (RTA) materials with long lifetime have shown tremendous application prospects in many fields. However, there is no general design strategy to construct near‐infrared (NIR)‐excited multicolor RTA materials. Herein, we report a universal approach based on the efficient radiative energy transfer that supports reabsorption from upconversion (UMs) carbon dots‐based (CDAMs). Thus, emission (blue, cyan, green, and orange) of various CDAMs can be activated by UMs...

Abstract Carbon dots (CDs) have excellent properties and made great progress in synthesis applications. However, it is still a challenge to realize convenient preparation highly emissive solid‐state luminescence without the assistance of matrix. In this study, high‐efficiency hydrophilic yellow CDs (Y‐CDs) with aggregation‐induced emission (AIE) characteristics are synthesized by one‐pot microwave method. Y‐CDs show weak photoluminescence quantum yield (PLQY) 6.14% aqueous solutions, but...

Carbon dots (CDs) have aroused widespread interest in the construction of room-temperature phosphorescent (RTP) materials. However, it is a great challenge to obtain simultaneous multicolor long-wavelength RTP emission and excellent stability CD-based Herein, novel universal "CDs-in-YOHF" strategy proposed generate by confining various CDs Y(OH)xF3–x (YOHF) matrix. The mechanism triplet related space confinement, formation hydrogen bonds C–F bonds, electron-withdrawing fluorine atoms....

The effect of water-soluble fullerene C70(C(COOH)2)4−8 on plant growth was investigated, using the transgenic seedling lines expressing fluorescent makers. retarded roots with shortened length and loss root gravitropism were observed for seedlings grown in fullerene-containing medium. Fluorescence imaging revealed abnormalities tips hormone distribution, cell division, microtubule organization, mitochondrial activity. study inhibitory effects at cellular level provides new information...

Red phosphors (e.g., SrLiAl3N4:Eu2+) with high thermal stability and narrow-band properties are urgently explored to meet the next-generation high-power white light-emitting diodes (LEDs). However, date, synthesis of such remains an arduous task. Herein, we report, for first time, a facile method synthesize SrLiAl3N4:Eu2+ through Sr3N2, Li3N, Al, EuN under atmospheric pressure. The as-synthesized red-emitting phosphor exhibits excellent stability, including small chromaticity shift low...

Sunlight utilization by plants via the photosynthesis process is limited to visible spectral range. How expand range construction of a hybrid photosynthetic system hot topic in this field. In work, far-red carbon dots (FR-CDs) with excellent water solubility, good biocompatibility, high quantum yield (QY), and superior stability were prepared one-step microwave synthesis 3 min. The as-prepared FR-CDs an efficient converter transferring ultraviolet A (UV-A) light 625–800 nm emission, which...

Recently, bulk nanobubbles have attracted intensive attention due to the unique physicochemical properties and important potential applications in various fields. In this study, periodic pressure change was introduced generate nanobubbles. N2 with bimodal distribution excellent stabilization were fabricated nitrogen-saturated water solution. O2 CO2 also been created using method both good stability. The influence of action time on generated size studied. It interestingly found that, formed...