Applied Materials Today
·
2019
·
IF 8.013
Quan Xu,Wenjing Yang,Yangyang Wen,Shengkun Liu,Zheng Liu,Wee-Jun Ong,Neng Li
Multiple-color emissive MXene quantum dots (MQDs) exhibit vast application prospects in various fields, including optoelectronics, bioimaging, and catalysis. However, the majority of the recent MQDs display limited maximum emission in the blue-light region. Herein, we employ the hydrogen bonds as an adjustment method to prepare novel full-color MQDs using Ti 3 C 2 MXene as the starting material. By doping with sodium thiosulfate and ammonia water (sulfur-doped, nitrogen-doped), the maximum emission of the obtained MQDs demonstrates entire light spectrum covering from blue to orange light. Interestingly, the as-synthesized Ti 3 C 2 MQDs aqueous solutions unveil multiple-color, excitation-independent emission wavelength and fluorescence (lifetime and quantum yield) enhancement compared with in the dry state. The fluorescence shift and enhancement are confirmed by comprehensive spectroscopic techniques (e.g. grazing incidence X-ray diffraction (GIXRD)) and complementary density functional theory (DFT) calculations. The results indicate that the construction of stalwart bridge-like hydrogen-bonded networks between the MQDs by highly ordered bound water on the doped MQDs surface can give rise to the immobilization of the C O and C–O bonds of the MQDs, thus strengthening the rigidity of the entire system. As a benefit of the bandgap emission, white light-emitting diodes (WLEDs) with stable emission color by directly utilizing MQDs as an active emission layer have been realized for the first time. As such, the as-prepared full-color MQDs developed herein can remarkably broaden the prospect of MXene 2D quantum dots (2D-QDs) in a myriad of technological applications such as electronics, batteries, bioimaging, and cancer therapy.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Junjie Wang,Danyang Li,Lan Mu,Miaozi Li,Yu Luo,Binbin Zhang,Chaohuang Mai,Biao Guo,Linfeng Lan,Jian Wang,Hin-Lap Yip,Junbiao Peng
Full-color matrix devices based on perovskite light-emitting diodes (PeLEDs) formed via inkjet printing are increasingly attractive due to their tunable emission, high color purity, and low cost. A key challenge for realizing PeLED matrix devices is achieving high-quality perovskite films with a favorable emission structure via inkjet printing techniques. In this work, a narrow phase distribution, high-quality quasi-two-dimensional (quasi-2D) perovskite film without a “coffee ring” was obtained via the introduction of a phenylbutylammonium cation into the perovskite and the use of a vacuum-assisted quick-drying process. Relatively efficient emissions of red, green, and blue (RGB) uniform quasi-2D perovskite films with high photoluminescence quantum yields were cast by the inkjet printing technique. The RGB monochrome perovskite matrix devices with 120 pixel-per-inch resolution exhibited electroluminescence, with maximum external quantum efficiencies of 3.5, 3.4, and 1.0% (for red, green, and blue light emissions, respectively). Furthermore, a full-color perovskite matrix device with a color gamut of 102% (NTSC 1931) was realized. To the best of our knowledge, this is the first report of a full-color perovskite matrix device formed by inkjet printing.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 41
·14548-14558
·
IF 7.059
Zhihao Wang,Qinghong Meng,Chunyun Wang,Dianyuan Fan,Yu Wang
Phosphor-converted white light-emitting diodes (pc-WLEDs) integrated with deep UV chips and single-component white light-emitting phosphors have attracted widespread research interest recently. (Y,Tb,Eu)NbO4 nanophosphors with full-color emission properties were achieved in this work by a facile calcination-assisted hydrothermal method, and the elaborately designed white light-emitting (Y0.988Tb0.010Eu0.002)NbO4 phosphor was successfully applied to a 275 nm chip excited pc-WLED with a relatively low correlated color temperature (CCT) of 5517 K and a high color-rendering index (CRI) of 86.7. Through a comprehensive characterization by XRD, elemental analysis, FE-SEM, TEM, TG, FT-IR, UV-vis, and optical spectroscopy, the YNbO4 nanophosphor with optimal PL properties was evidenced to be obtainable through calcining the hydrothermally crystallized precursor at 1000 °C. The quenching concentrations of Tb3+ and Eu3+ in YNbO4 were determined to be ∼4 and 5 at%, respectively, and the efficiency of the NbO43− → Tb3+ energy transfer was calculated to be ∼47.93%. Upon excitation at 260 nm, the ternary (Y,Tb,Eu)NbO4 phosphor simultaneously displays blue NbO43−, green Tb3+, and red Eu3+ emissions. Benefiting from the NbO43− → Tb3+ → Eu3+ energy transfer, full color emission was achieved via adjusting the Tb3+ and Eu3+ concentrations in (Y,Tb,Eu)NbO4. The white light-emitting (Y0.988Tb0.010Eu0.002)NbO4 phosphor with color coordinates of (0.336, 0.334) can maintain its emission color and ∼67% of its overall emission intensity at 150 °C, indicating that the phosphor is highly promising for application in deep UV chip-based pc-WLEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xuanying Chen,Jiacheng Chen,Guangchen Sun,Lifang Guo,Jianhua Su,Zhiyun Zhang
Herein, a molecular pixel system for full-color luminescence reproduction is achieved by adjusting the colorless mixtures of two matching fluorophores, i.e., polarity-insensitive 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine (DPAC) as the fixed red primary color and polarity-sensitive dansylamide (DSA) as dynamic blue to green primary colors. DPAC and DSA possess independent emission properties free from electron and energy transfer crosstalk between them because of their close frontier molecular orbitals as well as similar absorptions below 400 nm. According to the additive color theory, under diverse mixing ratios and various polarities, a smooth emission color change is realized in the triangle surrounded by the luminophores in the chromaticity diagram with accurate prediction and expedient reproduction. The principle of this system may open an innovative route for the development of powerful full-color luminescent materials, for example, ratiometric fluorescent polarity sensors and invisible fluorescent crayons.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2009
·Vol. 19
·期 33
·5952-5955
·
IF 4.646
Yijie Lu,Hongwei Xia,Guangzhao Zhang,Chi Wu
Electrically tunable full color display photonic crystals (PCs) made of a thin film of block copolymer, polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP), have been developed. The phase separation of PS and P2VP blocks leads to a one-dimensional periodic lamellar structure parallel to the surface of the thin film. In a solvent mixture of water and ethanol, each P2VP layer is swollen and partially charged. Applying a low voltage (<2.5 V) to such a thin film can lead to the repeatable expansion or contraction of each P2VP layer, depending on the direction and strength of the electrical potential. Such a variation of the lamellar periodicity leads to a full color display over a wide range from ultraviolet to near infrared. The advantages of such PCs are their facile preparation, low driving voltage and good durability, which make them potentially useful in information technologies.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Yamei Ding,Ping He,Shaohan Li,Bo Chang,Shengli Zhang,Zhehan Wang,Jiayi Chen,Jin Yu,Sanxie Wu,Haibo Zeng,Li Tao
Hexagonal boron nitride quantum dot (BNQD) has aroused great interest in the optoelectronics field due to their metal-free nature with promising optical properties. However, it has been a great challenge to modulate its photoluminescence to the long-wavelength region so far. Herein, BNQDs with full-color emission (420–610 nm) have been implemented by doping diverse amino ligands in different solvents for the first attempt. This color variation from blue, green, yellow-green, yellow to red is ascribed to the surface states tunable via amination degree. Attractively, the quantum yield of our blue BNQDs has set a record at 32.27%, and rare yellow-green BNQDs have been demonstrated. Combining good thermal dissipation capability and high transparency, our full-color BNQD holds great potential for transparent flexible display and security labels at the elevated temperature.
研究领域:
光学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 4
·693
·
IF 5.719
Demin Huang,Haiyan Qi,Jing Jing,Rokayya Sami,Tao Jing,Sultan J. Alsufyani,Nada Benajiba,Nawal Madkhali
Nitrogen-doped carbon dots exhibiting excitation-dependent full-color emissions (F-NCDs) were prepared via the one-step hydrothermal method with citric acid and phenylenediamine. Specifically, the emission wavelength of the F-NCDs tuned from 452 nm to 602 nm due to the introduction of new energy levels by C=O and C=N functional groups. We exploited its stability in illumination, ionic strength, and pH, as well as its specificity, sensitivity, especially in ascorbic acid (AA) detection. F-NCDs could measure the AA concentration in the linear ranges of 0~0.1 and 0.1~1 mmol/L with the detection limit (LOD, S/N = 3) as low as 2.6 nmol/L. Additionally, we successfully detected AA in bovine serum with our F-NCDs and obtained the result within 1 min. Because of full-color emission features, we believe our F-NCDs have a great potential in fluorescent sensor detection.
研究领域:
分析化学
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生物传感
·
材料科学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 21
·2100814
·
IF 9.926
Kaimin Du,Manli Zhang,Yao Li,Huwei Li,Kai Liu,Chengyu Li,Jing Feng,Hongjie Zhang
Advanced fluorescent anticounterfeiting technology has attracted widespread attention and encourages people to develop reliable luminescent materials with multiple colors and tunable luminescence. Here, novel nanocomposites composed of perovskite quantum dots (PeQDs) and upconversion nanoparticles (UCNPs) are successfully designed and served as efficient anticounterfeiting inks. NaYF 4 :Yb/Tm@NaYF 4 :Yb core–shell UCNPs are formed first and then ultrasmall CsPbX 3 (X = Cl, Br, and I or mixed halide systems Cl/Br and Br/I) PeQDs linked on the surface of UCNPs by seeded-growth strategy. UCNPs-CsPbX 3 nanocomposites can not only provide multicolor downconversion luminescence (DCL) under ultraviolet (UV) excitation, but also produce tunable upconversion luminescence (UCL) under 980 nm continuous-wave laser excitation. Finally, UCX 3 nanocomposites are mixed with prepolystyrene (PS) and the resulting UCX 3 /PS with excellent water stability and photostability can be employed as multicolor fluorescent ink for both writing and printing. These findings not only present a general method to fabricate novel nanocomposites combining both advantages of UCNPs and PeQDs, but also provide insight for the practical application in the field of anticounterfeiting.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Peiyu Tan,Dengfeng Ren,Yuge Han
Intercalation-based organic polymers that shift their colors during ion insertion and extraction provide a significant basis for existing electrochromic technology. Nevertheless, the complexity of modifying the structure in the skeleton or combining several diverse polymers to produce a full-color range has restricted the practical applications of electrochromic materials. Herein, we demonstrate two configurations of the poly(3,4-ethylenedioxythiophene) (PEDOT) Fabry–Perot (F–P) nanocavity-type electrochromic devices fabricated by spray coating lossless PEDOT on the F–P metasurfaces (Cr/ITO/Ag/Cr), which allows full-color response by simply controlling the thickness of dielectric layer indium tin oxide (ITO). However, the reflected light from the PEDOT F–P nanocavity-type electrode can be modulated by electrically controllable optical absorption of PEDOT. Besides, the subtle brightness regulation could be obtained in our F–P nanocavity electrochromic devices via altering the PEDOT thickness. Overall, our results offer a novel perspective for versatile color control of PEDOT.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
DOI
高影响因子
Science Advances
·
2022
·Vol. 8
·期 8
·
IF 14.957
Dan Li,Jie Yang,Manman Fang,Ben Zhong Tang,Zhen Li
Achieving stimulus-responsive ultralong room temperature phosphorescence (RTP) in organic materials especially with full-color tunable emissions is attractive and important but rarely reported. Here, a strategy was reported to realize stimulus-responsive RTP effect with color-tunable emissions by using water as solvent in the preparation process without any organic solvent through covalent linkage of arylboronic acids with different π conjugations and polymer matrix of polyvinyl alcohol. The yielded polymer films exhibit outstanding RTP performance (2.43 s). Furthermore, an excitation-dependent RTP film was obtained, and the afterglow color changes from blue to green, then to red as the excitation wavelength increases. The RTP property of all the above materials is sensitive to water and heat stimuli, because the rigidity of the system could be broken by water. Last, they were successfully applied in a multilevel information encryption and multicolor paper and ink.
研究领域:
材料科学
·
光学材料
·
高分子科学
·
刺激响应材料
·
磷光
·
信息安全
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Mu Bin,Hao Xiangnan,Luo Xiao,Yang Zhongke,Lu Huanjun,Tian Wei
Light-harvesting is an indispensable process in photosynthesis, and researchers have been exploring various structural scaffolds to create artificial light-harvesting systems. However, achieving high donor/acceptor ratios for efficient energy transfer remains a challenge as excitons need to travel longer diffusion lengths within the donor matrix to reach the acceptor. Here, we report a polymeric supramolecular column-based light-harvesting platform inspired by the natural light-harvesting of purple photosynthetic bacteria to address this issue. The supramolecular column is designed as a discotic columnar liquid crystalline polymer and acts as the donor, with the acceptor intercalated within it. The modular columnar design enables an ultrahigh donor/acceptor ratio of 20000:1 and an antenna effect exceeding 100. Moreover, the spatial confinement within the supramolecular columns facilitates control over the energy transfer process, enabling dynamic full-color tunable emission for information encryption applications with spatiotemporal regulation security.
研究领域:
材料科学
·
光化学
·
纳米技术
·
光电
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Po Hu,Shuai Zhou,Yang Wang,Jianhua Xu,Sa Zhang,Jiajun Fu
The luminescent self-healing materials have a significant prospect in optical device applications such as biosensing, multicolor displays, and high-level anti-counterfeiting. Herein, a novel printable, room-temperature self-healing and full-color-tunable luminescent composites were developed through the noncovalent binding of physically cross-linked p(HFBM- co -SBMA)/EMITFSI and excitation-orthogonalized RGB-switchable UCNPs. According to a strategy of Selective photon capture (SPC), the RGB-switchable core-sextuple-shell UCNPs were first established for red/green/blue-switchable luminescence under three different excitations (980/808/1550 nm) and even full-color output through the combination of 980/808/1550 nm light. The copolymer p(HFBM- co -SBMA), pre-synthesized via free radical polymerization, was incorporated with ionic liquid EMITFSI to formulate room-temperature self-healing material owing to ion–dipole interactions between EMITFSI and p(HFBM- co -SBMA). Afterward, the integration of 30 wt% EMITFSI copolymer and fluothane-modified UCNPs resulted in the formation of the final full-color-tunable luminescent self-healing composites, which not only exhibited superior Young’s modulus and healing efficiency than some previously reported room-temperature self-healing materials, but also realized full-color-tunable emissions under ternary 980/808/1550 nm excitations. Significantly, the luminescent self-healing composites, which also exhibited colorless character and high transmittance, could be employed as printable inks for making various luminescent patterns (including clock, flower, and QR code) on flexible substrates via convenient and cost-effective screen-printing technique. As the results of proofs of concept, these luminescent patterns displayed fantastic viewing capability and highly secured property, which showed enormous potential of the proposed luminescent self-healing composites in flexible panchromatic display and high-security-level anti-counterfeiting. To our knowledge, this work provides the strategy for constructing full-color-tunable self-healing luminescent composites for the first time. Undoubtedly, the well-designed luminescent self-healing materials will provide new insights and guidance for exploiting the new generation of flexible optical devices, especially multicolor displays and anti-counterfeiting devices.
研究领域:
材料科学
·
光学
·
纳米技术
·
显示技术
·
防伪技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）