Science Advances
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2025
·Vol. 11
·期 7
·
IF 12.5
Ligang Wang,Zher Ying Ooi,Feng-Yan Jia,Yuqi Sun,Yun Liu,Linjie Dai,Junzhi Ye,Jincan Zhang,Hio-Ieng Un,Yu-Hsien Chiang,Sanyang Han,Alessandro James Mirabelli,Miguel Anaya,Zhilong Zhang,Yang Lu,Chen Zou,Baodan Zhao,Dawei Di,Xiaodong Yang,Dengyang Guo,Yu Tan,Hao Dong,Shaocheng Liu,Tianjun Liu,Huanping Zhou,Samuel D. Stranks,Ling-Dong Sun,Chun-Hua Yan,Richard H. Friend
Colloidal quantum dots (QDs) have illuminated computer monitors and television screens due to their fascinating color-tunable properties depending on the size. Here, the electroluminescence (EL) wavelength of perovskite LEDs was tuned via the atomic layer number (ALN) of nanoplates (NPs) instead of the “size” in conventional QDs. We demonstrated efficient LEDs with controllably tailored emission from n = 3, 4, 5, and ≥7 ALN perovskite NPs with specific and discrete major peaks at 607, 638, 669, and 728 nanometers. These LEDs demonstrated peak external quantum efficiency (EQE) of 26.8% and high wavelength reproducibility with less than 1 to 2 nm difference between batches. High color stability without observable EL spectral change and operating stability with the best T50 of 267 minutes at 1.0 milliampere per square centimeter was also achieved. This work demonstrates a concept of tailoring specific ALN emission with fixed wavelengths, shedding light on efficient, emission-discrete, and color-stable LEDs for next-generation display.
研究领域:
材料科学
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光学工程
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2019
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IF 1.795
Yong-Hong Lin,Zhi-Hua Qiu,Shuai-Hua Wang,Xian-Hui Zhang,Shao-Fan Wu
The outstanding photovoltaic performance of perovskite nanocrystals is attracting more and more attention. However, how to obtain stable wavelength-tunable red light-emitting perovskite materials is an urgent problem to be solved for the photovoltaic application. This paper reports a kind of orange to red light-emitting rubidium‑cesium lead halide perovskite nanocrystals (Rb x Cs 1-x PbBrI 2 , x = 0 to x = 0.6). By adjusting the rubidium‑cesium ratios in the precursor solution, the peak wavelength can be tuned from 631 nm to 588 nm. The nanocrystals have narrow emission line-widths and bright photoluminescence . Furthermore, the polymer nanocrystals are prepared simply by mixing PMMA and perovskite nanocrystals solution in appropriate ratios, forming a series of stable orange to red emitting materials.
研究领域:
材料科学
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光伏技术
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光学
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产品关联
DOI
高影响因子
MATERIALS LETTERS
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2020
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IF 3.204
Zihao Wang,Zhiduo Liu,Bingli Gu,Bo Gao,Ting Wang,Xiaohu Zheng,Gang Wang,Qinglei Guo,Da Chen
As an important approach for tuning the emission wavelength of graphene quantum dots (GQDs), controllable doping has attracted a great deal of attentions. Here, we reported an ultraviolet light-driven doping approach for GQDs at room temperature. N-doped graphene quantum dots (N-GQDs) are obtained via the reaction in dimethylformamide under the ultraviolet radiation. The emission wavelength can be tuned from 566 to 463 nm by controlling the doping concentration. The quantum yield of N-GQDs is demonstrated to be much higher than that of most reported GQDs and increases with the increase of the doping concentration. Finally, the synthesized N-GQDs are explored for the application in fluorescence bio-imaging.
研究领域:
材料科学
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生物医学工程
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纳米技术
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DOI
高影响因子
Applied Materials Today
·
2023
·
IF 8.3
Zizhao Fu,Hanxu Lu,Hong Liu,Yifeng Xing,Zhiyan Piao,Hanqing Dai,Wanlu Zhang,Ruiqian Guo
Due to their unique optical properties, I-III-VI alloyed quantum dots (QDs) have attracted significant attention. By cationic alloying and composition adjusting, quaternary and quintuple alloyed QDs could be synthesized and the optical properties could be further investigated by adjusting the synthesis parameters. In this study, we synthesized CuZnGaSSe (CZGSSe) QDs using a one-pot method and the photoluminescence quantum yield (PL QY) could reach 72.2%. The effects of the capping ligands, the halogen ions in Zn precursors and the reaction temperatures were explored and the growth mechanism of the CZGSSe QDs was discussed. Finally, by adjusting the S/Se ratio and Cu/Ga ratio, the prepared QDs exhibited tunable emission wavelengths ranging from 469 nm to 599 nm. This study is of significance for researching the growth sequence and guiding the synthesis of efficient quintuple QDs.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2021
·
IF 9.811
Qinggang Zhang,Xiaochuan Sun,Weilin Zheng,Qun Wan,Mingming Liu,Xinrong Liao,Takeshi Hagio,Ryoichi Ichino,Long Kong,Huamiao Wang,Liang Li
For next-generation high-definition displays, the newly recommendation 2020 (Rec. 2020) standard calls for the emission wavelength of green emitters to be kept at 525–535 nm with narrow emission line width below 25 nm. All-inorganic lead halide perovskite CsPbBr3 nanocrystals (NCs) with sharp emission seem as the prefect one to match the call, however, it is a great challenge to tune their emission wavelength to the target window of 525–535 nm because of the intrinsic band gap of CsPbBr3. Herein, we report a facile strategy to prepare CsPbBr3 NCs with finely tunable emissions in the narrow range of 525–535 nm by establishing a CsPbBr3–Cs4PbBr6:Na Type II structure. The doping of the Na ions is the key factor to construct the Type II structure, which induces the formation of the Cs4PbBr6:Na phase and builds CsPbBr3–Cs4PbBr6:Na Type II structure, leading to the tunable emission wavelength of CsPbBr3 NCs. The as-synthesized CsPbBr3 NCs exhibit an ideal emission at 525–535 nm with a narrow emission line width of 23 nm and a high photoluminescence quantum yield (PLQY) of 85%. As a green downconverter, an ultrapure green backlight covers 97% of the Rec. 2020 standard in the CIE 1931 color space, representing the “greenest” backlight up to now.
研究领域:
材料科学
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显示技术
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纳米科技
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·1927
·
IF 3.2
Jinying Zhang,Yexiaotong Zhang,Zhongwei Gao,Jiaxing Yang,Xinye Wang
The realization of broad-wavelength tunability of the structural color in Double layered Cholesteric Liquid Crystal Elastomers (DCLCEs), along with good flexibility and processability, presents a significant challenge. This research introduces a facile and effective fabrication technique, Solvent Evaporation-Induced Self-Assembly (SEISA), for the production of DCLCEs exhibiting broad wavelength tunability, superior flexibility, and robust mechanical characteristics. Focusing on initial color tuning, bubble defect minimization, UV photopolymerization, and coating procedures, this research systematically optimizes the fabrication process through experimental investigation of factors like chiral dopant amount, temperature, UV exposure duration, coating thickness, and speed. The method enabled the successful fabrication of DCLCEs with uniform and controllable coloration, demonstrating the effectiveness of this controlled synthesis approach in significantly enhancing structural color features. Upon stretching to 2.8 times its original length, the center wavelength shifted from 613 nm to 404 nm, yielding a tunable bandwidth of up to 209 nm across the visible spectrum.
研究领域:
材料科学
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光学材料
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高分子化学
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DOI
PubMed
高影响因子
Advanced Optical Materials
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2016
·Vol. 4
·期 5
·798-806
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IF 5.359
Enhai Song,Zitao Chen,Ming Wu,Sha Ding,Shi Ye,Shifeng Zhou,Qinyuan Zhang
In contrast to well-known multiple and fixed upconversion (UC) emission bands from lanthanide (Ln 3+ ) ions activated luminescent materials, room temperature wavelength-tunable single-band UC emissions are designed and demonstrated in Ln 3+ ions/transition metal Yb 3+ /Mn 2+ codoped fluoride perovskites ABF 3 (A = K + , Rb + , and Cs + ; B = Mg 2+ , Zn 2+ , and Cd 2+ ). Upon 976 nm laser excitation, the perovskites ABF 3 :Yb 3+ , Mn 2+ exhibit intense single band UC emission centered at 550–610 nm depending on the substitution of the A + and / or the B 2+ species in ABF 3 . Crystal structure and luminescent properties analysis show that the UC emission should originate from the transitions of super-exchange coupled Yb 3+ –Mn 2+ pair. The Stokes and UC emission properties, UC luminescence decay behaviors, as well as temperature dependent UC emission properties of ABF 3 :Yb 3+ , Mn 2+ are investigated and discussed in detail. The intense room (or high) temperature UC emission and ultralong UC decay lifetimes (≈25–45 ms) clearly reveal that the perovskites ABF 3 :Yb 3+ , Mn 2+ can be potentially applied in the fields of time-resolved luminescence imaging, lighting, and solid state lasers.
研究领域:
材料科学
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光学材料
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无机化学
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光子学
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固体物理
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Wenbo Ji,Fengmei Zhu,Yuan Gao,Jianbei Qiu
Near-infrared (NIR) light sources play a significant role in detection and therapies in healthcare, agriculture, and other fields for their outstanding ability of tissue penetration, excellent safety features, and useful bandwidth that match well with the vibration of chemical bonds. NIR phosphor-converted light-emitting diode (NIR pc-LED) devices are considered to be one of the most promising NIR light sources due to their unique advantages, including tunable wavelength, high efficiency, long life, low cost, and compact size. Compared to traditional resin-based casting technology, which has shortcomings such as complicated packaging process, poor thermal conductivity, and aging of plastic materials, transparent oxide glass-ceramics (GCs) have excellent optoelectronic properties, high physical and chemical stability, simple manufacturing processes, etc. Here, we report the synthesis of a series of Cr3+-doped Ba2–xSrxNaNb5O15 nanocrystals embedded within GCs, which exhibit an ultrabroadband NIR emission covering 600 ∼ 1500 nm under 460 nm blue light excitation, by a two-stage heating-quenching and recrystallization method. It was noticed that as Ba2+ ions in the matrix were increasingly replaced by Sr2+ ions, the peak of the corresponding NIR emission of the GCs continuously shifted from ∼823 to 855 nm, and a photoluminescence quantum yield of ∼39.13% was achieved with the GCs NIR phosphor with an optimal composition. Mechanistic studies showed that the emission originates from the 4T2 → 4A2 spin-allowed transition of Cr3+ ions. NIR pc-LED light source devices were prepared from the optimized GCs and blue light LED chips, and their potential applications in night-vision imaging and nondestructive testing were demonstrated. Our study provides an innovative approach for the design of materials of continuous solid solution transparent oxide GCs with tunable wavelengths and their applications.
研究领域:
材料科学
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光学工程
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生物医学工程
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光电子学
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无机非金属材料
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生物光子学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Hong Yang,Shanshan Zhu,Lihua Pang,Yifei Ma,Xiaoxue Liu,Jinhua Liu
ABSTRACT Using a single emission-wavelength to accurately/sensitively quantify disease markers in complex environments still faces enormous challenges. In this study, we construct a Cu 2+ -triggered wavelength-tunable fluorescent immunoassay for real-time detection of cTnI in human serum. The developed platform is based on an “on-off-on” strategy, which involves the rapid in-situ fluorogenic reaction of dopamine (DA) and phenol analogue by Cu 2+ , strong coupling between PPi and Cu 2+ as well as the specific hydrolysis of PPi into orthophosphate by alkaline phosphatase. By using cTnI as a model antigen, the assay shows good linearity relationships between the fluorescence response and cTnI concentration. Furthermore, we used different phenol analogues (1,3-dihydroxynaphthalene, 8-hydroxyjulolidine, 1,5-dihydroxynaphthalene) as fluorescence reaction substrates to achieve multi-channel (blue, green and yellow) real-time monitoring of cTnI with detection limits of 0.17 ng/mL, 0.17 ng/mL and 0.33 ng/mL, respectively. We successfully applied the wavelength-tunable ELISA to detect cTnI levels in real human serum, and the results were compared with a commercial ELISA with satisfactory outcomes. Therefore, our proposed platform demonstrates great potential in the early diagnosis of acute myocardial infarction.
研究领域:
分析化学
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生物化学
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医学诊断
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心脏病学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Can Chen,Guotong Ruan,Yujie Sun,Lili Wang,Chengwu Zhang,Jinhua Liu
As inorganic pyrophosphatase (PPase) gets involved in the regulation of various pathophysiological procedures, rapid and effective detection of its activity is of great value for monitoring and managing PPase-related diseases. Herein, an in situ Cu 2+ -triggered wavelength-tunable fluorescent sensor for high sensitivity monitoring of PPase activity is constructed. The proposed sensor is based on the principle of Cu 2+ -triggered polymerization of dopamine (DA) and m-phenylenediamine (MPD), the stronger coupling effect of pyrophosphate ion (PPi) and Cu 2+ , and the effective hydrolysis of PPase to PPi. With the change of substituents of MPD, the wavelength of fluorescence polymer nanoparticles (FPNPs) exhibits tunable capacity from 535 nm to 565 nm. Compared with the traditional detection method, as developed sensor shows high sensitivity to PPase with a low detection limit of 0.333 mU/mL in green channel and 0.033 mU/mL in orange channel. Additionally, the sensor realizes PPase sensing in the diluted human serum with excellent recovery in both green and orange models. Furthermore, this sensor is also applicable for inhibition assay of PPase (NaF: IC 50 of 134.7 μM) and logic gates construction. Summarily, as prepared sensor provides one better way for monitoring PPase in diagnostic as well as drug screening.
研究领域:
生物化学
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分析化学
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分子生物学
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生物医学工程
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产品关联
DOI
高影响因子
Nano Materials Science
·
2025
·
IF 17.9
Tianle Wang,Zhenpeng Cheng,Zhaofa Ding,Yiliang Zhang,Yufei Deng,Mingyu Li,Lei Wang,Haifei Lu,Xiaoyan Wen,Sisi Liu
With the development of high-resolution display technologies with vision health consideration, the absent emission wavelengths on the long-wavelength blue light (460 nm to 480 nm) of CsPbBr 3 quantum dots (QDs) has become a crucial hindrance for the wide color gamut displays, and the tunable emission wavelengths via size control can unfortunately suffer from the ligand shedding. In the light of chlorophylls, the CsPbBr 3 QD decorated Ti 3 C 2 nanosheets (CQDTs) are in-situ synthesized with a controllable emission wavelength range from 455 nm to 505 nm at room temperature. The growth rate of CsPbBr 3 QDs can be retarded due to a relatively lower total energy during the adsorption of precursors on Ti 3 C 2 nanosheets, thus the improved monodispersity of resulting QDs in turn results in the photoluminescence quantum yield at 505 nm (∼100%) and at 455 nm (∼42%). Providing with the strong binding energy between CsPbBr 3 QDs and Ti 3 C 2 nanosheets, the decomposition of perovskite can be efficiently hindered, endowing an excellent stability. The enhanced stability of the flexible light-emitting films fabricated with CQDT is witnessed with a remained luminescence intensity of 77% (pristine is 45%) after 40 000 bending cycles, and the CQDT LED possesses the chromatic coordinates of (0.06, 0.61), (0.71, 0.28), (0.12, 0.06) with a ∼107% NTSC color gamut.
研究领域:
材料科学
·
纳米技术
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光电子学
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显示技术
·
钙钛矿量子点
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2017
·
IF 3.473
Liangwei Ma,Chengpeng Li,Qiufeng Liang,Sheng Wang,Derong Cao
We designed and synthesized three new tetraphenylethene (TPE) derivatives ( CZ-TPE , DMA-TPE and TPA-TPE ) modified with different electron rich group (carbazole, N, N -dimethylaniline and triphenylamine segments, respectively) by Knoevenagel condensation reaction. The chemical structures of these compounds are identified by NMR, MS and IR. The absorption and emission of these dyes were investigated by UV-Vis and fluorescence spectroscopy , respectively. The results shown three dyes exhibited evident aggregation-induced emission (AIE) or aggregation-induced emission enhancement (AIEE) properties with wavelength tunable emission. Their emission color can be tuned from green to orange in tetrahydrofuran/H 2 O solutions, from green to red in solid state or pure tetrahydrofuran solutions. In addition, the solution or film of TPA-TPE shown results in distinct fluorescence from “ON” to “Off” observation as well as color change from orange yellow to colorless by naked eyes when the addition of toxic Cl 2 gas, which can be used as an excellent dual chromo- and fluorogenic signal changes that is well suited for monitoring Cl 2 gas in solution, or solid film, conveniently. These results indicate TPA-TPE is a promising candidate chemosensor for the detection of Cl 2 gas.
研究领域:
化学
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材料科学
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分析化学
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）