Polymers
·
2020
·Vol. 12
·期 8
·1779
·
IF 3.426
Yunyi Yang,Yushuang Zhao,Yijie Hu,Xinwen Peng,Linxin Zhong
A new type of sustainable light conversion nanocomposite film was fabricated by using carboxymethyl xylan as matrix and xylan-derived carbon dots (CDs) as both light conversion regents and nano reinforcements. The results demonstrate that CDs can not only significantly enhance the mechanical strength of the nanocomposite film because of chemical reaction between CDs and carboxymethyl xylan, but also impart the film with excellent optical properties. With 1.92 wt% CDs, the tensile strength and elastic modulus of the film are increased by 114.3% and 90.7%, respectively. Moreover, the film has typical excitation and emission spectra, enabling the efficient absorption of UV and the conversion of UV to blue light. This xylan-derived light conversion nanocomposite film is expected to be used in agricultural planting and food packaging.Keywords:hemicelluloses;xylan;biomass;hydrothermal;carbon dots
研究领域:
材料科学
·
可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2021
·
IF 3.314
Xiu Li,Chen Chen,Faqiang Zhang,Hanliang Fang,Xintang Huang,Zhiguo Yi
Developing photostrictive materials with wide visible light response and desirable photostriction strength remains a great challenge in view of practical applications. Ferrites with rich physical and chemical properties have great potential in this regard. Here, the photostrictive performances of three ferrite materials, CdFe2O4, CaFe2O4, and YFeO3, with different crystal structures are systematically investigated. A large photostriction around 0.1% with a decent photostrictive efficiency of ∼10–11 m3/W is obtained for all the three ferrites under 405, 520, and 655 nm laser illumination. Further investigation reveals that the photothermal effect-induced expansion and the light-induced nonthermal part contribute almost equally to the measured shape deformation. In situ X-ray diffraction with external laser illumination in conjunction with the laser power-dependent Raman spectra analysis indicates that the strong photostriction is not a uniform deformation microscopically, which is closely related to the various degrees of response of the lattice planes to light and mainly attributed to the light-induced distortion of FeO6 octahedrons. Further analysis suggests a bond length rule to account for both the difference between their photostrictive performances and the screening of materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SmartMat
·
2022
·Vol. 4
·期 2
·e1153
·
IF 0
Junpeng Ji,Biao Yang,Chaohong Zhang,Yulu Cai,Jingwei Chen,Changbin Zhao,Tao Wang,Lijie Wu,Ming Liu,Junwu Bai,Jiangfeng Wang,Zhongbin Wu,Shufen Chen,Haifeng Ling,Zhongfu An,Yonghua Chen,Jianpu Wang,Wei Huang,Hong Meng
Limited to the structure of traditional light-emitting devices, electronic devices that can directly convert machine language into human visual information without introducing any back-end circuit are still not easy to achieve. Based on a specially designed three-phase co-planar electrode structure, a new type of three-phase alternating current driven organic light-emitting device with the integration of emission and control functions, full-color tunability and simple device structure is demonstrated in this study. We integrate the light-emitting function of color-tunable light-emitting devices and the switching of three triodes in a single three phase organic light-emitting device. The state control of luminous color and luminance intensity merely requires the introduction of a kind of machine language, that is an easy-to-program 6-bit binary number coded digital signals. The color adjustable area covers 66% of the color triangle of the National Television System Committee. Such simple and easy-to-integrate light-emitting system has great potential applications in the next-generation man-machine interface.
研究领域:
电气工程
·
光电
·
材料科学
·
人机交互
✓ 已验证
产品关联
DOI
ACS Applied Nano Materials
·
2023
·
IF 5.9
Songman Ju,Chaomin Mao,Jinping Zheng,Kaiyu Yang,Lihua Lin,Tailiang Guo,Hailong Hu,Fushan Li
Perovskite quantum dots (PQDs) are promising in the field of light-emitting diodes (LEDs) due to their adjustable band gap, high photoluminescence quantum yield, and high color purity. However, ion migration is prone to occur in the device due to the structural instability of PQDs, resulting in the degradation of external quantum efficiency. In this work, we proposed a strategy to realize a perovskite quantum dot light-emitting memcapacitor (PQLEM) so as to enhance the electroluminescent performance of PQDs. By varying the pre-bias voltage and time, the ion distribution and trap density in the PQD film could be modified, thereby affecting the capacitance value and luminous efficiency of the device. Under the memcapacitive effect, the external quantum efficiency (EQE) of the device increases from an initial 2.81 to 7.95%. This work provides a route for achieving perovskite quantum dot light-emitting devices with high luminous efficiency.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Junzhu Yang,Junchen Liu,Yi Zhang,Wei Pei,Qi Xia,Sanyang Han,Yuan Lu
Efficient regeneration of the coenzymes NADH and NADPH is crucial for sustaining biocatalytic processes, particularly in driving the biocatalysis reaction. In this study, the photocatalytic properties of alkali-doped graphitic carbon nitrates were explored to achieve efficient NAD(P)H regeneration. g-C 3 N 4 doped with potassium (KOH), sodium (NaOH), and calcium (Ca(OH) 2 ) was synthesized and characterized, showing significant enhancements in light absorption, charge separation, and photogenerated electron transport. Among the synthesized photocatalysts, KOH-doped g-C 3 N 4 (KCN) exhibited the best photocatalytic performance, regenerating 95 % NADH and 92 % NADPH within 30 min. This result compares favorably with those reported in previous studies. Based on this superior performance, K-0.2 was further applied to the in vitro CO 2 reduction to formate as a proof of concept. To clarify the mechanistic insights of the improved photocatalytic performance of KCN, the chemical model of g-C 3 N 4 and KCN was established, and DFT calculations were performed to reveal the electronic structure modifications responsible for the enhanced photocatalytic activity. Furthermore, to expand the light utilization capability of the system, upconversion nanoparticles (UCNPs) were incorporated into the system to utilize near-infrared light (980 nm), which successfully achieved NADH regeneration under near-infrared excitation and extended the light absorption range of the photocatalytic system. Overall, this study demonstrated that alkali-doped g-C 3 N 4 offered a highly efficient platform for NAD(P)H regeneration, and the integration of UCNPs further enriched the coenzyme regeneration scenario, suggesting a promising strategy for advancing sustainable coenzyme regeneration technologies.
研究领域:
生物催化
·
光化学
·
分子生物学
·
可持续能源
·
酶工程
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·225
·
IF 36.3
Hu Xueyan,Dou Siyuan,Liu Yiming,Li Yaru,Yu Caixia,Wang Jin
The hydrogel achieves an ultra-light water-based structure (0.041 g cm −3 , 52.7 wt% water) by incorporating hollow foaming microspheres.
Sealed air pockets enable ultra-low thermal conductivity (0.034–0.039 W m −1 K −1 ) and over 50 °C thermal shielding under high-temperature conditions.
High solar reflectance (0.94) and infrared emittance (0.84) deliver up to 10.8 °C sub-ambient outdoor cooling.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2021
·Vol. 15
·期 10
·2100278
·
IF 13.138
Qionghua Mo,Chen Chen,Wensi Cai,Shuangyi Zhao,Dongdong Yan,Zhigang Zang
The photoluminescence quantum yield (PLQY) of CsPbBr 3 perovskite nanocrystals (NCs) prepared by the hot-injection method can exceed 90%, which have attracted intensive attention for white light-emitting diodes (WLEDs). However, the whole hot-injection experiment requires air isolation and relatively high temperature. In addition, the poor stability of CsPbBr 3 NCs impedes their applications. Here, a facile method is reported to synthesize CsPbBr 3 @ZrO 2 NCs at room temperature in air. Owing to using ZrO 2 coated CsPbBr 3 NCs, the prepared CsPbBr 3 @ZrO 2 NCs not only present a PLQY of 80% but also exhibit an enhanced stability to heat and moisture. Furthermore, WLEDs are fabricated with CsPbBr 3 @ZrO 2 NCs and commercial red phosphors (CaAlSiN 3 :Eu 2+ ) on blue LEDs chips. The fabricated WLEDs exhibit a correlated color temperature (CCT) of 4743 K and luminous efficacy as high as 64.0 Lm W –1 . In addition, visible light communication with a high data rate of 33.5 Mbps is achieved using the WLEDs. This work provides a room temperature strategy to coat zirconia for CsPbBr 3 @ZrO 2 NCs, benefiting to enhance the optical performance and stability, as well as the promotion of the great potentials in solid-state illuminating and visible light communication applications.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Shuangyi Zhao,Siqi Jiang,Wensi Cai,Ru Li,Qionghua Mo,Baiqian Wang,Zhigang Zang
High-performance white-light-emitting diodes (WLEDs) are regarded as a promising next-generation solid-state light source. However, a low-color-rendering index (CRI), consumption of rare-earth elements, and inevitable self-absorption remain the major challenges for high-performance WLEDs. Here, lead-doped Cs 3 Cu 2 Br 5 nanocrystals (NCs) with a zero-dimensional structure are prepared to facilitate stable and intrinsic white-light emission (IWE) without phosphors and other compositions. The lead dopants are expected to be centers of isolated [PbBr 6 ] octahedrons, in which self-trapped excitons originating from distorted octahedra can form. Subsequently, a broadband blue photoluminescence (PL) from the Cs 3 Cu 2 Br 5 and a broadband red PL from the lead doping are observed, exhibiting intrinsic white-light emission overall. The doped Cs 3 Cu 2 Br 5 NCs are then employed to fabricate WLEDs, which possess a high CRI of 98 and an excellent 200-h operating stability.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 25
·2424645
·
IF 19
Zhefeng Liu,Rui Wang,Jianing Han,Tianhao Chen,Zichao Deng,Yalan Sun,Yongbin Zhao,Aihua Chen
Wearable blue-green photodetectors have attracted considerable attention in underwater and medical applications. However, semiconductor-based photodetectors generally suffer from inevitable performance deterioration because of elastic modulus mismatch between rigid inorganic materials and polymer matrixes. Besides, most of the photodetectors reported so far can't be used on both sides and the multiple functionalizations can only be realized by stacking different types of devices. Herein, an intrinsically flexible and size-customizable blue-green photodetector has been fabricated based on well-designed composite fabrics with oriented electrospun fibers, consisting of pseudo-stilbene azobenzene-containing cross–linked liquid crystalline polymers (NAzo-CLCP) and piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanogenerator. Taking advantage of the synergistic effect between liquid crystalline alignment and polymer networks, the NAzo-CLCP devices construct a consecutive and efficient conversion of illuminance – internal stress – electric signal. A responsivity of 233 mV W −1 is achieved in voltage signals and a comparable response time of 0.1 s in current signals compared to the reported wearable semiconductor-based photodetectors. Benefiting from the inherent flexibility and compatibility of the hydrophobic fabrics, the NAzo-CLCP devices exhibit robust stabilities under cyclic irradiations, humidity and temperature variations, and especially slightly dynamic conditions, fulfilling basic requirements for wearable electronics. For practical applications, a photodetector array for light positioning based on blue light and a bracelet for real-time health monitoring based on green light are developed. Profiting from the uniformity of the fabrics and the consistency of detection performance, the integrated bifunction of code transmission and health monitoring over a double-sided one-piece photodetector has been realized for the first time, providing extensive potential for wearable electronics based on the NAzo-CLCP fabrics.
研究领域:
生物医学工程
·
柔性电子学
·
光电传感
·
可穿戴设备
·
转化医学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaobin Wang,Changyu Li,Zhuoyi Li,Xu Ma,Danke Chen,Xinyi Wan,Zheng Deng,Renren Deng,Xinsheng Peng
The existing white light-emitting diodes (WLEDs) are mostly fabricated with downshifting phosphors and ultraviolet (UV) or blue light LED chips. To achieve unconventional upconversion white-light-emitting phosphors, a novel strategy by encapsulating upconversion nanoparticles and organic dyes into metal–organic frameworks (MOFs) at room temperature is put forward. Herein, lanthanide-doped upconversion nanoparticles (NaYF 4 :Yb,Tm@NaYF 4 core–shell UCNPs), dye 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) and dye Coumarin 6 (C6) with blue, red and green light emission, respectively, are encapsulated together into ZIF-8 through a facile one-pot solid-confinement conversion process. Owing to their appropriate spectral overlaps and efficient energy transfer processes between two pairs of UCNPs/DCM and UCNPs/C6 within ZIF-8, the optimized UCNP/DCM/C6@ZIF-8 thin film exhibits high-quality white-light emission upon a commercial 980 nm LED chip with ideal CIE coordinates of (0.33, 0.33), high color rendering index (CRI) value of 93 and moderate correlated color temperature (CCT) value of 5567 K. This strategy paves the way for other upconversion phosphorous nanoparticles and fluorescent molecules for WLEDs applications excited by near infrared light.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jun Xiao,Dongqing Liu,Haifeng Cheng,Yan Jia,Shen Zhou,Mei Zu
As a new method for producing dense ceramics with complex structures, digital light processing 3D printing technology has received considerable attention when applied to polymer-derived ceramics. In this study, using acrylate monomers, we developed a material system to modify the polysilazane preceramic polymers. Furthermore, during photopolymerization , the photocuring thickness was tuned using carbon nanotubes as light absorbers, thus improving the printing accuracy. The green body was printed and subsequently pyrolyzed to obtain the SiCN ceramic. We then managed to completely maintain the printed structure with uniform shrinkage being observed in all directions. The printed ceramic microstructures, denoting pyrolysis-induced microstructural changes, were characterized using scanning electron microscopy, X-ray diffraction, and transmission electron microscopy . This study paves the way for developing new approaches to obtain ultra-light and high-strength microwave-absorbing components that are suitable for aerospace applications by combining the SiCN ceramics of the unique dielectric properties with 3D printing technology to produce dense ceramics with periodic 3D structures.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Wei Zeng,Mingjun Wang,Yuan Li,Jiawei Wan,Huihui Huang,Hong Tao,David L. Carroll,Xingzhong Zhao,Dechun Zou,Guojia Fang
A semi-closed tubular light-trapping geometry is developed for dye sensitized solar cell to stabilize its power conversion efficiency (PCE) in wide light intensity range. The tubular cell consists of a dye-sensitized porous TiO 2 coated and semi-closed glass tube as photoanode, an opaque platinum metal foil wrapped on the outside of photoanode as counter electrode, and electrolyte filling in their interlayer . The open end of photoanode serves as the only light entrance. The experiment, calculation and optical studies demonstrated that the tubular geometry is beneficial to light trapping and absorption, charge transport and heat dissipation, in comparison to a planar counterpart. The PCE of tubular cell can remain about 85% of its original value even if the irradiated light intensity increases from 1 to 5 Sun, in contrast, that of planar counterpart decreases to about 60% of its original value. This feature makes the tubular cell has potential as an effective light collector in low-cost condenser solar cell system.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）