Advanced Science
·
2022
·Vol. 9
·期 22
·2201844
·
IF 17.521
Zong-Tao Li,Hong-Wei Zhang,Jia-Sheng Li,Kai Cao,Ziming Chen,Liang Xu,Xin-Rui Ding,Bin-Hai Yu,Yong Tang,Jian-Zhen Ou,Hao-Chung Kuo,Hin-Lap Yip
Tandem structures with different subpixels are promising for perovskite-based multicolor electroluminescence (EL) devices in ultra-high-resolution full-color displays; however, realizing excellent luminance- and color-independent tunability considering the low brightness and stability of blue perovskite light-emitting diodes (PeLEDs) remains a challenge. Herein, a bright and stable blue gallium nitride (GaN) LED is utilized for vertical integration with a green MAPbBr 3 PeLED, successfully achieving a Pe-GaN tandem LED with independently tunable luminance and color. The electronic and photonic co-excitation (EPCE) effect is found to suppress the radiative recombination and current injection of PeLEDs, leading to degraded luminance and current efficiency under direct current modulation. Accordingly, the pulse-width modulation is introduced to the tandem device with a negligible EPCE effect, and the average hybrid current efficiency is significantly improved by 139.5%, finally achieving a record tunable luminance (average tuning range of 16631 cd m −2 at an arbitrary color from blue to green) for perovskite-based multi-color LEDs. The reported excellent independent tunability can be the starting point for perovskite-based multicolor EL devices, enabling the combination with matured semiconductor technologies to facilitate their commercialization in advanced display applications with ultra-high resolution.
✓ 已验证
DOI
高影响因子
Matter
·
2025
·
IF 17.5
Chen Yang,Baoyi Wu,Huijie Wang,Qian Zhao,Di Chen
Shape-shifting materials are bases of soft machines to accomplish sophisticated tasks. While significant progress has been made in diversifying shape transformation behaviors, current evolution pathways are determined by pre-programming approaches, limiting real-time adaptability and flexibility during operation. Here, we report a dynamic covalent polymer network swollen with a nonvolatile aliphatic acid mixture, which enables multi-shape memory properties. During shape-shifting, ultraviolet light is employed to spatially lock the geometries through disulfide bond exchange, allowing the on-demand adjustment of shape evolution. Additionally, the introduction of a photothermal azobenzene derivative allows the gel to undergo sequential shape recovery upon near-infrared light irradiation. This design facilitates real-time control of shape evolution through orthogonal light, overcoming the constraints of pre-programming. Building on this, the polymer is employed as a functional switch with an error-correction capability to enhance electrical safety. The versatility and adaptability of our strategy exhibit great potentials to fabricate future shape-shifting devices.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Liusha Cen,Fan Yu,Yunying Luo,Chengcai Li,Guojin Liu,Wangyong Jin,Hailin Zhu,Yuhai Guo
The construction of a novel ofloxacin degradation catalyst coupled with photocatalysis and PMS activation is of great significance for the regeneration of water resources. A ternary metal (Co, Zn and Mo) sulfide heterojunction with biomimetic flower structure was synthesized using the solvent heat method. And then PVDF@CoZnMoSx membranes were synthetised by researched solvent-assisted nanoparticle embedding (SANE) method, which yielded efficient ofloxacian (OFX) degradation (97.1 %) by PMS activation. The effects of actual environment (such as co-exist ions, organic matter, and actual water matrices) on OFX degradation were observed, and PVDF@CoZnMoSx-3 (Zn:Co = 3:1, PCZM3) exhibited good tolerance for these factors and application value in practice. The pathways of OFX degradation were clarified by LC-MS analysis, and T.E.S.T software simulated the toxicity of the intermediates (P1-P20) gained from LC-MS, which substantiated the efficacy and safety of the PCZM3/PMS system in OFX degradation. The reusability and stability analysis displayed that the OFX degradation of PCZM3/PMS system was maintained in 5 consecutive cycles without additional treatment, and a small number of ions (Co, Zn and Mo) were leached during the OFX degradation. Totally, a new strategy was raised to construct multivariate metal sulfide membranes and couple the photocatalysis and PMS activation, which provided new insights for catalyst membranes to optimize performance.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 36
·2401297
·
IF 18.5
Lu Wang,Zhen-Huang Su,Yang Shen,Shi-Chi Feng,Feng-Ming Xie,Kai Zhang,Ke-Fan Meng,Xingyu Gao,Jian-Xin Tang,Yan-Qing Li
Metal halide perovskite light-emitting diodes (PeLEDs) are gaining increasing attention as a promising candidate for the new-generation display technology. Although tremendous progress has been witnessed in this field, the device performance of blue PeLEDs still lags far behind that of the green and red counterparts. In this work, an effective interfacial engineering is employed to boost the radiative recombination of blue perovskite film by introducing a multifunctional tetraethyl orthosilicate (TEOS) network on the grain-growth substrate. Benefitting from the strong interaction between the TEOS molecule and perovskite nuclei, the perovskite crystallization dynamics are effectively regulated, contributing to significantly improved emitting film with uniformly distributed halogen and concentrated low-dimensional domain. Additionally, the TEOS network can distinctly passivate the crystal defects at the buried perovskite interface owing to its adequate electron-donating sites. Consequently, the target blue PeLEDs featuring a stable emission peak at 488 nm exhibit a champion external quantum efficiency of 17.3%, which is among the highest values to date. The results demonstrate the critical role of the surface molecular characteristics of the grain-growth substrate in regulating the mixed-halide blue perovskite crystallization.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jiakang Hu,Qiaohui Ruan,Yanyu Cui,Siyuan Ye,Zhuohan Lin,Xue Zhang,Yan Li
CsPbI3 nanoplatelets (NPLs) are considered potential candidates for orange-red light-emitting materials due to their high exciton binding energy and narrow full width at half maximum (FWHM). However, the relatively low formation energy of CsPbI3 NPLs leads to rapid growth rates, posing a challenge for the controlled synthesis of high-quality CsPbI3 NPLs. Herein, we report the synthesis of high-quality CsPbI3 NPLs emitting orange-red light using a one-pot method under mild reaction conditions. The protonation of oleylamine (OAm) by introducing HI and the strong interaction between the octadecylphosphonic acid (ODPA) ligand and Pb2+ facilitate the anisotropic growth of CsPbI3 NPLs and enable precise control over the numbers of NPL layers, achieving the desired orange-red light emission. The resulting CsPbI3 NPLs exhibited a high photoluminescence quantum yield (PLQY) of up to 90%, a narrow FWHM of only 25 nm, and excellent stability at room temperature, under ultraviolet–visible light and in aqueous environments. The comprehensive study of the formation process of CsPbI3 NPLs enriches our understanding of the growth mechanism and provides a synthetic route for producing high-quality CsPbI3 NPLs.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Kexin Man,Hao-Nan Li,Guang-Chang Xu,Hong-Yu Fan,Yi-Zhou Chen,Chao Zhang,Zhi-Kang Xu
Controllable and versatile manufacturing of nanocomposite hydrogels is highly desirable for attaining preferential performance and pushing their applications. However, the conventional thermal-initiated method suffers from sluggish and uncontrollable bulky gelation, whereas the photo-initiated method is controllable yet is limited by a special wavelength of light and is ineffective for hydrogel precursors containing light-absorbing conductive/magnetic nanomaterials. Herein, these limitations are fundamentally overcome, and a new concept of photothermal nanotrigger (PTNT) is discovered that leverages the classic photothermal effect of light-absorbing nanomaterials to transform uncontrollable thermal initiation into a new photo-controlled initiation. The design of PTNT is universal and can be extended for arbitrary photothermal nanomaterials from 2D nanosheets to 1D nanotubes and 0D nanoparticles, exhibiting high gelation efficiency and superior compatibility to broad-spectrum light from visible to ultraviolet and near-infrared. Intriguingly, the PTNT approach can be imparted with excellent spatially-programmable printability by introducing viscous and low thermally-conductive glycerol to confine the photothermal-generated heat and eliminate the diffusion of the formed free radicals to the unexposed region, enabling the manufacturing of high-resolution and heterogenous architecture. Moreover, in addition to the basic initiation function, the PTNT can parasitize the hydrogel network to find many additional applications in the fields of flexible electronics, light/magnetic-manipulated soft robotics, and beyond.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Li Zeng,Tongjiang Peng,Hongjuan Sun,Jingjie Yang,Yao Li,Yating Qin
A series of Fe-doped LaNi 1-x Fe x O 3 perovskite oxide photocatalytic materials was prepared using a sol-gel method. The phase composition and morphology of LaNi 1-x Fe x O 3 samples were characterized via X-ray diffraction, scanning electron microscopy, transmission electron microscopy , X-ray photoelectron spectroscopy, and other analytical methods. The photocatalytic performance of the samples was tested by assessing the degradation rate of methyl orange. According to the results, Fe-doping caused the lattice distortion of the initially cubic of LaNiO 3 to a rhombohedral crystal system . In turn, partial substitution of Ni with Fe was found to increase the amount of oxygen vacancies , resulting in the higher mobility of lattice oxygen and thus improving the photocatalytic activity . The best photocatalytic performance was found in a LaNi 0.95 Fe 0.05 O 3 sample with a 5% Fe dopant concentration. Furthermore, the degradation rate of methyl orange in LaNi 0.95 Fe 0.05 O 3 within 120 min of visible light irradiation was as high as 98.89%, and its good degradation effect even with respect to other organic dyes such as methylene blue and rhodamine B. Finally, LaNi 0.95 Fe 0.05 O 3 was shown to maintain high photocatalytic activity and excellent recyclability even after numerous operation cycles.
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2019
·Vol. 93
·期 2
·393-399
·
IF 0.581
Baogang Wang,Bin Zhao
Abstract Carbon dots (CDs)/CoFe 2 O 4 mesporous nanosphere composites were prepared. In comparison with CoFe 2 O 4 , the CDs/CoFe 2 O 4 composites exhibited the enhanced photocatalytic activity in the degradation of methylene blue (MB) in the presence of H 2 O 2 under the visible light irradiation. Specifically, the degradation rate attained using the CDs(4 wt %)/CoFe 2 O 4 composite was about 3.65 times higher than that with neat CoFe 2 O 4 . Moreover, the CoFe 2 O 4 paramagnetic nanospheres allowed facile repeatable use of CDs/CoFe 2 O 4 composites after magnetic separation. After five runs, the reduction of degradation rate was less than 5%, reflecting favorable photostability and magnetic separability of CDs/CoFe 2 O 4 composites. The CDs not only enhanced visible light utilization efficiency of CoFe 2 O 4 due to up-conversion photoluminesence, but also promoted the transfer and separation of electron-hole pairs as a result of their outstanding charge transfer characteristics, which collectively accelerate the generation of reactive species (such as • \({\text{O}}_{2}^{ - }\) , • OH, and h + ) in the presence of H 2 O 2 .
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Senshen Yu,Pengfei Lv,Pan Xue,Kai Wang,Qian Yang,Junhui Zhou,Meng Wang,Ling Wang,Biqiang Chen,Tianwei Tan
Natural photosynthesis plays an important role in maintaining environmental carbon balance. Taking inspiration from this, we developed a light-driven, enzymatic nanosystem for the highly selective production of formic acid from CO 2 . The system combines photocatalytic graphitic carbon nitride (g-C 3 N 4 ) with two natural enzyme catalysts, carbonic anhydrase (CA) and formate dehydrogenase (FateDH), encapsulated in ZIF-8, a porous metal-organic framework (MOF). Efficient in situ regeneration of reduced nicotinamide adenine dinucleotide (NADH) is realized through visible-light irradiation of g-C 3 N 4 with a suitable redox potential (−0.3 V (NHE)). The introduction of ZIF-8 ensures a large amount of loaded protein with little damage to enzyme activity, and its encapsulation of CA and FateDH shortens the distance between the enzymes. This is conducive to increasing the diffusion of substances during the CO 2 -to-formic acid cascade reaction, thus improving the reaction efficiency. This work is expected to provide new insight into the design and development of highly selective, artificial photosynthesis systems to efficiently convert CO 2 into fuels, chemicals, and other materials.
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 31
·1801139
·
IF 13.325
Ning Ma,Ming-Kang Zhang,Xiao-Shuang Wang,Lu Zhang,Jun Feng,Xian-Zheng Zhang
Telluride molybdenum (MoTe 2 ) nanosheets with wide near-infrared (NIR) absorbance are functionalized with polyethylene glycol-cyclic arginine-glycine-aspartic acid tripeptide (PEG-cRGD). After loading a chemotherapeutic drug (doxorubicin, DOX), MoTe 2 -PEG-cRGD/DOX is used for combined photothermal therapy and chemotherapy. With the high photothermal conversion efficiency, MoTe 2 -PEG-cRGD/DOX exhibits favorable cells killing ability under NIR irradiation. Owing to the cRGD-mediated specific tumor targeting, MoTe 2 -PEG-cRGD/DOX shows efficient accumulation in tumors to induce a strong tumor ablation effect. MoTe 2 -PEG-cRGD nanosheets, which are relatively stable in the circulation, could be degraded under NIR ray. The in vitro and in vivo experimental results demonstrate that this theranostic nanoagent, which could accumulate in tumors to allow photothermal imaging and combined therapy, is readily degradable in normal organs to enable rapid excretion and avoid long-term retention/toxicity, holding great potential to treat tumor effectively.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Jiang Cheng,Xuelian Yan,Qionghua Mo,Bitao Liu,Jun Wang,Xin Yang,Lu Li
A g-C 3 N 4 /BiVO 4 composite photocatalyst with enhanced photocatalytic activity and photoelectrochemical (PEC) performance was fabricated via a simple synthesis method with BiVO 4 nanofibers as starting material. The materials were characterized with different techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FT-IR), N 2 absorption–desorption isotherm (BET) and photoluminescence spectroscopy (PL). The results showed that this synthesis method is effective to make a composite. The photocatalytic evaluation indicates that the photocatalytic activity of the g-C 3 N 4 /BiVO 4 photocatalyst for methylene blue (MB) was about 8 and 7 times higher than that of pure BiVO 4 and g-C 3 N 4 , respectively. This should be due to the enhanced light harvesting ability and to the effective electron transfer during the photocatalytic reaction.
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Wenjun Ni,Meng Li,Jiayi Cui,Zipeng Xing,Zhenzi Li,Xiaoyan Wu,Erlin Song,Mancheng Gong,Wei Zhou
The black TiO 2 nanoparticles are synthesized via a facile calcination method combined with an in-situ controllable solid-state reaction approach. The results indicate that the photocatalyst with a narrow band gap of ~ 2.32 eV extends the photoresponse to visible light and near infrared region. And thus more reactive oxygen species can be obtained to induce the cell-killing under 808 nm light triggering. The as-obtained black TiO 2 nanoparticles exhibiting low toxicity, good biocompatibility and high anticancer effect in vitro, is demonstrated as efficient photosensitizers for phototherapy to kill the bladder cancer cells. These findings suggest that the facile synthetic black TiO 2 nanomaterials will have broad application in biomedicine.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）