POLYMER TESTING
·
2025
·
IF 6
Ke Li,Lu-Ming Zhou,Yun-Xiao Zhang,Yuan-Xiang Zhou
Electrical treeing is a primary degradation pathway in cross-linked polyethylene (XLPE) cable insulation, making enhancement of the tree-initiation voltage (TIV) critical for reliable high-voltage operation. We report a peroxide-assisted grafting strategy that covalently incorporates 2-vinylanthraquinone (VAQ) into XLPE during standard crosslinking, thereby addressing the migration and durability limitations of physically blended stabilizers. The grafted VAQ introduces deep electronic traps and mitigates defect-driven degradation, increasing the characteristic TIV by more than 160 % and markedly suppressing tree growth under AC voltage. This migration-resistant, trap-engineered stabilization provides a practical route to improve long-term insulation reliability and is directly relevant to the design of ultra-high-voltage polymeric cables.
研究领域:
高分子材料科学
·
电气工程
·
绝缘技术
·
功能材料
·
电力系统可靠性
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 24
·17182-17190
·
IF 2.9
Zhe-Yong Chen,Xue Ren,Hui-Ling Hu,Meng Liu,Yi Liu,Feng-Lei Jiang
ZnSeTe quantum dots (QDs) attract growing interest owing to their low threats to health and the environment. They are widely applied as emitters in displays and lighting devices. Previous findings have indicated that inorganic halides are excellent candidates for surface ligands on QDs. By incorporating inorganic halides during the synthesis process, the photoluminescence (PL) intensity and quantum yield (QY) of QDs can be significantly enhanced. However, the alteration of surface states in QDs induced by zinc halide modification and the mechanism of formation of trap-state radiative recombination processes have been less discussed. Herein, we proposed a synthesis strategy for ZnSeTe/ZnSe/ZnSeS/ZnS core/shell/shell/shell QDs modified with ZnCl2, and by comparing the morphology and elemental composition of QDs with different amounts of ZnCl2 added, we revealed the regulatory mechanism of nanocrystal growth in the presence of ZnCl2. QDs with modification of ZnCl2 exhibited broad yellow fluorescence, distinct from the intrinsic blue emission. Through spectroscopic and surface ligand analyses, we attributed this yellow emission to the intermediate state energy levels caused by the defects on the surface. Finally, we used the QDs with broad linewidth emission to fabricate a simple white-light-emitting diode (WLED). This work provided new insights into the role of inorganic ligands and the use of a single emitting material in solid-state lighting devices.
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuang Yang,Zhenyu Tang,Bo Qu,Lixin Xiao,Zhijian Chen
Copper (Cu)-based perovskites are promising for lead-free perovskite light-emitting diodes (PeLEDs). However, it remains a significant challenge to achieve high performance devices due to the nonradiative loss caused by the disordered crystallization and lack of passivation. Crown ethers are known to form host–guest complexes by the interaction between C–O–C groups and certain cations, and 18-crown-6 (18C6) with an appropriate complementary size can interact with Cs+ and Cu+ cations. Herein, we studied the interaction between CsCu2I3 and two crowns with the same cyclic size, 18C6 and dibenzo-18-crown-6 (D18C6). Particularly, D18C6 can reduce the nonradiative recombination rate of CsCu2I3 film by passivating the defects and optimizing the film morphology effectively. The room mean square (RMS) decreased from 5.06 to 2.95 nm, and the PLQY was promoted from 4.71% to 19.9%. Besides, D18C6 can also decrease the barrier of hole injection. The PeLEDs based on D18C6-modified CsCu2I3 realized noticeable improvement with a maximum luminance and EQE of 583 cd/m2 and 0.662%, respectively.
研究领域:
材料科学
·
光电化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Yang Feng,Yuxian Zhou,Xinyi Yang,Zili Huang,Jiaxi Hu,Yi Lv
With the growing demand for highly efficient sensors capable of rapid and reliable detection of trap states in semiconductors, developing novel chemical and physical phenomena induced by trap states at nanomaterial interfaces has thus emerged as a critical technological field. Herein, we developed an innovative time-dependent chemiluminescence (CL) method for evaluating trap states in semiconductor materials. By leveraging the unique trap states of Cr3+-activated zinc gallate (ZGOC) semiconductors and the hydroxyl radical (·OH)-rich EDTA-Fe2+-H2O2 system, we achived rational manipulation of ·OH-triggered time-dependent near-infrared (NIR) CL induction. To extract high-information-density outputs from the CL response, ZGOC nanocrystals associated with different Cr3+-related trap states were precisely identified by a distinct CL “fingerprint” pattern and robust statistical analysis. Remarkably, the generalizability of this method was validated using mixed models containing two typical samples and other adjustable ZGOC systems. The developed CL probe for Cr3+-related trap state evaluation provides advantages such as cost-effectiveness, operational simplicity, and rapid response, offering a promising and innovative alternative to conventional trap state assessment methods.
研究领域:
材料科学
·
化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Mingrui Zhang,Feng Guo,Qingzhong Zhou,Tian Zhong,Biao Xiao,Liyong Zou,Qingliang You,Baogui You,Yang Li,Xueqing Liu,Hongjiao Liu,Jun Yan,Jiyan Liu
Device performance enhancement in quantum dot light-emitting diodes (QLEDs) is realized by adding a small amount of insulating polymer polymethyl methacrylate (PMMA) into the emitting quantum dot layer. Pool-Frenkel effect is observed through temperature-dependent current density-voltage experiments, indicating the important role of trap states, and the addition of the insulating PMMA helps to reduce the Poole-Frenkel barrier hence the trap depth. Reduced density and depth of trap states with PMMA are indeed observed through further capacitance measurements . This work contributes to a better understanding on the effects of traps in QLEDs.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2021
·Vol. 146
·期 12
·3810-3817
·
IF 4.616
Fuxing Xu,Weimin Wang,Liuyu Jin,Bingjun Qian,Chuan-Fan Ding
The effective electric field radius is a fundamental parameter of ion traps, and it has a significant influence on ion-trapping capability, signal intensity, mass range and some other properties of the ion trap. For a quadrupole ion trap built with ideal hyperbolic electrodes, its effective electric field radius can be obtained by its geometrical size, while it is very difficult to obtain the effective electric field radius for a non-hyperbolic ion trap. In this study, the effective electric field radius of a linear ion trap and some ceramic rectilinear ion traps (cRITs) were investigated via the digital ion trap technology. The dipole frequency of supplementary AC for excitation was locked at a certain value of the main RF trapping wave, and the characteristic q values for excitation could be determined accordingly. The q values could be further used to calculate the effective electric field radius through theoretical calculations. A linear equation had been fitted between the q values for excitation and the square of period T2 through experiments subsequently. The relative deviation between the measured electric field radius and the simulative electric field radius is less than 2%. The simulation results and experimental validation show that the approach has predictive power for modeling and measuring the effective field radius of non-hyperbolic ion traps. It is certainly significant for further understanding the performances of non-hyperbolic quadrupole systems.
研究领域:
分析化学
·
质谱分析
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Caiqiao Xiong,Huihui Liu,Chaozi Liu,Jinjuan Xue,Lingpeng Zhan,Zongxiu Nie
The physical properties of microparticles, such as mass, size, and density, are critical for their functions. The comprehensive characterization of these physical parameters, however, remains a fundamental challenge. Here, we developed a particle mass spectrometry (PMS) methodology for determining the mass, size, and density of microparticles simultaneously. The collisional cross-section (CCS) and mass spectrometry (MS) measurements were performed in a single quadrupole ion trap (QIT), and the two modes can be switched easily by tuning the electric and gas hydrodynamic fields of the QIT. The feasibility of the method was demonstrated through a series of monodispersed polystyrene (PS) and silica (SiO2) particle standards. The SiO2/polypyrrole core–shell particles were also successfully characterized, and the measured results were verified by using conventional methods.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 39
·25476-25481
·
IF 3.906
Shenglong Chu,Shusheng Pan,Guanghai Li
CsPbCl3 is a promising material to construct future short wavelength optoelectronic devices based on inorganic perovskite semiconductors. In this study, CsPbCl3 microcrystals were synthesized by a solution phase process. It was found that the photoluminescence (PL) intensities of the CsPbCl3 microcrystals can increase by up to five times under persistent irradiation of UV light without peak shifting, accompanied with an increased absorption coefficient above the band gap and decreased PL lifetime. This PL enhancement is a reversible process with excitation light switching on and off. The photoactivation process of the CsPbCl3 microcrystals is attributed to the passivation of the trap states.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2015
·
IF 0.754
Fu-Xing XU,Qian-Kun DANG,Yin-Juan CHEN,Kai YANG,Qiang WANG,Bin CHEN,Yuan-Yuan WANG,Chuan-Fan DING
A fast mass analysis method using digital ion trap technology was reported. The mass analysis was realized by scanning the frequency of digital RF voltage and dipole ion resonance voltage during ion injection period without the conventional ion cooling, ion resonance ejection or ion cleaning process. It can decrease about three fourth of traditional analysis time using ion trap mass spectrometry. The ion signal was optimized through the modification of frequency scanning rate, ion gate voltage and other experimental parameters. For example, an optimal mass spectroscopy of reserpine ( m / z 609) and arginine ( m / z 174) were obtained when the ion gate voltage was 9 V and the digital RF frequency was scanned from 1 MHz to 400 kHz at rate of 2385 Th s −1 . The results indicated that the obtained mass spectra were in very good agreement with conventional analytical method using ion trap mass analyzer.
研究领域:
分析化学
·
药物分析
·
质谱技术
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产品关联
DOI
高影响因子
LETTERS IN APPLIED MICROBIOLOGY
·
2016
·Vol. 62
·期 4
·349-353
·
IF 1.579
Su H.N.,Xu Y.Y.,Wang X.,Zhang K.Q.,Li G.H.
A total of 11 bacterial strains were assayed for bacteria‐induced trap formation in the nematode‐trapping fungus Arthrobotrys oligospora YMF1·01883 with two‐compartmented Petri dish. These strains were identified on the basis of their 16S rRNA gene sequences. Volatile organic compounds (VOCs) of eight isolates were extracted using solid‐phase micro‐extraction (SPME) and their structures were identified based on gas chromatography‐mass spectrometry (GC‐MS). At the same time, all isolates were used for quantitative measurement of ammonia by the indophenol blue method. The effects of pure commercial compounds on inducement of trap formation in A. oligospora were tested. Taken together, results demonstrated that the predominant bacterial volatile compound inducing trap formation was ammonia. Meanwhile, ammonia also played a role in other nematode‐trapping fungi, including Arthrobotrys guizhouensis YMF1·00014, producing adhesive nets; Dactylellina phymatopaga YMF1·01474, producing adhesive knobs; Dactylellina cionopaga YMF1·01472, producing adhesive columns and Drechslerella brochopaga YMF1·01829, producing constricting rings.
研究领域:
微生物学
·
生态学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Peipei Shao,Siyuan Huang,Bowen Li,Qingjiao Huang,Yiwen Zhang,Rui-Tao Wen
Titanium dioxide (TiO 2 ) draw great attention in developing electrochromic devices due to its low cost, dual-band optical modulation and wide potential window complementary to other EC films. Akin to other electrochromic oxides, TiO 2 suffers from the tradeoff between cycling stability and large optical modulation because of the ion trapping effect. In this paper, we find formation of β-traps can be prevented through adjusting the applied duration time at high potential, thus β-traps induced bleached state degradation in amorphous TiO 2 films can be eradicated. More importantly, we show the formed β-traps locate at the TiO 2 /electrolyte interface, and are independent of the employed electrolyte systems. The TiO 2 based full electrochromic devices confirm β-traps can be suppressed in a full device fashion. This work paves the way to understand the electrochromic performance degradation for oxide films upon square wave cycling and lays the foundation for adaptation in EC devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Hao Song,Ziyi Zhang,Yuan Xue,Dawei Wang,Xu Tian,Jie Yu
Low-dimensional lead-free metal halide perovskites have garnered significant attention due to their potential applications in nondestructive testing. However, achieving scintillators that facilitate efficient X-ray imaging remains a major challenge, primarily due to the inherent difficulty of low concentration in deep traps. Here, a novel design strategy is introduced that modulates A-site element occupancy, thereby fine-tuning the electronic structures and photophysical properties of perovskites. We present a novel zero-dimensional halide perovskite Rb 4 CdCl 6 :Mn 2+ , A + (where A + represents Li + , Na + , K + , Ag + ). The trap-regulated generation of additional Cl vacancies significantly enhances the afterglow performance, thereby enabling its applications in high-temperature X-ray imaging, and thermally stimulated imaging. Notably, Na + -doped Rb 4 CdCl 6 :Mn 2+ exhibits optimal trap distribution and superior thermally quenched-resistant radioluminescence, with a light yield 1.4 times higher at 493 K compared to room temperature. Moreover, the prepared film exhibits a detection limit as low as 63.5 nGy s −1 in high-temperature environments, along with a spatial resolution exceeding 20 lp mm −1 . Upon cessation of irradiation, intense X-ray persistent luminescence emission (X-PersL) is triggered under thermal stimulation, realizing delayed imaging, which can be attributed to charge carrier compensation and redistribution mechanisms. This work proposes an innovative design strategy for high-efficiency perovskite scintillators, expanding their applications in advanced X-ray detection.
研究领域:
材料科学
·
核医学
·
生物医学工程
·
医学影像学
·
无机功能材料
·
辐射探测
·
非破坏性检测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）