ORGANIC ELECTRONICS
·
2025
·
IF 2.6
Zhoujian Fan,Kuibao Yu,Hailong Hu
Quantum dot light-emitting devices (QLEDs) exhibit unique advantages for high-resolution display applications. However, as pixel size decreases, challenges including insufficient hole injection and leakage current become increasingly pronounced, resulting in significant degradation in device performance. Herein, dual hole injection layers are constructed by self-assembly of an organic small molecular layer on conventional PEDOT:PSS to smooth the potential barrier, thus achieving more balanced carrier injection. An ultrafine inter-pixel isolation structure is designed as a charge blocking layer surrounding the photolithograpic pixels, with the purpose of effectively mitigating leakage current in the non-emitting region. The high-resolution devices show a high external quantum efficiency (EQE) of 19.6 % and a peak power efficiency (PE) of 20.63 lm/W, both of which significantly exceed the performance of the control device (EQE = 14.6 %, PE = 10.54 lm/W).
研究领域:
光电子学
·
纳米技术
·
材料科学
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Wenlong Liu,Jianbo Wang,Jiahua Wei,Di Li,Jin Zong,Qibin Yuan
In the field of multifunctional electronic components, multiferroic material which possesses both ferroelectricity and ferromagnetism has important application prospect. Here, the Bi 0.89 Tb 0.11 Fe 0.96 Mn 0.02 Co 0.02 O 3 /Zn 1-x Ni x Fe 2 O 4 (BTFMCO/ZN x FO) bilayer thin films ( x = 0.0, 0.1, 0.2, 0.3, 0.4) are fabricated by the sol-gel spin-coating technique. The influence of ZN x FO magnetic layer on the structural, dielectric, ferroelectric, and ferromagnetic properties of the bilayer thin films is systematically investigated. The BTFMCO/ZN 0.2 FO bilayer exhibits the lowest surface roughness (Ra=1.44 nm), a markedly reduced Fe 2+ concentration and minimized oxygen vacancy density, leading to a suppressed leakage current density of 3.7 × 10 –4 A/cm 2 at 200 kV/cm. Consequently, enhanced multiferroic properties with a ferroelectric remnant polarization (2P r ) of 118.5 µC/cm² and saturation magnetization (M s ) of 63.2 emu/cm³, respectively, are observed in the BTFMCO/ZN 0.2 FO sample. These findings reveal that interfacial modulation via Ni 2+ -doped ZN x FO layers is an effective strategy to simultaneously enhance ferroelectric and ferromagnetic performance.
研究领域:
材料科学
·
凝聚态物理
·
功能薄膜
·
多铁材料
·
磁电耦合
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Nano
·
2022
·
IF 13.364
R. Wang,B. Gou,J. Fu,H. Xu,S. Cheng,J. Zhou,Y. Zhu,J. He,C. Xie,Q. Li
Ferroelectric polymers have been regarded as promising dielectric materials for high volumetric energy density dielectric capacitors due to their high dielectric constant and facile processability. However, ferroelectric dielectric polymers suffer from high intrinsic loss, resulting in low charge-discharge efficiency and insufficient breakdown strength . Here, a sandwich-structured ferroelectric polymer nanocomposite with high energy density is fabricated by sandwiching an array of ultra-small metal particles grown in-situ between two layers of ferroelectric polymers. Due to the unique Coulomb-blockade effect of the ultra-small metal particles, the nanocomposites with suitable distribution density of metal particles exhibit significantly suppressed leakage current density and superior breakdown strength. Compared with Au and Ag, the Pt particle with the highest work function is more effective in improving the capacitive performance of the polymer. In addition, it is revealed that within the theoretical particle size range where the Coulomb-blockade takes effect, the nanocomposite with larger metal particles exhibits better capacitive performance. The optimal composition with an extremely low fraction (0.07 vol%) of 10-nm-size Pt nanoparticles shows a remarkable discharge energy density of 28.6 J/cm 3 and a charge-discharge efficiency of 76%. This method effectively suppresses the energy loss of ferroelectric polymers, and bypasses the dispersion issues in the traditional polymer nanocomposites , providing a new paradigm for fabricating high-energy-density and high-efficiency polymer dielectrics.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14274-14285
·
IF 2.478
Gao Qianqian,Dai Yuqiang,Wei Xile,Zhou Changping,Gong Wenfeng,Song Haixiang,Guo Zhanhu,Li Chengbo
The Aurivillius compound Pb x Bi 6− x Fe 0.5 Co 0.5 Ti 4 O 18 thin films were prepared via chemical solution deposition method and the influence of Pb 2+ ions doping on the structure, ferroelectric and leakage properties were studied. With the increasing concentration of Pb 2+ ions, the lattice distortion is increased and the growth of the films along ab plane is promoted. The calculation results show that the internal stress of the films increases with the increase of Pb 2+ concentration. For the samples with low Pb 2+ doping concentration ( x < 0.6), the leakage current densities are also decreased, which can be attributed to the decrease in oxygen vacancy concentration. Due to the enhanced lattice distortion and decreased leakage current densities, the ferroelectric properties are improved. The film with x = 0.2 has a high saturation polarization of 42.3 µC/cm 2 . According to the fitting results, the leakage conduction mechanism is attributed to the combined effect of space-charge-limited conduction mechanism and ionic conduction mechanisms.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
铁电学
·
薄膜制备
✓ 已验证
DOI
高影响因子
Advanced Physics Research
·
2023
·Vol. 2
·期 11
·2300006
·
IF 0
Shun Lan,Fanqi Meng,Bingbing Yang,Yue Wang,Yiqian Liu,Lvye Dou,Letao Yang,Hao Pan,Xi Kong,Jing Ma,Yang Shen,Ce-Wen Nan,Yuan-Hua Lin
Electrostatic energy storage capacitors based on dielectrics have attracted much attention due to their wide applications in advanced electrical technology and electronic devices. Generally, high energy density is achieved at a high electric field, while conduction loss becomes nonnegligible, which harms practical applications. Here distinctly suppressed leakage current in BaZr 0.5 Ti 0.5 O 3 -based films by entropy engineering is realized. With increased entropy, the leakage current density decreases by two orders of magnitude at the electric field of 3 MV cm −1 , leading to a markedly improved energy efficiency of 87% at an ultrahigh breakdown strength of 8 MV cm −1 in high-entropy films. Thereby, a high energy density of 51.9 J cm −3 is achieved. This work demonstrates the effectiveness of entropy engineering in improving the breakdown strength of dielectric films and shows great potential in enhancing the energy storage performance of capacitors.
研究领域:
材料科学
·
电气工程
·
凝聚态物理
·
纳米技术
✓ 已验证
DOI
Smart Materials and Structures
·
2015
·Vol. 24
·期 7
·075001
·
IF 2.502
Qingsong He,Linlin Song,Min Yu,ZhenDong Dai
We develop an ionic polymer metal-carbon nanotube composite (IPMCC) actuator composed of a multiwalled carbon nanotube (MWCNT)/Nafion membrane sandwiched between two hybrid electrodes, composed of palladium, platinum and MWCNTs. The surface morphology and cross-sectional structure of the metal-carbon nanotube hybrid electrode were observed using scanning electron microscopy (SEM). SEM investigation indicated that the MWCNT layer can adhere very well with the platinum–palladium metal electrode, fill the cracks in the metal surface, and prevent the oxidation of nanoscale platinum particles. These observations show that the surface resistance of the total electrode is retained and the stability of electrode property is maintained. The displacement, blocking force and nonlinear current versus voltage (V–I) characteristics were measured. Compared with an ionic polymer metal composite (IPMC), the IPMCC shows a more stable displacement and blocking force under 1, 1.2 and 2 V at 0.1 Hz, and 2.34–3.29 times higher effective air-operating time under 3 V at 0.1 Hz. It can be observed from the V–I characteristics that the change in shape becomes significant at amplitudes higher than 1.2 V. An equivalent circuit is used to model the nonlinear behavior of the IPMCC, in which the leakage current was taken into account and analyzed. The values of the components in the circuit are estimated and electrical behavior is simulated by using the Pspice software. Compared with the model with no consideration of the leakage current, the simulations obtained by the model considering leakage current showed better agreement with the experimental results. The impressive leakage current (20 mA), which is successfully simulated by the proposed model with the nonlinear circuit, is shown to play an important role in the total current.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-12
·
IF 2.8
Liu Gang,Pu Zining,Xu Limeng,Yao Cheng,Zhang Changhai,Zhang Tiandong,Chi Qingguo
Conventional polymer film capacitors suffer from significant performance degradation at high temperatures due to increased conductivity loss. This study aims to enhance the high-temperature energy storage performance of polyetherimide (PEI) films by constructing a PZT/SiO 2 heterojunction composite dielectric structure. PEI films were prepared by solution casting and then modified by magnetron sputtering to deposit PZT and SiO 2 layers. At 150 °C, the composite films exhibited a high breakdown strength of 636.7 MV/m, a discharged energy density of 4.28 J/cm 3 , and a charge–discharge efficiency exceeding 90%. The PZT/SiO 2 heterojunction effectively inhibited charge injection, reducing leakage current and improving cyclic stability with minimal degradation after 50000 charge–discharge cycles. This scalable method offers a promising approach for developing high-performance polymer-based energy storage materials suitable for high-temperature applications.
研究领域:
材料科学
·
电气工程
·
高分子科学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 3
·2231-2241
·
IF 4.6
Chaozhong Guo,Kamale Tuokedaerhan,Xiangqian Shen,Yerulan Sagidolda,Zhambyl Azamat
In this paper, Gd-doped ZrO2 gate dielectric films and metal-oxide-semiconductor (MOS) capacitors structured as Al/ZrGdOx/Si were prepared using an ultraviolet ozone (UVO)-assisted sol–gel method. The effects of heat treatment temperature on the microstructure, chemical bonding state, optical properties, surface morphology and electrical characteristics of the ZrGdOx composite films and MOS capacitors were systematically investigated. The crystalline phase of the ZrGdOx films appeared only at 600 °C, indicating that Gd doping effectively inhibits the crystallization of ZrO2 films. Meanwhile, as the heat treatment temperature increased from 300 °C to 600 °C, the content of oxygen vacancies decreased from 18.57% to 11.95%, and the content of metal–hydroxyl–oxygen bonds decreased from 14.72% to 8.64%. Heat treatment temperature proved to be effective in passivating the oxygen defects and reducing the trap density within the dielectric layer. At 500 °C, the MOS capacitor exhibited the best electrical characteristics, including the highest dielectric constant (k = 19.3), the smallest hysteresis (ΔVfb = 0.01 V), the lowest boundary trapping oxide charge density (Nbt = 2.7 × 1010 cm−2), and the lowest leakage current density (J = 9.61 × 10−6 A cm−2). Therefore, adjusting the heat treatment temperature can significantly improve the performance of ZrGdOx composite films and capacitors, which is favorable for the application of CMOS devices in large-scale and high-performance electronic systems.
研究领域:
材料科学
·
微电子学
·
介电材料
·
薄膜制备
·
固体物理
·
纳米结构材料
·
表面与界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yan Liu,Jiaqi Yao,Yue Sun
This study investigates the thermal stability and energy efficiency of a three-cell bipolar membrane electrodialysis (BMED) system for treating triethylammonium phosphate spent absorbing liquor, a complicated organic saline wastewater from petrochemical industries. By integrating experimental analysis with Multisim 14.0 circuit simulations, we quantitatively evaluated heat generation patterns in both main and leakage circuits under single-stage (50 mA cm −2 ) and two-stage (50 → 30 mA cm −2 ) operational modes. Results revealed that leakage currents through slots and ducts, though accounting for only 0.15 % of total system current, induced localized Joule heating up to 101.24 mW in narrow slots due to poor heat dissipation. In contrast, the main circuit's rapid solution flow and large contact area enabled efficient heat transfer to external storage tanks, preventing bulk stack overheating. Two-stage BMED significantly suppressed thermal accumulation, reducing peak heating power in acid/base compartments by 33.9–36.2 % and feed compartments by 63.9 % compared to single-stage operation. The segmented current strategy also lowered leakage circuit heat generation by 46.6 %, mitigating risks of membrane degradation and spacer deformation. Furthermore, the study identified that the weak ionization of triethylamine in base compartments exacerbated resistance polarization, while phosphoric acid's high conductivity minimized thermal effects in acid compartments. These findings highlight the critical role of phased current regulation and leakage circuit optimization in scaling BMED for industrial wastewater treatment. Proposed strategies, including spacer geometry redesign and thin compartment fabrication, provide actionable pathways to enhance thermal management and energy efficiency, bridging the gap between laboratory-scale innovations and industrial implementation.
研究领域:
环境工程
·
化学工程
·
电化学
·
膜技术
·
废水处理
·
能源系统
·
工业生态学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Jingjing Tian,Mengen Yan,Ran Xu,Jiayang Zhao,Luodan Wang,Weisong Zhang,Yan Guo,Heng Tian,Yonghao Xu
Polymer-based dielectric capacitors are considered as important energy storage components in the electronic devices and power system owing to their high power density, fast charge–discharge speed, and good reliability. However, the increment of leakage current density at elevated temperature and electric field significantly descends the breakdown strength ( E b ) and energy storage density, restricting their application in harsh environments. Herein, we selected ZnO and SnO 2 n-type semiconductors to construct nn-heterojunction ZnO-SnO 2 nanofibers and introduced them into PEI matrix to fabricate the ZnO-SnO 2 /PEI nanocomposite films via solution casting method. By constructing potential barrier at the interface of ZnO and SnO 2 , charge carrier can be captured and constrained in the potential barrier well during the process of carrier transport, effectively hindering the charge conduction in the nanocomposites, and thus suppressing the leakage current density and boosting the E b and energy storage density. As a consequence, nanocomposite film with 0.50 wt% nanofibers demonstrates high E b of 647 MV/m and large discharge energy density ( U d ) of 8.24J/cm 3 at 25 ℃. Even at 150 ℃, superior U d of 6.02 J/cm 3 , high charge–discharge efficiency ( η ) of 83.5 %, high E b of 593 MV/m are realized in the nanocomposite, which are significantly enhanced than that of pure PEI ( U d ∼ 1.98 J/cm 3 , η ∼ 57.5 %, E b ∼ 438 MV/m). The work provides a novel and feasible strategy for developing high-performance polymer-based dielectric capacitors at elevated temperature.
研究领域:
材料科学
·
高分子物理
·
介电材料
·
能源存储
·
纳米复合材料
·
电子器件
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 5
·2210050
·
IF 19.924
Bin Zhang,Xiao-ming Chen,Zhe Pan,Peng Liu,Minmin Mao,Kaixin Song,Zhu Mao,Rong Sun,Dawei Wang,Shujun Zhang
High-temperature dielectric polymers are in constant demand for the multitude of high-power electronic devices employed in hybrid vehicles, grid-connected photovoltaic and wind power generation, to name a few. There is still a lack, however, of dielectric polymers that can work at high temperature (> 150 °C). Herein, a series of all-organic dielectric polymer composites have been fabricated by blending the n-type molecular semiconductor 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) with polyetherimide (PEI). Electron traps are created by the introduction of trace amounts of n-type small molecule semiconductor NTCDA into PEI, which effectively reduces the leakage current and improves the breakdown strength and energy storage properties of the composite at high temperature. Especially, excellent energy storage performance is achieved in 0.5 vol.% NTCDA/PEI at the high temperatures of 150 and 200 °C, e.g., ultrahigh discharge energy density of 5.1 J cm −3 at 150 °C and 3.2 J cm −3 at 200 °C with high discharge efficiency of 85–90%, which is superior to its state-of-the-art counterparts. This study provides a facile and effective strategy for the design of high-temperature dielectric polymers for advanced electronic and electrical systems.
研究领域:
材料科学
·
电气工程
·
高分子科学
✓ 已验证
DOI
高影响因子
ENGINEERING FAILURE ANALYSIS
·
2020
·
IF 2.897
Basharat Mehmood,Mohammad Akbar,Rahmat Ullah
Silicone rubber (SiR) insulators are considered as promising alternatives to conventional ceramic insulators for high voltage transmission networks. However, aging of SiR insulators is an issue when exposed to combined solar, environmental and electrical stresses. In this study, the effect of micro/nano-silica and micro-alumina trihydrate particles on multi-stress aging performance of silicone rubber with DC voltage was investigated. For this purpose, five types of composites were prepared by reinforcing nano-silica (2–6 wt%) and micro-silica/alumina trihydrate (20 wt%) particles into silicone rubber. These composites were exposed to various stresses combining ultraviolet radiations, humidity, heat and electrical in a specially designed test chamber for a duration of 5000 h. For aging assessment, the SiR composites were characterized by visual inspection, and through measurements of hydrophobicity classification, leakage current, scanning electron microscopy, fourier transform infrared spectroscopy and mechanical testing. Results showed that the composite test sample, S-2 (2 wt% nano-silica and 20 wt% micro-silica) exhibited minor surface roughness, highest hydrophobicity and least reduction in contact angle (16.44°). It also measured the lowest leakage current (3.39 μA), maximum tensile strength (3.43 MPa). The hydrophobic ( CH 3 ) and backbone (Si O Si) groups of the test sample, S-2 also remained intact. The composite filled with 2 wt% nano-silica showed maximum resistance to multi-stress aging due to strong molecular interaction between nano-silica and silicone rubber. The outcome of this study will help electric utilities in finding superior alternates of conventional porcelain insulators for high voltage insulation applications.
研究领域:
材料科学
·
电气工程
·
高分子科学
✓ 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）