OPTICS LETTERS
·
2024
·Vol. 49
·期 8
·1896-1899
·
IF 3.1
Jinxing Zhao,Zhongwei Man,Zhongwei Man,Shuaibing Wang,Chaoqi Hao,Zhenzhen Yu,Xu Li,Xu Li,Aiwei Tang
Next-generation display and lighting based on quantum dot light-emitting diodes (QLEDs) require a balanced electron injection of electron transport layers (ETLs). However, classical ZnO nanoparticles (NPs) as ETLs face inherent defects such as excessive electron injection and positive aging effects, urgently requiring the development of new types of ETL materials. Here, we show that high stability SnO2 NPs as ETL can significantly improve the QLED performance to 100567 cd·m−2 luminance, 14.3% maximum external quantum efficiency, and 13.1 cd·A−1 maximum current efficiency using traditional device structures after optimizing the film thickness and annealing the temperature. Furthermore, experimental tests reveal that by doping Zr4+ ions, the size of SnO2 NPs will reduce, dispersion will improve, and energy level will shift up. As expected, when using Zr-SnO2 NPs as the ETL, the maximum external quantum efficiency can reach 16.6%, which is close to the state-of-the-art QLEDs based on ZnO ETL. This work opens the door for developing novel, to the best of our knowledge, type ETLs for QLEDs.
研究领域:
材料科学
·
光电显示技术
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DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 4
·E69
·
IF 3.12
Li Xu,Ye Wang,Qiutong Xu,Huiying Duan
Ti/SnO2-Sb-Fe electrodes have been prepared by a novel precipitation printing method, the traditional sol-gel method, and the direct current deposition method. The microstructure of the electrodes was systematically characterized through X-ray diffraction (XRD) observation and high-resolution transmission electron microscopy (HRTEM) verification. In addition, the morphology was characterized by scanning electron microscopy (SEM), while the electrochemical properties and the stability were further investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and accelerated life testing. The results indicate that the Ti/SnO2-Sb-Fe electrode prepared by precipitation printing has the smallest nanoparticle structure (< 10 nm), a higher electrochemical porosity (49.6%), and a higher oxygen evolution potential (2.20 V). As a comparison, the Ti/SnO2-Sb-Fe electrode prepared by the sol-gel method has the longest service life. To further evaluate the electrocatalytic activity of the Ti/SnO2-Sb-Fe electrodes, Acid Red 73 was employed as simulated sewage for electrochemical degradation. After 180 min, the removal efficiency of AR 73 reached 86.8%, 63.4%, and 74%, respectively, for Ti/SnO2-Sb-Fe electrodes prepared by precipitation printing method, traditional sol-gel method, and direct current deposition method. Furthermore, the degradation of AR 73 followed pseudo-first-order kinetics.
研究领域:
材料科学
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电化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 32
·5355-5362
·
IF 3.117
Jianing Tan,Song Jiang,Binghui Ge,Bojia Xu,Baobao Cao
SnO2(ZnO:Sn)m is a new phase recently found in the diagram of a ZnO–SnO2 binary system in the form of a one-dimensional nanowire, which is a new group of superlattice oxide besides the widely known M2O3(ZnO)m (M = trivalent elements, such as In, Ga, and Al, and m = integer). Thereafter, more comprehensive structural and physical properties of SnO2(ZnO:Sn)m are still quite lacking due to the difficulties in high purity synthesis. In this study, we demonstrate a rational design for the growth of SnO2(ZnO:Sn)m superlattice nanowire arrays using a home-built double-tube chemical vapor deposition (CVD) system for the first time. The atomic microstructure of the nanowire array was investigated by Cs-corrected scanning transmission electron microscopy (STEM), and a phenomenon of unsaturated Sn occupation in Sn–O octahedral layers was observed. Two new vibrational modes at 276 cm−1 and 698 cm−1 were found in Raman measurement. The photoluminescence (PL) spectrum of SnO2(ZnO:Sn)m superlattice nanowires displays an interesting broad-spectrum emission in the range of around 380–570 nm. Kelvin probe force microscopy reveals that the average work function of SnO2(ZnO:Sn)m nanowires is in the range of 4.05–4.32 eV.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Kelin Hu,Feipeng Wang,Zijia Shen,Hongcheng Liu,Wen Zeng,Yu Wang
In this study, ZnO–SnO 2 heterojunction nanofibers were fabricated using electrospinning and treated by Ar plasma. The post treatment demonstrated the ability to regulate adsorbed oxygen of nanofibers and thus affecting the gas sensing performance. The results revealed that the gas sensing performances increased with the increase of plasma treatment time at first, then showed a downward trend. The setting for the best H 2 gas performance was 20 min of plasma treatment, under which the response of the sample was 80% higher and the response time was two thirds shorter than those of the untreated sample. The explanation can be that appropriate plasma treatment can increase the oxygen vacancy on the surface of heterojunction nanofibers as well as the resistance modulation range in the air; however, excessive plasma treatment can result in the reduction of the resistance modulation range in the air by reducing the metal oxide to metal.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2015
·
IF 1.227
Z. L. Zhang,M. L. Wang,Y. L. Mao
In this paper, heterojunction semiconductors of Sb-SnO2/TiO2 were prepared with varying molar ratios of Sb-SnO2 to TiO2. The separation efficiency of the photogenerated carriers was characterised by the surface photovoltage (SPV) technique, and the trap density was measured by an electrochemical method. The trap density was measured to be 7·48×1016, 6·01×1016, 5·43×1016, and 6·61×1016 cm−2 for TiO2 and Sb-SnO2/TiO2 films with molar ratios of 1, 2, and 3%, respectively. The SPV enhancement was estimated to be 1, 1·36, 7·64, and 6·36 for TiO2 and Sb-SnO2/TiO2 films with molar ratios of 1, 2, and 3%, respectively. The results indicate that SPV enhancement increases with decreasing trap density, which demonstrates that the trap density is an important factor affecting the separation efficiency of photogenerated carriers in heterojunction semiconductors.
研究领域:
材料科学
·
半导体物理
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Hanyang Li,Yuexin Xu,Ning Lv,Qiuyitong Zhang,Xiaolian Zhang,Zijie Wei,Yadong Wang,Haolin Tang,Hongfei Pan
The development of polymer electrolyte membrane electrolysis of water is mainly limited by the high cost of noble metals and inadequate stability owing to the slow reaction kinetics of the oxygen evolution reaction and the restrictions of strongly acidic operating environments. To improve the utilization of noble metals, we use Ti-doped SnO2 as a carrier to support active species IrO2. The results show that the introduction of Ti element can inhibit the grain growth and help to improve the electrical conductivity of SnO2. Electrochemical tests for the catalysts show that 40 wt % IrO2/TSO has the best mass-normalized charge (231.24 C g–1 IrO2) and current density (714.85 A g–1 IrO2) at 1.6 V with the overpotential of only 271 mV at 10 mA cm–2, which is attributed to the outstanding dispersion effect of Ti-doped SnO2 and the synergy between the active species and the introduction of Ti element. The comprehensive advantages exhibited by the Ti-doped SnO2 support provide an alternative solution to reduce the cost of noble metal catalysts by improving the catalytic activity and stability.
研究领域:
电化学
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Teng-Long Zhou,En-Kang Wu,Jia-Kang Wu,Tian Qiang,Xiao-Feng Gu,Ming-Yang Yan,Svetlana von Gratowski,Jun-Ge Liang
Traditional microwave gas sensors have been widely used for gas detection at room temperature due to the advantages of high sensitivity and multi-parameter detection. However, the detection results can be significantly affected by the change of humidity, which restricts their application in practical environments. To solve this problem, a microwave gas sensor based on SnO 2 /Co 3 O 4 composite nanofibers, a micro-heater and a dual-mode resonator was proposed, achieving high-precision measurement of acetone within the range of 10~500 ppm. The integration of micro-heater can reduce water molecule adsorption, leading to enhanced sensing stability under varying humidity levels. The results demonstrate that the construction of SnO 2 /Co 3 O 4 heterostructures can enhance the sensitivity due to increasing charge transfer capability. The maximum sensitivity reached 3.938 mdB/ppm at the optimal operating temperature of 150 ℃, which is approximately five times higher than that of room temperature conditions. Moreover, the sensitivity of the microwave gas sensor maintains almost unchanged under different humidity, which can be attributed to the integration of micro-heater. This work provides a novel strategy for the design of microwave gas sensors in practical environments.
研究领域:
材料科学
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传感技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 60
·37806-37814
·
IF 3.108
Anlin Xu,Xiang Dai,Kajia Wei,Weiqing Han,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Lianjun Wang
The broad application of highly electrocatalytic SnO2–Sb electrodes for wastewater treatment is limited by their short service lifetime. Herein, a novel substrate structure, tubular porous titanium, was applied to prepare a TiO2-NT/SnO2–Sb electrode, which could greatly improve the stability of the electrode for electrochemical oxidation process. Based on the analysis conducted using a field emission scanning electron microscope (FE-SEM), linked with an energy dispersive spectrometer (EDS), it was demonstrated that a solid solution between Sn and Sb presented a smooth surface of the tubular porous electrode. The crystalline structure and chemical composition of the electrode coating are determined by X-ray diffraction (XRD). Accelerated service life test reveals that under the 0.2 A cm−2 current density in a 0.5 M H2SO4 solution, the TiO2-NT/SnO2–Sb tubular porous electrode has the longest accelerated service lifetime of 68.9 h, which is 10.9 times that of the TiO2-NT/SnO2–Sb plate electrode. Cyclic voltammetry curves (CVs) and linear sweep voltammetry curves (LSVs) reveal the enhanced electroactive surface area and higher oxygen evolution potential (OEP = 1.85 V vs. Ag/AgCl) of the electrode. Moreover, the TiO2-NT/SnO2–Sb tubular porous electrode has the larger outer voltammetric charge q*. During the electrochemical oxidation of pyrimidine, the tubular system constructed using the TiO2-NT/SnO2–Sb tubular porous electrode as the anode also exhibited best electrocatalytic performance, and 97.9% pyridimine removal efficiency and 79.4% COD removal efficiency at 6 h were achieved.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
AATCC Journal of Research
·
2024
·
IF 0.6
Jun Xu,Yuhang Wen,Qiqi Chang,Tianxu Hao,Tianhong He,Jian Zhang,Lei He,Chenxu Zhang,Yuanjun Liu
SnO2 is a wide-band gap N-type semiconductor material with a higher electron transfer rate than TiO2. Therefore, SnO2 has broad application prospects in the photoanode composite materials of dye-sensitized solar cells (DSSC). In this study, SnO2–TiO2 composite nanofibers with different molar ratios (5%, 10%, 15%, and 20%) were prepared by double-needle electrospinning technology, and the nanofibers were characterized after adjusting the solution composition. Different molar ratios of TiO2 and SnO2–TiO2 composite nanofiber photoanodes were fabricated by spin-coating, and the adsorption behavior of dyes on the photoanodes was investigated. Moreover, the electrochemical impedance of the photoanodes and DSSC and their photoelectric performance were also tested. The experimental results showed that SnO2–TiO2 composite nanofibers with a molar ratio of 10% exhibited excellent properties, including a peak specific surface area of 93.01 m2/g, strong dye adsorption capacity, small interfacial resistance, and fast electron transfer rate. These outstanding properties significantly promoted the generation of photoelectrons and improved the photoelectric conversion efficiency of DSSC. Compared with single-component TiO2, the photoelectric conversion efficiency of SnO2–TiO2 nanofiber photoanode composite material improved by 85.65%.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 9
·092505
·
IF 3.9
Shuna Liu,Ben Yang,Anran Zuo,Yongming Tang
Ti/SnO2-Sb/PbO2 anodes were electrodeposited from methanesulfonate-based baths, and the effect of dopants such as PVP and Fe on the surface morphology, phase composition, electrocatalytic activity and stability was investigated. It is revealed that the inclusion of Fe effectively enhances the stability of PbO2 anode, while PVP can significantly improve its electrocatalytic activity. The Fe,PVP-codoped anode, Ti/SnO2-Sb/Fe-PVP-PbO2, exhibits the higher stability and electrocatalytic activity compared to the respective inclusion of Fe and PVP. The gradation efficiency of methyl orange (MO) on the Ti/SnO2-Sb/Fe-PVP-PbO2 anode is affected by the applied current density and the initial MO concentration. During degradation, the azo structure of MO is firstly cleaved, resulting in the rapid decolorization of solution. Demethylated MO and the anion of sulfanilic acid are detected as intermediates, and thus a plausible pathway of MO degradation is proposed.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 9
·2102474
·
IF 6.389
Yu Dong,Yueheng Qi,Wenqing Zhao,Shaohui Yuan,Zihao Zeng,Yue Yang,Wei Sun,Peng Ge
As potential candidates, metal sulfides display strong storage abilities but suffer from serious volume swelling and polysulfide shuttling. Especially rich-sulfur materials, inferior reversible conversion reactions (from MS 2 to MS with S) can bring about major formation of sulfur. Herein, cubic-like Sn–Co–S materials with SnO 2 as catalyst are designed with various dimensional carbon. The as-resulted samples display uniform distributed particle size (≈5 µm), while cross-linked Sn–Co–S@carbon is successfully formed due to its rich surficial groups. Significantly, the formation of chemical bonds about Sn/Co–S–C is noted, facilitating ions/e-transfering and architecture enhancing. Meanwhile, owing to the endothermic effect of carbon, SnO 2 finally resulted, effectively limiting the so-called “shuttling effect” of polysulfide. Utilized as sodium-ion anodes, the optimized samples can deliver a capacity of 490 mAh g −1 at 0.5 A g −1 and ≈400 mAh g −1 above at 5.0 A g −1 . Assisted by the detailed kinetic analysis, it can be confirmed that the improvements of surface-controlling behaviors mainly come from the interfacial chemical bonds and strong-polar metal-oxides bonds. This work is expected to illustrate the roles of interfacial design and metal oxide catalysts for advanced energy storage materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 26
·14333-14344
·
IF 11.9
Yuejuan Zhang,Penghui Chen,Mingming Li,Shaoqing Li,Ying Yue,Yanchun Wang,Sishen Xie,Weiya Zhou
Aqueous Zn-ion batteries (AZIBs) are attractive for next-generation renewable and secure energy storage systems due to their high safety and low cost. However, dendrite growth and side reactions of Zn metal anodes severely limit their practical applications. Moreover, polarization is an important but easily overlooked factor hampering the development of AZIBs. Herein, a zincophilic, hydrophilic, and thin (∼100 nm) SnO2 protective layer is reported to remodel the Zn anode/electrolyte interface via a simple spin-coating approach. The SnO2 layer effectively inhibits the growth of the dendrites, which prolongs the lifetime of Zn anodes to 3900 h. It also alleviates the side reactions and endows Zn‖Cu cells with a high Coulombic efficiency of 99.3% over 2000 cycles. Meanwhile, the SnO2 layer presents fast Zn deposition kinetics to ensure reversible Zn anodes at high current/capacity by decreasing electrochemical polarization and concentration polarization. Consequently, SnO2/Zn anodes exhibit a high cumulative capacity of 4.5 A h cm−2 at an ultrahigh current of 30 mA cm−2 with a low overpotential of 90 mV and even 3.2 A h cm−2 at a high capacity of 4 mA h cm−2 and high current of 8 mA cm−2. Prototype SnO2/Zn‖δ-MnO2 full cells also obtain higher capacities and capacity retention (96.9% after 500 cycles at 2C) than bare Zn. This work offers new insights for ensuring the reversibility and durability of Zn anodes with low polarization at high current/capacity and provides a promising way to promote the practical application of AZIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）