Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 7
·4138-4149
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IF 12.732
Jiankai Zhang,Huangzhong Yu
The excessive energy loss (Eloss) mainly resulting from the energetic offsets between different layers and defect state-induced charge trapping and recombination limits the further development of perovskite solar cells (PVSCs). In this work, three solution-processed thiophene-based interlayers were firstly introduced to reduce the Eloss in PVSCs by optimizing the surface electronic states of the SnO2 electron transport layer (ETL) and improving the MAPbI3 film quality. The thiophene-based interlayers improve the conductivity and reduce the work function of SnO2 ETLs, resulting in more efficient electron transportation. Downward band-bending occurs at the SnO2/MAPbI3 interface owing to the permanent dipole moment of these interlayers, which enables more efficient charge carrier extraction and lower Eloss for PVSCs. In addition, the sulfur atoms of the thiophene rings with a lone pair of electrons can bond with the under-coordinated Pb2+ of MAPbI3, thus passivating the ion defect states and reducing the defect state-induced charge carrier trapping and recombination at the SnO2/MAPbI3 interface. These interlayers change the hydrophilicity of the SnO2 surface and promote the formation of high quality MAPbI3 films with larger grain size and fewer grain boundaries, improving the stability of PVSCs. Combining these desirable advantages, the optimized MAPbI3-based PVSCs achieve a highest power conversion efficiency (PCE) of 20.61% with a high open-circuit voltage (VOC) of 1.117 V and fill factor (FF) over 80%, which is higher than that of the pristine PVSCs with a highest PCE of 17.54%. The optimized PVSCs without any encapsulation show higher thermal and humidity stability compared with the pristine PVSCs. Therefore, this work demonstrates an effective way to reduce Eloss, as well as improving both the performance and stability of PVSCs by utilizing thiophene-based interlayers to modify the interface of SnO2/MAPbI3.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Jujun Yuan,Youchen Hao,Xianke Zhang,Xifei Li
CNT@SnO 2 @PPy nanocomposites were designed by combining liquid-phase deposition (LPD) and in-situ chemical-polymerization method for sodium-ion battery anodes. CNT@SnO 2 @PPy nanocomposites maintain one-dimensional structure of CNT in diameters of about 35–45 nm, moreover, the thickness of PPy coating is about 6–8 nm. Sandwiched CNT@SnO 2 @PPy electrode exhibits excellent rate capability and high capacity retention with a reversible capacity of 226 mAh g −1 after 100 cycles at the current density of 100 mA g −1 . The improved electrochemical performance may be assigned to the synergistic effects among CNT, SnO 2 , and PPy . It may enhance electrical conductivity, avoid the pulverization of electrode material, and prevent the aggregation of Sn during the charge/discharge processes.
研究领域:
材料科学
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储能
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纳米技术
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电化学
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DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Linsong Wu,Haoran Shi,Xingzhi Wang,Shiwei Lu,Xiang Chen
In this study, a series of nano-TiO2 composite materials, including nano-TiO2, nano-SnO2/TiO2, nano-SiO2/TiO2, and nano-Fe2O3/TiO2, were successfully synthesized via the gaseous detonation method. Comprehensive characterization of the synthesized samples was carried out through X-ray diffraction (XRD), transmission electron microscopy/high-resolution TEM (TEM/HRTEM), scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Brunauer–Emmett–Teller (BET) method, and Fourier transform infrared (FTIR) analysis, which unveiled the significant influence of precursor types on the microstructure of the composite materials. Specifically, the incorporation of Sn4+ promoted the transformation of TiO2 to the rutile phase, reducing particle sizes from 25 to 19 nm and increasing the specific surface area from 44 to 86 m2/g. In contrast, the introduction of SiO2 impeded the rutile phase formation, leading to a marked reduction in particle size to 14 nm and an enhancement of the specific surface area to 104 m2/g. Furthermore, the presence of Fe3+ promoted the formation of the rutile phase and enabled particle growth to 44 nm. These findings not only deepen the understanding of structural control in the synthesis of nano-TiO2 composite materials via the gaseous detonation method but also highlight the critical role of precursor selection in determining the properties of the resulting materials.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 43
·20422-20428
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IF 2.562
Shendong Zhuang,Xiaoyong Xu,Yaru Pang,Jingguo Hu,Chi Yang,Ling Tong,Yuxue Zhou
The ultrafine SnO2 quantum dots (QDs) modified with poly(ethylene glycol methyl ether) (PEGME) (PEGME–SnO2 QDs) were synthesized via hydrothermal method. X-ray diffraction and high-resolution transmission electron microscopy were employed to illustrate that the PEGME–SnO2 QDs are uniform, monodispersed and about 4 nm in diameter. Then infrared spectrum and thermogravimetric analysis were used to prove that PEGME groups are bound tightly to SnO2 surfaces. The as-synthesized PEGME–SnO2 QDs excellently achieved photocatalytic degradation to Rhodamine B dye (RhB). The photon efficiency of the PEGME–SnO2 QDs catalyst and corresponding RhB dye degradation rate constant could reach 0.0058% and 9.98 × 10−2 min−1, respectively. This outstanding photocatalytic performance could be attributed to not only large surface-to-volume ratio and high crystallinity of the ultrafine and monodispersed QDs, but also good hydrophilicity and conductivity of the PEGME surface modifier. Remarkably, such PEGME–SnO2 QDs with outstanding photocatalytic efficiency and stable recyclability are promising to be applied to environmental purification.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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表面化学
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DOI
高影响因子
RARE METAL MATERIALS AND ENGINEERING
·
2016
·Vol. 45
·期 7
·1664-1668
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IF 0.236
Zhang Lingjie,Shen Tao,Shen Qianhong,Zhang Ji,Chen Lawson,Fan Xianping,Yang Hui
La 2 Sn 2 O 7 /SnO 2 composite powder was synthesized by chemical co-precipitation, and Ag-La 2 Sn 2 O 7 /SnO 2 electrical contact material was prepared by a powder metallurgy method. Anti-arc erosion properties, mass loss and Vickers hardness of the Ag-La 2 Sn 2 O 7 /SnO 2 composite were investigated, and its anti-arc erosion mechanism was discussed. Results show that the welding force of Ag-La 2 Sn 2 O 7 /SnO 2 composite is much better than that of Ag-SnO 2 , because the new phase La 2 Sn 2 O 7 can increase the viscosity of melt pool and improve wettability between silver and tin oxide to some extent. Meanwhile, Flatter arcing area and “beads-like” particles embedded scatteredly in the surface could decentralize arc energy via “pinning effect”, which decreases temperature rise and weakens the damage of surface structure, and better anti-welding property is obtained. Ag-La 2 Sn 2 O 7 /SnO 2 composite could be a leading candidate material for electrical contacts in the future.
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DOI
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Huiyan Ma,Chuanya Li,Jie Yin,Xipeng Pu,Dafeng Zhang,Changhua Su,Xiaoqing Wang,Xin Shao
Polyoxometalate-doped polyaniline/SnO 2 (polyoxometalate=H 4 SiW 12 O 40 , abbreviated as SiW 12 , polyaniline , abbreviated as PANI) nanosphere composites were obtained by a two-step synthesis using SnO 2 as template. The structure and properties of the products were characterized. Results revealed that SiW 12 concentration significantly controlled the covered state and dispersion of resultant ternary nanocomposites. Using ethanol solvent instead of water with SiW 12 also promoted aniline polymerization on the SnO 2 surface. The composites exhibited enhanced dispersion, coverage, and photocatalytic performance for Rhodamine B (RhB) degradation. Moreover, the mass ratio of SiW 12 :aniline:SnO 2 was ca. 6:1:1, indicating enhanced photocatalytic activity compared with that of the monocomponent SnO 2 or HCl-doped PANI/SnO 2 composites.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Ruilong Ma,Fan Wu,Jiaxin Yue,Wenlong Zhao,Jia Yan,Hao Cui,Peter Feng,Xiaoyan Peng
The leakage of HCHO gas has direct and irreversible damage on both human health and the environment. However, the current commercial electronic nose (E-nose) has low accuracy in predicting the concentration of HCHO. In this work, a sensor array consisting of 6 gas sensors was fabricated and combined with advanced deep learning algorithms to achieve accurate prediction of HCHO concentration. High-performance SnO 2 sensing material with high specific surface area was synthesized by applying the Metal-Organic Frameworks (MOFs) sacrificial template, and the response of the SnO 2 gas sensor was as high as 15.098, which is much higher than that of commonly used commercial sensors. In addition, the sensing performance of the SnO 2 sensor, including response, selectivity and repeatability etc., were investigated. Afterward, a Formaldehyde Prediction Network (FPNet) model was proposed for processing the HCHO gas dataset and cosine annealing was added to gradually reduce the learning rate during training to help the model converge to the optimal solution. Furthermore, the residual structures with different number of layers were compared, and the 3-layer residual structure expressed the most accurate results of concentration prediction of the HCHO gas, with an MSE of 9.003, MAPE of 0.015, and R 2 of 0.998. This study provides a new idea from sensor preparation to pattern recognition algorithm research, effectively solving the problems of the low response of commercial sensors to HCHO and the low accuracy of pattern recognition algorithms for E-nose datasets.
研究领域:
传感技术
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深度学习
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
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2022
·
IF 3.868
Minna Hou,Ya Wang,Meidouxue Han,Huizhi Ren,Rongbo Wang,Juntao Zhao,Qian Huang,Yi Ding,Xiaodan Zhang,Guofu Hou,Ying Zhao
For planar n-i-p device, SnO 2 /perovskite interface, which not only governs the electron extraction and transport, but affects perovskite formation, takes fundamental role to achieve perovskite solar cells (PCSs) with high performance in the context of commercializing courses. KCl treatment is one of the most effective and widely accepted strategy to optimize SnO 2 /perovskite interface. Whereas the role of KCl draws tremendous controversy, and needs further investigation. Thereby, we systematically investigated the influence of KCl treatment on optoelectronic properties of SnO 2 and perovskite film, and the photovoltaic performance of PSCs. It is demonstrated that KCl treatment can suppress hydroxyl on SnO 2 surface and improve charge extraction. In addition, KCl treatment can promote perovskite crystallization. Due to the well matched lattice constants of KCl and α-FAPbI 3 , we proposed that KCl may serve as seed crystal to guide FAPbI 3 formation, while Cl further promotes perovskite crystal growth. Consequently, the solar cell based on SnO 2 /KCl exhibited promoted photovoltaic performance with efficiency increased from 19.51% to 20.65%, and improved thermal stability in ambient condition. Meanwhile, benefiting from the capability of promoting α-FAPbI 3 crystallization of KCl treatment, MA-free device based on SnO 2 /KCl achieved increased efficiency from 19.03% to 20.42%.
研究领域:
材料科学
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太阳能电池技术
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产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2022
·Vol. 16
·期 4
·1-9
·
IF 2.612
Zhu Chaoqi,Li Xiang,Wang Xiaoxia,Su Huiyu,Ma Chaofan,Guo Xiang,Xie Changsheng,Zeng Dawen
Efficient chemical warfare agents (CWAs) detection is required to protect people from the CWAs in war and terrorism. In this work, a Pd-doped SnO 2 nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl salicylate. The sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.% Pd-doped SnO 2 exhibited a significant improvement in the detection of methyl salicylate at the ppb (1 ppb = 10 −9 ) level, and the response value to 160 ppb methyl salicylate is 0.72 at 250 °C. Compared with the pure SnO 2 , the response value is increased by 4.5 times, which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic effect. In addition, the 0.5 at.% Pd-doped SnO 2 sensor still has an obvious response to 16 ppb methyl salicylate with a response value of 0.13, indicating the lower detection limit of the sensor.
研究领域:
材料科学
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化学传感器
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纳米技术
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环境监测
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Haoming Sun,Jing Yang,Jiaxin Li,Yuxia Shan,Ling Leng,Rong Chen,Xinjiang Zhu,Cheng-Te Lin,Minghui Yang
Non-contact humidity sensing shows great promise for respiratory monitoring, offering a non-invasive pathway to assess physiological health. However, the translation of existing humidity sensors into practical applications is limited by slow response, poor selectivity, and susceptibility to environmental interference. Here, we report a co-doping strategy in which La, Sr, and Mn were incorporated into SnO 2 using La 0.7 Sr 0.3 MnO 3 (LSMO) precursors using a hydrothermal route. The SnO 2 -10LSMO based sensor exhibited superior performance, including an ultrahigh response (∼80,000), fast and repeatable dynamics, and excellent resistance to interference. Compared with nitrate-doped counterparts, the performance enhancement is attributed to the uniform distribution of dopant ions and optimized electronic structure. Importantly, real-time breath analysis demonstrated the ability to distinguish different breathing frequencies, enabling a portable platform for exercise intensity monitoring.
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产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 8
·期 5
·2101049
·
IF 7.295
Zhilong Song,Zhixiang Hu,Jingyao Liu,Jia Yan,Huaming Li,Jianjun Jiang,Jiang Tang,Huan Liu
Doping is fundamental to controlling the properties of bulk semiconductors. Although the antimony (Sb V )-doping strategy is widely employed in the design of practical tin oxide (SnO 2 ) semiconductor gas sensors for higher signal-to-noise ratio, challenges remain to dope semiconductor nanocrystals since the diffusion of impurity atoms may be far from realized at the synthesis temperatures used. Herein, a metastable Sb-doping strategy is proposed to overcome the serious receptor-versus-transducer mismatch in SnO 2 quantum wires (QWs). The solvothermal synthesis of colloidal Sb III -doped SnO 2 QWs has been conducted at 180 °C, whereby the antimony amount is varied to optimize the structural and morphological properties for higher surface activity and electrical conductivity. A unique n-type doping mechanism arising from the stable presence of Sb III on SnO 2 (101) facets via Sn II -O-Sb III is demonstrated. Further, the use of sensitive (down to 4 ppb, the lowest detection limit ever reported), fast (response and recovery time of 43 s and 96 s toward 10 ppm of H 2 S) gas sensors for H 2 S detection at near room temperature (40 °C) is showcased. The metastable Sb-doping strategy may pave the way to ultrasensitive gas sensor possessing low power consumption and excellent integration compatibility to satisfy the increasing demand for ubiquitous and reliable gas detection.
研究领域:
材料科学
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纳米技术
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半导体物理
·
气体传感技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2020
·Vol. 67
·期 8
·1431-1436
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IF 1.554
Hsiang-Ning Luk,Tsai-Hsuan Dai,Ren-Jang Wu,Murthy Chavali
This proposed Pt@SnO 2 core-shell nanocomposite material based electrochemical sensor towards epinephrine detection showed high sensitivity, repeatability and high stability. It can play a significant role for precision determination of epinephrine in the drug sample and can also used for either simultaneous determination or others like acetaminophen (AC) and dopamine (DA) in samples.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）