CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2025
·
IF 3
Cheng Jiahao,Yang Yichen,Wang Lei,Shen Wenjian,Huang Shangwei,Xu Jianlin,Yao Jun,Liang Guijie,Li Bin,Peng Yong,Li Zaifang,Liang Ying,Li Wangnan
Perovskite solar cells (PSCs) have drawn widespread concern for their high efficiency and facile low-temperature solution fabrication, promising for the alternative low-cost photovoltaic energy. However, commercial deployment requires resolution of persistent stability issues and electrical hysteresis effects in PSCs. We demonstrate planar PSCs configuration using a stacked SnO2/TiO2 electron transport layer, which exhibits a cascadealigned energy level, achieving an efficiency of 23.54% with a reduced hysteresis (index: 0.12) and remarkable stability (>90% efficiency retention beyond fifty days at 25% relative humidity without encapsulation). Photoluminescence and electrical characterizations suggest that the performance enhancement is ascribed to the synergetic optimization from suppressing the defective interface and promoting carrier transfer and blocking. More importantly, detailed transient absorption characterization reveals that the use of stacking n-type materials can decrease the hot-carrier cooling dynamics, improve the carrier transfer, and eliminate nonradiative recombination in PSCs. These results suggest that stacking n-type layers could enable superior overall performances compared to common electron transport layers (TiO 2 and SnO 2 ), providing facile routes for fabricating efficient PSCs with high stability.
研究领域:
材料科学
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光伏技术
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纳米科技
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表面科学
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能源化学
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产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2025
·
IF 5
Can Zhang,Hongyan Yin,Sui Mao,Dongyang Li,Hao Jing,Xuelei Cao,Peng Liu,Enze Li,Junwei Nan,Peter Strizhak,Linjun Huang,Jianguo Tang
Photodetectors play a crucial role in the field of optoelectronic communications and other information-related domains. Si as one of the most important materials for visible light detection, has its performance constrained by factors such as its low absorption coefficient, which limits the further enhancement of commercial photodetector performance. In this work, by employing a SnO 2 heterojunction, we have fabricated a MSM structured photodetector with a vertical PN space charge region. The photoelectrons generated in the space charge region can be accelerated onto the SnO 2 surface and achieve sensitive spectral response. By varying the thickness of SnO 2 , the thickness of the space charge layer in the detector is gradiently modulated. Together with the photo-induced potential from KPFM characterization, the key role of the space charge layer thickness is fully confirmed in performance modulation of devices. The device achieves a maximum responsivity of 0.65 A/W and a quantum efficiency of 94.6 %. More notably, the transient response of the device is below 20 ns, demonstrating the application potential of this structure in photodetectors.
研究领域:
半导体物理
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光电子学
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纳米材料
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器件物理
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固体电子学
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2025
·
IF 5.5
Juan Sun,Yihui Zou,Penghui Ren,Peng Wang,Zhiyan Zhu,Can Cui
Perovskite solar cells (PSCs) in an n-i-p structure function well in large part due to the exceptional electrical conductivity and surface morphology of the SnO2-based transport layer (ETL). Here, we report a strategy to enhance the conductivity and tailor the surface morphology of the SnO2 ETL by incorporating molybdic acid (H2MoO4), forming a modified SnO2:H2MoO4 ETL. The incorporation of Mo6+ ions substitutes Sn4+ sites and inhibits the formation of oxygen vacancies (VO), resulting in an upshifted Fermi level and enhanced electron transport efficiency of SnO2. The H+ ions react with surface hydroxyl (−OH) defects through electrostatic interactions, suppressing surface defect generation and reducing nonradiative recombination. In addition, the in situ-formed amorphous MoO3 in the SnO2 matrix contributes to a denser and more uniform ETL. Consequently, the H2MoO4-modified PSCs achieve a champion PCE of 24.27%, marking a notable 9.5% boost compared to the control devices (22.17%), along with significantly enhanced long-term stability.
研究领域:
材料科学
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光伏技术
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纳米技术
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固体物理
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Fangling Zhou,Zhuangzhuang Mu,Gaoliang Chen,Zhenyu Yuan,Renze Zhang,Xin Yan,Fanli Meng
In this study, we successfully constructed a CoSnO₃/SnO₂/Zn₂SnO₄ ternary heterojunction composite, and developed a high-performance isopropanol gas sensor. Experimental results show that the introduction of p-type amorphous CoSnO₃ forms a multi-interface synergistic effect with the SnO₂/Zn₂SnO₄ (n-n heterojunction) substrate, significantly enhancing the gas-sensing performance of the sensor. Specifically, compared with the unmodified SnO₂/Zn₂SnO₄ sensor, the optimal operating temperature of the 0.5 % CoSnO₃/SnO₂/Zn₂SnO₄ sensor was reduced from 380 °C to 320 °C, the lower detection limit was reduced from 1 ppm to 0.5 ppm, and the response value to 100 ppm isopropanol was significantly increased from 40.7 to 490.5, an increase of 12 times. In addition, the sensor exhibits excellent repeatability and long-term stability. The excellent gas-sensing performance of the CoSnO₃/SnO₂/Zn₂SnO₄ sensor prepared in this study mainly stems from its three structural advantages: the effective construction of p–n heterojunctions, abundant surface oxygen vacancies, and the specific adsorption of isopropanol by CoSnO₃. The research team conducted an in-depth and systematic investigation into the gas-sensing mechanism of this composite sensing material.
研究领域:
材料科学
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传感器技术
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纳米材料
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表面化学
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功能材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2021
·Vol. 8
·期 5
·2001466
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IF 16.806
Yali Chen,Xuejiao Zuo,Yiyang He,Fang Qian,Shengnan Zuo,Yalan Zhang,Lei Liang,Zuqin Chen,Kui Zhao,Zhike Liu,Jing Gou,Shengzhong (Frank) Liu
So far, most techniques for modifying perovskite solar cells (PSCs) focus on either the perovskite or electron transport layer (ETL). For the sake of comprehensively improving device performance, a dual-functional method of simultaneously passivating trap defects in both the perovskite and ETL films is proposed that utilizes guidable transfer of Eu 3+ in SnO 2 to perovskite. Europium ions are distributed throughout the SnO 2 film during the formation process of SnO 2 , and they can diffuse directionally through the SnO 2 /perovskite interface into the perovskite, while most of the europium ions remain at the interface. Under the synergistic effect of distributed Eu 3+ in the SnO 2 and aggregated Eu 3+ at the interface, the electron mobilities of ETLs are evidently improved. Meanwhile, diffused Eu 3+ ions passivate the perovskite to reduce trap densities at the grain boundaries, which can dramatically elevate the open-circuit voltage ( V oc ) of PSCs. Finally, the mainly PSCs coated on SnO 2 :Eu 3+ ETL achieve a power conversion efficiency of 20.14%. Moreover, an unsealed device degrades by only 13% after exposure to ambient atmosphere for 84 days.
研究领域:
材料科学
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可再生能源
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光伏技术
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
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2026
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IF 5.8
Xiaoyu Li,Wenqing Zhang,Kang Peng,Zheng Zhou,Yewei Dou,Jianguo Feng
Molybdenum disulfide (MoS 2 ) is promising for aqueous-phase catalytic hydrogenation due to its two-dimensional morphology and abundant catalytic active sites, but limited by poor conductivity and hydrophobicity. Herein, a ternary FK/ATO/MoS 2 composite was fabricated by growing MoS 2 nanosheets on an antimony-doped tin oxide (ATO)-modified hydrophilic kaolinite nanoflakes (FK) via simple coprecipitation-hydrothermal method. Evaluated by the aqueous hydrogenation of 4-nitrophenol (4-NP), the optimal composite with 25% Sb doping in ATO and 50% MoS 2 loading (FK/ATO/MoS 2 –50%) exhibits remarkably enhanced hydrogenation activities as compared to other catalysts, and the reaction rate constant is 0.0809 min −1 , 10 times higher than that of pure MoS 2 (0.0081 min −1 ). The improved performances are due to the synergistic contributions from the exposed active sites of MoS 2 , the conductivity of ATO, the hydrophilicity and dispersion of kaolinite. This work presents an efficient aqueous-phase hydrogenation catalyst and a general design strategy for synergistic “support–mediator–active component” catalytic systems.
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产品关联
DOI
高影响因子
Materials
·
2017
·Vol. 10
·期 5
·535
·
IF 2.654
Min Yin,Fang Yang,Zhaojie Wang,Miao Zhu,Ming Liu,Xiuru Xu,Zhenyu Li
One-dimensional SnO2- and Li+-doped SnO2porous nanofibers were easily fabricated via electrospinning and a subsequent calcination procedure for ultrafast humidity sensing. Different Li dopant concentrations were introduced to investigate the dopant’s role in sensing performance. The response properties were studied under different relative humidity levels by both statistic and dynamic tests. The best response was obtained with respect to the optimal doping of Li+into SnO2porous nanofibers with a maximum 15 times higher response than that of pristine SnO2porous nanofibers, at a relative humidity level of 85%. Most importantly, the ultrafast response and recovery time within 1 s was also obtained with the 1.0 wt % doping of Li+into SnO2porous nanofibers at 5 V and at room temperature, benefiting from the co-contributions of Li-doping and the one-dimensional porous structure. This work provides an effective method of developing ultrafast sensors for practical applications—especially fast breathing sensors.Keywords:humidity sensor;electrospun porous nanofibers;lithium doping;response-recovery behavior
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 50
·期 1
·2459-2466
·
IF 5.2
Xin Liu,Hanmei Zhang,Tao Shen,Jianbo Sun
SnO 2 nanoparticles@Ti 3 C 2 T x MXene have been successfully synthesized by a flexible solvothermal method. The Ti 3 C 2 T x MXene was evenly anchored by the SnO 2 nanoparticles (∼5 nm) through the controllable assembly heterojunction . Ti 3 C 2 T x MXene contributed to the improvement of material conductivity compared to SnO 2 nanoparticles. The combination of SnO 2 @Ti 3 C 2 T x exhibits excellent sensitivity and selectivity to NO 2 at room temperature (RT). Compared with pure Ti 3 C 2 T x MXene, the sensitivity of TCS1.5 nanocomposite increases more than 20 times to 300 ppm NO 2 at RT. In order to explore the sensing mechanism of SnO 2 @Ti 3 C 2 T x nanocomposite to NO 2 , nitrogen adsorption-desorption isotherm technology and DFT calculations were performed. They demonstrated that the high specific surface area, well-proportioned heterogeneous structure of SnO 2 @Ti 3 C 2 T x MXene, and the vital ionic bonds of Sn–N and O–N formed between substrate and NO 2 gas had beneficial effect on improving the gas response capability.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Chenxi Zhang,Xueshuang Deng,Jianfeng Zheng,Xin Zhou,Jianhua Shi,Xiaohong Chen,Zhuo Sun,Sumei Huang
We report a simple and low-cost approach to enhance the longstanding stability of the perovskite solar cell (PSC) through the application of low-temperature grown SnO 2 nanorod (NR) arrays. SnO 2 NR arrays were fabricated by an aqueous synthesis method in the presence of hydrochloric acid and using thin compact SnO 2 as seeds. The influence of HCl concentration on the photovoltaic (PV) performance of the SnO 2 NR array based PSC device was investigated. The formed crystalline SnO 2 nanorods with square transversal-sections were oriented on the FTO facets in a well-defined and perpendicular fashion at an optimal HCl concentration. The optimized width and length for SnO 2 nanorods were 30 nm and 150 nm, respectively. Consequently, efficient and stable SnO 2 nanorod based perovskite devices were obtained with an average power conversion efficiency (PCE) of 16.57%. The SnO 2 nanorod array based PSCs demonstrated considerably better ultraviolet (UV) and ambient air stability than the planar SnO 2 and notably mesoporous TiO 2 solar cells. This paper provides a prospective scheme to grow high-quality three-dimensional SnO 2 nanorod arrays for highly stable and efficient PSCs.
研究领域:
材料科学
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纳米科技
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能源化学
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光伏技术
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半导体器件
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Muhammad Javed Liaqat,Shahid Hussain,Jahirul Islam,Mohammed Mujahid Alam,Rajesh Kumar Manavalan,Xiangzhao Zhang,Junlin Liu,Guanjun Qiao,Guiwu Liu
Preparation of Co 3 O 4 -SnO 2 heterostructures via hydrothermal method. • Peculiar morphology with abundant active sites and wide surface area. • Enhanced gas response (R g /R a ) of 92.8 with excellent sensitivity. • Excellent response is attributed to rapid charge transfer across p-n heterojunction. The recent development of p-n heterojunction sensors has attracted significant interest in gas sensing applications due to their excellent charge transfer, more active sites, and lower operating temperatures. In this research, Co 3 O 4 -SnO 2 heterostructured composite has been developed and investigated as a highly selective sensor for nitrogen dioxide (NO 2 ). The gas sensing results demonstrated a remarkable response of 92.8 to 100 ppm NO 2 at the optimal operating temperature of 200 °C. The sensor was tested over a wide temperature range (50–300 °C), demonstrating exceptional performance, remarkable repeatability, and consistent baseline recovery. The Co 3 O 4 -SnO 2 heterostructure has excellent long-term stability and consistently reliable detection across varying humidity conditions. The sensor's enhanced sensitivity to NO 2 was validated with selectivity tests for other interfering gases. An improved method revealing the NO 2 sensing approach is proposed, supported by density functional theory calculations to investigate the diffusion efficiency of investigated gases at Co 3 O 4 -SnO 2 heterostructures. The results indicated that Co 3 O 4 -SnO 2 heterostructures are an excellent option for practical NO 2 detection under different environmental conditions. Download: Download high-res image (400KB) Download: Download full-size image
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DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Yanbei Wei,Jie Deng,Liping Su,Lanlan Chen,Xin Hu,Huiyao Zhao,Rui Zhou,Jun Qu,Yangdi Chen,Haijin Li,Wenfeng Zhang
In n-i-p perovskite solar cells (PSCs) with tin oxide (SnO2) as the electron transport layer, the SnO2/perovskite interface serves dual functions: facilitating charge extraction and promoting perovskite crystal growth. However, significant nonradiative recombination, energy misalignment, and suboptimal interfacial bonding at the SnO2/perovskite interface result in efficiency loss and compromised stability. In this work, sulfonyl diimidazole (SDI) was introduced as a surface modifier for SnO2. SDI acts as a dual-modifier at the buried interface, binding strongly to both the SnO2 and perovskite layers. SDI effectively passivates SnO2 surface defects, optimizes band arrangement for better interfacial contact, and facilitates perovskite growth. This effectively promotes charge carrier transport, inhibits charge carrier recombination, and alleviates the film strain. The SDI-incorporated device demonstrated an improved power conversion efficiency (PCE) of 23.31%, surpassing the control device’s efficiency of 21.61%, alongside an elevation in fill factor from 77.3% to 81.56%. The optimized device demonstrates a 90% retention of its initial PCE after enduring 1000 h of aging, significantly outlasting the pristine SnO2-based counterpart. Consequently, the modification of interfaces utilizing SDI represents a viable approach to enhance the interface characteristics, elevate the quality of crystallization, and achieve high-performance PSCs.
研究领域:
材料科学
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光伏技术
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太阳能
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界面工程
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2023
·Vol. 37
·期 6
·1180-1184
·
IF 1.6
Song Xuyan,He Yunlu,Peng Sanwen,Wang Bo,Dong Ping,Tang Haolin,Yu Jun
We reported sol-gel-derived Nb-doped SnO 2 which is an effective catalyst carrier for deposition of IrO 2 , and the electrocatalytic activity of the synthesized catalysts for OER was investigated. It is found that the doping of Nb can refine the SnO 2 crystal grains and improve the electrical conductivity of SnO 2 . When the doping amount of Nb is 7%, the electrical conductivity of Nb-SnO 2 reaches a maximum value of 3.54 S/cm. With the increase in the loading amount of IrO 2 , the electrocatalytic activity towards OER of the thus-synthesized catalysts is improved, reaching a comparable OER activity with pristine IrO 2 with the loading content of about 44wt%.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）