Solar RRL
·
2022
·Vol. 7
·期 5
·2200991
·
IF 9.173
Weiwei Sun,Kexiang Wang,Weifeng Liu,Xiaonan Huo,Ran Yin,Yansheng Sun,Yukun Gao,Tingting You,Penggang Yin
Planar n–i–p perovskite solar cells (PSCs) based on a SnO 2 electron transport layer dominate the certified high-efficiency devices. However, the defects located at the SnO 2 /perovskite interface (i.e., buried interface) or inside the perovskite films impede the further improvement of power conversion efficiency (PCE). Herein, nickel acetate (NiAc 2 ) is introduced on buried interface as a bidirectional modifier to improve electron extraction of SnO 2 and the crystal growth of perovskite for the first time. First, NiAc 2 is chemically anchored on SnO 2 to passivate oxygen vacancies, increase conductivity, and optimize the energy level alignment of the buried interface. Second, the porous morphology of PbI 2 film deposited on NiAc 2 -modified SnO 2 endows more sufficient permeation and reaction of organic amine salts (formamidinium iodide [FAI] and methylammonium iodide [MAI]), forming high-quality perovskite film with reduced PbI 2 residues. Meanwhile, NiI 2 and MAAc/FAAc may be produced via in situ reaction between NiAc 2 and organic amine salts, which serve as interface modifier and crystallization regulator to further reduce defects located at the buried interface or inside the perovskite film, respectively. Consequently, an improved PCE of 23.02% for SnO 2 -based PSCs with an ultrahigh open-circuit voltage of 1.17 V is obtained. In addition, long-term storage and light stability of the optimized PSCs are improved.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Yuwei Zhang,Hengxi Zhu,Junjiang Guo,Weizhen Liu,Jiang Qi,Guan Qingqing,Bin Li,Ping Ning
In response to the social goal of ‘carbon peak and carbon neutral’ in the 14th Five-Year Plan of China, this article used Enrofloxacin (ENR), a common antibiotic, as a model compound to study the method of efficiently degrading pharmaceutical sludge and simultaneously producing Formic Acid (FA), hydrogen storage energy, in a sub-supercritical system. The Ni/SnO2 bimetallic catalyst, which was prepared by the equal volume impregnation method, was used for the liquid phase catalysis. As shown by the results, when the reaction temperature was 330°C, and the addition amount of H2O2 was 0.38 mL, the degradation rate of antibiotics could reach 99% after the reaction proceeded for 6 h. In terms of the resource utilization, the yield of FA could reach up to 32.44%. The resource utilization efficiency with Ni/SnO2 catalyst in sub-/supercritical reaction was about 2.5 times higher than that without catalyst. The kinetic reaction model was established to explore the reaction rate of the antibiotic degradation process. In addition, the Ea and the frequency factor of the reaction were 6455 J/mol and 5.78, respectively. As shown by characterization, the prepared Ni/SnO2 bimetallic catalyst had good activity and has already passed repeated stability experiments. In short, this method has broad application prospects in antibiotic catalysis and resource degradation.
研究领域:
环境科学
·
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
·
2023
·
IF 3.2
Chen Xiang,Chen Junjie,Zhang Pengyun,Xiong Jie,Du pingfan,Song Lixin
SnO 2 -based halide perovskite solar cells (PSCs) have recently garnered attention due to their simple and low-temperature fabrication processing. However, the interface defects due to the low temperature process of SnO 2 and imperfect energy band alignment between electron transport layer (ETL) and perovskite layer limit the improvement in efficiency of PSCs. In this study, an amino-acid self-assembled layer was employed onto the SnO 2 ETL as the buffer layer to optimize the interface of the perovskite and SnO 2 ETL. With addition of L-Aspartic acid (L-Asp), the amino molecule interacts with perovskite framework though the strong N–H⋯I hydrogen bonds , and its carboxylic acid groups reacts with SnO 2 by esterification reaction, thus enhancing the interface interaction between SnO 2 and perovskite. The hydrogen bonds and chemical reaction together affect the charge extraction and transfer efficiency at the SnO 2 /perovskite interface in PSCs. As a result, the highest power conversion efficiency (PCE) of PSCs fabricated in air atmosphere was 18.46%. The study unveils the critical role of interface contact modulation of MA-based perovskite and provides an insightful strategy for efficiency and stable low-temperature PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 52
·期 2
·907-916
·
IF 2.047
Shao Mengyao,Hu Bin,Ge Shengyan,Zhou Xingfu
Ti/TiO 2 / SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes modified with three kinds of TiO 2 interlayer materials were fabricated. TiO 2 macroporous membrane (MAc) substrate was prepared by direct calcination, and TiO 2 nanotubes (NTs) and TiO 2 mesoporous membrane (MEs) substrate were fabricated by anodic oxidation under different conditions. The study shows that the TiO 2 -nanotube-based anode reduces crack morphology and provides a larger surface area for loading the electrochemically active materials. TiO 2 -NTs as the optimized interlayer improve the oxygen evolution potential (OEP) from 1.49 to 1.85 V and increase the current density of the oxidation peak from 0.28 to 0.55 mA cm −2 , which enhances the oxidative degradation ability of the electrode. In addition, the service life of the Ti/TiO 2 -NTs/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes is 3.18 times longer than that of the Ti/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes according to accelerated life tests. The degradation rate of methylene blue (MB) wastewater with an initial concentration of 20 mg L −1 reaches 99.14% under 5.0 V within 5 min by using Ti/TiO 2 -NTs/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes, which is 1.67 times more than that of the Ti/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes. Graphical Abstract
Ti/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes modified with three kinds of TiO 2 interlayer have been
fabricated. The service life of the optimized Ti/TiO 2 -NTs/SnO 2 -Sb-IrO 2 /SnO 2 -Sb-Ni electrode is
3.18 times longer than that of the Ti/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes. The degradation rate of
the optimized electrode reaches 99.1 % within 5 min, which is 1.67 times more than that of the
Ti/SnO 2 -Sb-Ir/SnO 2 -Sb-Ni electrodes.
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
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zhen-Kun He,Qiang Sun,Zhongning Shi,Kaiyu Xie,Ali Reza Kamali
Spiky polycrystalline SnO 2 balls assembled from pyramid-shaped SnO 2 nanocrystals with surface oxygen vacancies were synthesized by a simple and facile in-situ molten salt oxidation method using SnCl 2 as the tin source and graphite as the surface reductant. In this method, perfect SnO 2 nanocrystals are first formed on the surface of graphite particles at 500 °C. By increasing the processing temperature to 700 °C, the formation of surface oxygen vacancy defects was confirmed, supported by various characterisation methods including Raman and XPS spectroscopy. A sharp increase in the bulk electrical conductivity of the samples was detected by exceeding the onset temperature corresponding to the formation of oxygen deficient SnO 2 crystals, at which the conductivity of the sample significantly outperformed that of commercial SnO 2 nanoparticles. The formation of oxygen vacancies on SnO 2 crystals is thermodynamically studied, and suggested to occur by surface carbon reduction of the crystals at sufficiently high temperatures. The enhanced electrical conductivity of oxygen deficient SnO 2 crystals can lead to a wider application of tin oxides in advanced electrical applications.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Haiyue Dong,Jilin Wang,Xingyu Li,Weiting Liu,Tian Xia,Disheng Yao,Lixiu Zhang,Chuantian Zuo,Liming Ding,Fei Long
Modification of the charge transport layers is an effective way to improve charge transport and performance of perovskite solar cells (PSCs). The ions in the ionic compounds used for the modification of SnO2 may migrate into the perovskite layer, which harms the stability of PSCs. In this work, a low-cost, water-soluble nonionic polymer polyacrylamide (PAM) is used to modify SnO2. The addition of PAM improves the uniformity, wettability, and electron mobility of the SnO2 film. Through the modification of SnO2, the defects of perovskite films are reduced and the grain size is increased. Furthermore, the energy-level alignment at the SnO2/perovskite interface is improved, which is beneficial to the transfer of electrons from perovskite to SnO2. Finally, the power conversion efficiency (PCE) of PSCs formed from modified SnO2 is enhanced to 22.59%. More importantly, the unencapsulated devices with modified SnO2 retain 90% of the initial value after storage for more than 1000 h under a relative humidity of 50%. These results indicate that modifying SnO2 using PAM is a promising strategy to improve the performance of PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zhixiang Gui,Guodong Li,Dexin Jin,Yinglin Wang,Changhua Wang,Song Yang,Hao Li,Xintong Zhang,Yichun Liu
SnO 2 is considered an ideal electron transport layer (ETL) material for solar cells due to its excellent stability, high transparency, and high electron mobility, however, its performance in near-infrared quantum dots photovoltaics has remained unsatisfactory. This underperformance is mainly linked to generally-used chemical bath deposition (CBD) method of SnO 2 ETLs which is prone to incomplete oxidation of Sn 2+ precursor. The resulting Sn 2+ residues and oxygen vacancy (Ov) induce severe interfacial traps limiting further efficiency gains. In this study, we utilized dielectric barrier discharge technology to generate high-activity oxygen plasma for gas-phase post-treating the CBD-SnO 2 surface. This oxygen plasma reduced the amount of Sn 2+ and Ov by ~20%, which suppressed trap-assisted recombination and collectively reduced interfacial energy band alignment offset. Compared with untreated devices (efficiency: 11.32%), PbS QDSCs with optimized SnO 2 ETL increased carrier lifetime by nearly twofold and enhanced interfacial carrier collection efficiency by 10.7%, significantly raising efficiency to 13.28%. This distinctive gas-phase post-treatment method, which introduces no additional chemicals and leaves no residues, offers a new technical avenue for developing high-performance ETL.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Xinlu Li,Xinlin Zhang,Ronghua Wang,Zelong Su,Junwei Sha,Pengfu Liu
A three-dimensional (3D) interconnected graphene nanoribbons (GNRs) framework wrapping double nanoshells of SnO 2 @TiO 2 was synthesized by a simple but effective method. The nanoshell of TiO 2 anchored on the surface of SnO 2 nanoshell with hollow core to restrict large volume expansion, then GNRs wrapped and interlaced double nanoshells of SnO 2 @TiO 2 to construct a continuous 3D conducting network. The double protection strategy of active electrode materials can make full use of the function of the three components. The enhanced electrochemical performance can be attributed to the structural stability, excellent electronic conductivity and high electrochemical reaction activity.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 5
·3919-3926
·
IF 3.289
Guochen Zhang,Xue Han,Weiwei Bian,Jinhua Zhan,Xicheng Ma
A formaldehyde gas sensor with high sensitivity and superior selectivity has been fabricated successfully with NiO–SnO2 hybrid nanospheres, which consisted of n-type porous SnO2 nanospheres and p-type NiO dopants. It has been characterized by X-ray diffraction (XRD), high-resolution electron microscopy (HRTEM), Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and energy-dispersive X-ray spectroscopy (EDS). Compared with pure SnO2, the NiO-doped SnO2 nanospheres sensor exhibited significantly enhanced formaldehyde-sensing performances, including lower optimum sensing temperature (about 100 °C), lower detectable threshold (0.5 ppm), higher sensitivity (response = 26.03 to 50 ppm HCHO) and superior selectivity. Based on our experimental results, the role of the addition of NiO and a possible sensing mechanism has also been discussed.
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2014
·Vol. 6
·期 6
·1091-1098
·
IF 2.908
Chen Lu-Ya,Zhang Wei-De
Composite photocatalysts based on graphite-like carbon nitride (g-C3N4) and SnO2 nanoparticles were prepared by heating a mixture of SnO2 nanoparticles and melamine in a muffle furnace. The as-synthesized samples were characterized by X-ray
diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible light absorbance spectra, FT-IR and TG analyses. The kinetic constant over an optimized nanocomposite catalyst was 1.37 h–1, which was 4.54 times higher than that over the pristine
g-C3N4 towards the decomposition of rhodamine B under visible light. The significantly higher photocatalytic activity of the composite photocatalysts was attributed to the enhancement of electron–hole separation at the interface between g-C3N4
and SnO2.
研究领域:
材料科学
·
光催化
·
纳米技术
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Jiali He,Jinxia Wu,Shuaishuai Hu,Huanglin Shen,Xin Hu
Hybrid structure optoelectronic devices can bring hope to the design of new-generation functional nanodevices because they can combine hybrid structure nanomaterials with flexible and transparent substrates to maximize device miniaturization and usability. Here, we prepared a highly efficient flexible photodetector based on a SnO 2 /CH 3 NH 3 PbI 3 hybrid structure. The photodetector exhibits a very wide spectral response range and fast response speeds. The response speeds is shorter than 0.4 s under 388 nm laser irradiations at 3 V. Moreover, the device demonstrates surprising flexibility under different bending degrees and excellent mechanical stability after many extreme bending cycles. Hence, the great potential properties of inorganic/perovskite hybrid materials will make it into a promising building block in flexible optoelectronics .
研究领域:
光电子学
·
纳米材料
·
柔性电子学
·
光子学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jinxia Duan,QingWen Yue,Qiu Xiong,Liqian Wang,Linlu Zhu,Kai Zhang,Jun Zhang,Hao Wang
We have demonstrated a two-step wet-chemical route to prepare dense a SnO 2 blocking layer (BL) for boosting efficaciously the optoelectronic performance of mesoporous-TiO 2 based perovskite solar cells (PSCs). Through SnCl 4 water-bath for moderate time, the surface features of SnO 2 BL are availably optimized and recombination loss of the devices is perceptibly suppressed. The influence of bath-time upon the microstructures and photoelectronic properties of SnO 2 BL and photovoltaic characteristics of the corresponding PSCs , has been discussed detailedly. Deep-going explorations on charge dynamics confirm that SnCl 4 bath would facilitate charge transport, hinder charge accumulation and inhibit nonradiative recombination. Upon the basis of surface decoration of SnO 2 , we improve the open-circuit photovoltage from 1.02 V of initial cell to 1.06 V, and achieve a maximum photovoltaic efficiency of 17.14% and null hysteresis. Accordingly, the device with large area (1.0 cm 2 ) based on modified SnO 2 have higher PCE of 14.35% and weaker hysteresis index of 0.019 than its unmodified SnO 2 courtpart.
研究领域:
材料科学
·
光伏技术
·
表面化学
·
纳米材料
·
能源工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）