Journal of Materials Chemistry C
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2024
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IF 5.7
Gangyi Zeng,Guangyao Liu,Tiantian Wang,Lingling Wen,Jiangning Li,Yan Meng,Ziqiu Ren,Xin Li
Triple-cation CsFAMA perovskite solar cells (PSCs) have gained great attention because of their excellent stability. Buried interface management is one of the most effective methods to further improve device performance; however, such a strategy has not been extensively studied in air-processed triple-cation PSCs. Herein, we report an effective management strategy that incorporates ionic liquids (ILs) of 1-butyl-3-methylimidazole hexafluorophosphate (BMIMPF6) to modify the buried interface. The synergistic effect of BMIMPF6 is revealed by employing several characterization methods, including time-of-flight secondary ion mass spectrometry and inductively coupled plasma mass spectrometry. It was found that BMIMPF6 can significantly coordinate with Sn4+ and fill the oxygen vacancy defects from one side of the electron transport layer, and simultaneously bond with uncoordinated Pb2+ from the other side of the perovskite layer, leading to reduced nonradiative recombination losses and enhanced carrier extraction. More importantly, such an IL “bridge” enabled BMIMPF6 to exist at the buried interface, which avoids damage to the passivating layer in the next spin-coating process for achieving the perovskite film. Moreover, BMIMPF6 also penetrates the perovskite film and regulates the crystallinity of perovskite. As a result, the BMIMPF6-modified device fabricated in ambient air without glove boxes or dry rooms delivers a champion power conversion efficiency (PCE) of 21.74%. The unencapsulated device maintains 77.5% of its initial PCE after being stored in ambient air for more than 3500 h. Additionally, the lead leakage rate from the perovskite film is reduced. This work provides a facile and low-cost method to fabricate high-performance all-air-processed PSCs.
研究领域:
材料科学
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能源技术
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光伏器件
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
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IF 8.198
Tingting Zhong,Lei Shi,Huiying Hao,Jingjing Dong,Kunpeng Tang,Xiang Xu,Shindume Lomboleni Hamukwaya,Hao Liu,Jie Xing
In order to further promote the commercial application of perovskite solar cells (PSCs), it is particularly important to fabricate devices in the ambient air condition. Herein, we explore a simple method to reproduce high-efficiency and stable PSCs using the one-step anti-solvent deposition conducted in the full ambient air. NH4Ac (ammonium acetate), which is green and environmentally friendly, is first introduced into an anti-solvent (ethyl acetate) to enhance the photovoltaic performance and stability of devices. NH4+ causes the intermediate phase to undergo a process of cation exchange, thereby delaying crystallization. Ac– makes the additive and A-site cation form hydrogen bonds, which in turn makes the intermediate phase more stable. The dual effects of NH4+ and Ac– delay the crystallization of the perovskite film, reduce the density of defect states, and decrease the non-radiative recombination of carriers. By optimizing the concentration of NH4Ac, a champion power conversion efficiency (PCE) of 20.41% and an average PCE of 19.46 ± 0.64% are achieved, which is currently one of the highest efficiencies in fabricating PSCs under the full ambient air condition. Furthermore, the corresponding PSCs without encapsulation can maintain 82% of its initial PCE when stored in full ambient air condition (30–40% RH) for 30 days.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
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2020
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IF 3.687
Yang Liu,Wei Gao,Hao Zhou,Xianliang Yi,Yongming Bao
Aiming at a simple and effective way to activate the recycled cathode materials from spent Li-ion batteries for air cleaning, LiCoO 2 was synthesized and treated by water for airborne benzene removal. Compared with the pristine sample, whose benzene conversion was ∼20 % at 400 °C, the water-treated one could fulfill 100 % of conversion for 431 ppm of benzene at 300 °C under 120 L g −1 h −1 of space velocity. Furthermore, the water treatment process also worked effectively with the commercialized LiCoO 2 . Characterization results showed that surface oxygen, i.e. , chemically adsorbed oxygen and surficial lattice oxygen, only acted as benzene adsorption sites inert towards benzene oxidation whereas bulk lattice oxygen was reactive for oxidation reaction. Water treatment played two roles in updating the LiCoO 2 surface properties. One was to remove the excessive Li 2 CO 3 and the thus-generated sites could adsorb gaseous oxygen, which was catalyzed to directly oxidize the gas-phase benzene into surface by-products at low temperatures (150−200 °C) following the Elay-Rideal pathway. Another more important role was to expose the bulk lattice oxygen by eliminating the surface oxygen species. The thus-exposed bulk lattice oxygen worked at high temperatures (250−400 °C) and could effectively oxidize the adsorbed benzene following the Mars-van Krevelen mechanism.
研究领域:
材料科学
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环境工程
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催化
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
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IF 3.7
Yumin Wang,Ting Xu,Lide Xu,Gan Miao,Fangchao Li,Xiao Miao,Jingwei Lu,Zhiqiang Hou,Guina Ren,Xiaotao Zhu
Adhesive hydrogels are considered to be promising interfacial adhesive materials for various applications; however, their adhesive strength is significantly reduced when immersed in liquid environments (water and oil) due to obstruction of the liquid layer or swelling in liquid, and they could not always be reused when the failure of the adhesive performance occurred. Herein, a graphite oxide/poly(vinyl alcohol) (GO/PVA) hydrogel with strong adhesion in air and under liquid environments was developed by rationally regulating the interactions of water and dimethyl sulfoxide (DMSO) in the binary liquid system. The strong interaction between water and DMSO allowed the water layer of the GO/PVA hydrogel on the hydrogel surface to act as a shield to repel oil in air, under water, and even when immersed in oil, and it also endowed the obtained hydrogel with antiswelling property when immersed in water and oil. Importantly, the GO/PVA hydrogel could serve as an advanced adhesive to firmly bond different substrates in air, under water, and under oil, and interestingly, its dry and wet adhesive performance was repeatable and recyclable. This work is expected to be an important addition to the field of adhesive soft materials.
研究领域:
材料科学
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化学工程
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粘合材料
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Yuxin Lin,Jingyi Chen,Yuhan Mai,Liyun Chen,Zheng Chen,Guodong Wang,Lina Deng,Peng Xu,Cai Yuan,Longguang Jiang,Mingdong Huang
Air pollution caused by bacteria and viruses has posed a serious threat to public health. Commercial air purifiers based on dense fibrous filters can remove particulate matter, including airborne pathogens, but do not kill them efficiently. Here, we developed a double-grafted antibacterial fiber material for the high-efficiency capture and inactivation of airborne microorganisms. Tetracarboxyl phthalocyanine zinc, a photosensitizer, was first grafted onto the polyester (PET) fiber, followed by coating with chitosan on the surface of PET fiber to make a double-grafted fiber material. Under the irradiation of light with a specific wavelength (680 nm), double-grafted fiber materials killed up to 99.99% of Gram-positive bacteria and Gram-negative bacteria and had a significant antibacterial effect on drug-resistant bacteria. The double-grafted PET fiber showed broad-spectrum antibacterial activities and was capable to inactivate drug-resistant bacteria. Notably, in filtration experiments for airborne bacteria, this double-grafted PET fiber demonstrated a high bacteria capture efficiency (95.68%) better than the untreated PET fiber (64.87%). Besides, the double-grafted PET fiber was capable of efficiently killing airborne bacteria. This work provides a new idea for the development of air filtration materials that can efficiently kill airborne pathogen and has good biosafety.
研究领域:
材料科学
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环境科学
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生物技术
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公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
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IF 12.1
Pengzhan Yang,Nian Li,Wei Guo,Zheng Zhang,Shudong Zhang,Jin Zhong Zhang,Zhenyang Wang
To endure extreme conditions, silica fiber aerogels are expected to maintain ultralow thermal conductivity at high temperatures. However, the weak infrared extinction capacity of SiO 2 fiber aerogels fails to effectively suppress thermal radiation, resulting in high thermal conductivity at high temperatures. Here, SiO 2 -air-SiC fibers with high extinction shells, air interlayer, and amorphous core are fabricated by low-pressure carbothermal reduction. Owing to low pressure conditions that reduce Gibbs free energy of the reaction and increase the diffusion rate of the gas molecules, the reaction can occur in seconds. With the mitigation of thermal radiation by the incorporation of SiC shell with high extinction capacity and the weakening of gas-phase heat conduction in air interlayer generated by reaction below the mean free path of gas (70 nm), the aerogel shows ultralow thermal conductivity in a wide temperature range (the thermal conductivity at 1000 °C is 0.108 W m −1 K −1 ). Meanwhile, the ultra-fast reaction rate ensures the amorphous structure of silica core, which can maintain the flexibility of the aerogel by triggering the shear band (up to 80% elastic compressive strain and bending recovery property). The combination of high-temperature thermal insulation and high flexibility shows good potential for thermal insulation applications under extreme conditions.
研究领域:
材料科学
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纳米技术
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热工学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
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2025
·Vol. 17
·期 1
·1-11
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IF 36.3
Liu Jianbo,Zhang Meng,Sun Xiaoran,Xiang Linhu,Yang Xiangyu,Hu Xin,Wang Zhicheng,Hou Tian,Qin Jinzhao,Huang Yuelong,Abdi-Jalebi Mojtaba,Hao Xiaojing
RbI is the most effective in mitigate PbI 2 precipitation caused by Pb(SCN) 2 while maintaining large grains.
Rb is kept at the grain boundaries during crystallization and Ostwald ripening, contributes to a slow growth of the grains.
Wide-bandgap perovskite solar cells with blade-coated perovskite in air achieved a certified power conversion efficiency of 23%, among the highest values reported.
研究领域:
材料科学
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光伏技术
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薄膜技术
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纳米技术
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固体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
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2022
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IF 6.959
Qing Guo,Xin Ye,Leilei Zhang,Qinglian Lin,Cuicui Li,Quanxiang Han,Xiaoxin Zheng,Jinke Jiang,Huamiao Zhang,Yang Liu,Xutang Tao
The formation process of hybrid perovskites affects the morphology, performance, and stability of the materials to a large extent. This work takes the preparation of a prototypical perovskite, methylammonium lead iodide (MAPbI3) from vapor conversion to illustrate the effect of reaction conditions. First, we applied our recently invented microspacing in-air sublimation (MAS) to grow PbI2 crystals with thicknesses ranging from several to hundreds of nanometers. The PbI2 single crystals were employed to investigate the conversion to MAPbI3. This proved that vapor conversion is indeed a single-crystalline-to-polycrystalline process, following a deconstruction–reconstruction mechanism. Both the crystal thickness and activation temperature greatly affect the revolution, while the morphology of the formed perovskite is dictated by the thickness of the precursor crystal. Clarification of the intrinsic and exerted factors on the conversion process is conducive to a deep understanding of the perovskite formation process.
研究领域:
材料科学
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化学
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纳米技术
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太阳能
✓ 已验证
产品关联
DOI
高影响因子
Communications Chemistry
·
2025
·Vol. 8
·期 1
·1-11
·
IF 6.2
Wang Min,Luo Xiongfei,Wang Qunying,Strehmel Veronika,Chen Zhijun,Li Shujun,Strehmel Bernd
Valorization of waste for chemical processes addresses a challenging task for the society. Soda lignin ( AL ) available in the pulp industry operated in a photocatalytic cycle CuX 2 / L (X: Br, Cl; L : Me 6 TREN: Tris[2-(dimethylamino)ethyl]amine) and to initiate radical photopolymerization of methyl methacrylate (MMA) with α-bromophenylacetate (EBPA) by exposure at 420 nm. This resulted in poly(methyl methacrylate) (PMMA ) exhibiting a dispersity <1.3 with CuX 2 /L loading of ≲ 52 ppm. Deactivator reduction increased dispersity. MMA, styrene, and benzyl methacrylate successfully served as monomers for chain extension and block copolymerization experiments. This worked with CuX 2 /L ≥ 6.5 ppm, although conventional radical polymerization additionally competed. Adding of sodium pyruvate enabled radical photopolymerization under air. Modification of lignin with an aryl sulfonate group resulted in a one-component photoinitiator. It successfully initiated radical photopolymerization of a monomer mixture of (hydroxyethyl)methacrylate (HEMA) and urethane dimethacrylate (UDMA). Scale-up experiments approved practicability of photo-ATRP.
研究领域:
高分子化学
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绿色化学
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光催化
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材料科学
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可持续化学
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工业化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）