JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Hongwei Pan,Xin Zhang,Yubao Jia,Yao Zhang,Zhigang Jiang,Caixia Sun,Xu Li,Lei Zhu,Kuikui Wang
Electronic structure regulation is one of the essential strategies for developing advanced electrocatalysts . Herein, FeOOH was electrodeposited on the surface of NiSe 2 /Ni 2 O 3 , resulting in a layered NiSe 2 /Ni 2 O 3 /FeOOH interfacial composite with a unique hierarchical structure and strong electronic interactions. This sheet-like nanostructure provides sufficient space for mass transfer, fully exposes the active sites, and accelerates the reaction kinetics. The optimal sample exhibits excellent oxygen evolution reaction (OER) activity with a low overpotential of 270 mV at a current density of 100 mA cm −2 and a Tafel slope of only 54.7 mV dec −1 . It also has excellent durability. This study provides a new perspective for developing efficient electrocatalysts by constructing interfacial composites.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2016
·Vol. 11
·期 1
·1-9
·
IF 2.584
Gao Qiqian,Sun Shihan,Li Xuesong,Zhang Xueyu,Duan Lianfeng,Lü Wei
In present work, two-dimensional g-C 3 N 4 was used to modify TiO 2 nanorod array photoanodes for CdS quantum dot-sensitized solar cells (QDSSCs), and the improved cell performances were reported. Single crystal TiO 2 nanorods are prepared by hydrothermal method on transparent conductive glass and spin-coated with g-C 3 N 4 . CdS quantum dots were deposited on the g-C 3 N 4 modified TiO 2 photoanodes via successive ionic layer adsorption and reaction method. Compared with pure TiO 2 nanorod array photoanodes, the g-C 3 N 4 modified photoanodes showed an obvious improvement in cell performances, and a champion efficiency of 2.31 % with open circuit voltage of 0.66 V, short circuit current density of 7.13 mA/cm 2 , and fill factor (FF) of 0.49 was achieved, giving 23 % enhancement in cell efficiency. The improved performances were due to the matching conduction bands and valence bands of g-C 3 N 4 and TiO 2 , which greatly enhanced the separation and transfer of the photogenerated electrons and holes and effectively suppressed interfacial recombination. Present work provides a new direction for improving performance of QDSSCs.
研究领域:
材料科学
·
光电器件
·
能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2018
·Vol. 124
·期 17
·
IF 2.176
Ye Xianzhu,Li Ming,Li Daoru,Li Bin,Zhang Yafei
The development of a material with high ampacity to allow current to flow through narrow channels is one of the most promising ways to address the progressive miniaturization and light weight of electronic devices. The efficient synergistic electron transmission by compounding 1D/2D carbon materials with a metal matrix via various methods in recent years has attracted great research interest due to their potential utilization in electronics. In this study, a copper (Cu) matrix with a 3D nitrogen (N) doped-multi-walled carbon nanotubes (MCNTs) interface with prominent physical features is reported and fabricated, involving the use of nano-self-assembly-heat-modification by adopting polyethyleneimine-nano-Cu and carboxyl MCNTs. Young's modulus was enhanced from 28.8 to 92.2 GPa due to a higher efficiency of stress transfer and interfacial adhesion, and the hardness fitted by Gauss distribution was increased by ∼69% (∼39.7 HRC). Toward the stability after a modification of vacuum reduction sintering, the initial oxidation temperature (T d ) was increased largely from 232 °C to 286 °C, and thermal conductivity was enhanced eminently from 358 to 548 W/(m K) due to more efficient electron/phonon motion. Moreover, synergistic electron transmission endowed the final Cu-N-CNTs with a higher ampacity (7.23–16.98 × 10 4 A cm −2 ), which could be further observed by the time-evolution of electrical resistivity under a constant current density. The improved physical features state that the assembled 3D N-CNTs interface possesses prominent characteristics and potential for directing the deep applications of 1D or 2D carbon materials in electronic science.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Liu Zhang,Chenyu Wang,Yunxiao Wei,Jie Chen,Haimeng Xin,Hengyu Zhang,Tiantian Liu,Ping Lin,Peng Wang,Xiaoping Wu,Xuegong Yu,Zhenyi Ni,Can Cui,Lingbo Xu
Interfacial recombination at the defective buried interface of perovskite solar cells (PSCs) has long been a persistent and formidable challenge. Introducing molecular bridge via self-assembled molecules (SAMs) offers an effective strategy to mitigate this issue, primarily by chemically passivating interfacial defects that cause nonradiative recombination. However, the influence of SAMs on radiative recombination is often overlooked. In this study, two SAMs with similar molecular configurations but distinct electron-donating/-withdrawing characters─3-thiopheneboronic acid (TBA) and 4-pyridineboronic acid (PBA)─are introduced at the buried interface of n-i-p PSCs. Although both SAMs effectively passivate defects, the PSCs based on them exhibit contrasting trends of performance gain and loss for PBA and TBA, respectively. Mechanistic investigations reveal that TBA featuring an electron-donating thiophene group induces n-type doping in the SnO2 electron transport layer and exacerbates radiative recombination loss, while PBA with the electron-withdrawing pyridine group behaves in an opposite way. These findings highlight the critical role of the electronic effects of SAMs on buried interface recombination beyond their defect passivation function. The trade-off between these two effects is essential for optimizing buried interface engineering through SAMs.
研究领域:
材料科学
·
物理化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8838-8846
·
IF 2.324
Zhang Hailiang,Yuan Shuai,Qiu Zhiwen,Jiang Yanan,Zhu Xiaomeng,Wan Xingxing,Cao Bingqiang
Copper iodide (CuI) thin film grown by a direct vacuum thermal evaporation method at low temperature is utilized as inorganic hole transport layer in planar CH 3 NH 3 PbI 3−x Cl x -based perovskite solar cell. The device performance is mainly controlled by the deposition rate of CuI layer for optimized thickness. The reason was investigated in detail by transient photovoltage/photocurrent spectroscopy (TPV/TPC), X-ray photoelectron spectroscopy (XPS), and the energy-dispersive X-ray spectrum (EDS). The results indicate that larger deposition rate leads to a non-stoichiometric CuI layer with excess iodine. More importantly, the redundant iodine is illustrated as the recombination center that results in interface recombination. Under optimized CuI growth condition, a power conversion efficiency of 6.4% has been achieved with a short-circuit current density (J SC ) of 16.4 mA/cm 2 , an open-circuit voltage (V OC ) of 730 mV, and a fill factor (FF) of 54%. Our results open a possibility for further improvement of perovskite solar cells by controlling the concentration and distribution of iodine in the perovskite films.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Ye Jiang,Lijun Du,Wenyuan Lang,Shuyu Liu,Bing Xue,Shuguang Yang
Novel thin-film-composite (TFC) nanofiltration (NF) membranes with polysulfone (PSF)/sulfonated polytrifluorostyrene (SPTFS) substrate and polyethyleneimine (PEI)/SPTFS selective layer were fabricated via the combination of phase inversion and stepwise interfacial complexation. As the increase in SPTFS additive during phase inversion, PSF/SPTFS substrates exhibited macrovoids cross-sectional structures, smaller water contact angle, lower surface zeta potential, and excellent water flux. The PEI/SPTFS selective layer was constructed through stepwise interfacial complexation. Attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) results verified the successful complexation of polyelectrolytes on PSF/SPTFS substrate. The water flux and selectivity experiments revealed that the TFC membrane with a single PEI/SPTFS bilayer (TFC-1) presented a desired pure water flux of 28.0 (L m −2 h −1 bar −1 ) and excellent dye rejections of MB, CR, AR66 above 98 %. Moreover, TFC-1 membrane demonstrated a ∼11-fold lower adsorption of bovine serum albumin (BSA, 5.8 µg cm −2 ) compared to the pristine PSF membrane, indicating a great static anti-pollution performance. This study provides a facile strategy to prepare fluoropolymer-modified NF membranes with high water flux, excellent dye rejection and low non-specific adsorption.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Yufei Liu,Siyuan Jiang,Wei Yan,Jun Qin,Min He,Shuhao Qin,Jie Yu
Improving complexation at the interfaces and regulating the crystal transformation behaviors of polyamide 6 (PA6) composites with high mechanical and thermal properties are essential for the industrial applications of PA6. In this work, the effects of adding p (N-(4-F-phenylmaleimide)-alt-styrene) (PFS) on the crystal transformation, thermostability, thermal conductivity , and mechanical properties of PA6 were investigated and discussed systematically. The resu---lts from heat deflection temperature (HDT), dynamic mechanical analysis (DMA ) and thermal conductivity tests indicate that PFS greatly increases the HDT, glass-transition temperature ( T g ), and thermal conductivity of PA6. Simultaneously, when the content of PFS is 10%, the tensile strength and flexural moduli of PA6/PFS composites are increased by 10.5 and 17.8% compared with that of pure PA6, respectively. The results from differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) show that PFS induces the transformation of PA6 from γ to α crystals by interfacial complexation. This work offers a facile approach for producing materials with high thermal and mechanical performances that can be potentially used in automobiles, electronics, and related technologies.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Liquan Yao,Limei Lin,Hui Liu,Fengying Wu,Jianmin Li,Shuiyuan Chen,Zhigao Huang,Guilin Chen
Antimony chalcogenide Sb 2 (S, Se) 3 is attracting a lot of attention as photovoltaic absorber owing to its rewarding photoelectric properties, low toxicity, and earth abundance. However, its device efficiency is still limited by the absorber material quality and device interface recombination. In this work, a fluorine-doped tin oxide (FTO) substrate with ultra-thin SnO 2 layer and a low-cost stabilized carbon paste are introduced as a front and back contact layer respectively in Sb 2 (S, Se) 3 based planar solar cells. Over 5.2 % efficiency is demonstrated in the structure of FTO/SnO 2 /CdS/Sb 2 (S, Se) 3 /Carbon/Ag, where the Sb 2 (S, Se) 3 is prepared by hydrothermal technique. The complementary device physics characterizations reveal that the interfacial recombination between TCO and CdS is significantly suppressed by the introduction of ultra-thin SnO 2 layer, which is profited from the leakage protection and bandgap offset engineering by its high resistivity and suitable conduction band minimum. Meanwhile, the successful adoption of the low-cost stabilized carbon as a back contact here shows an enormous potential to replace the conventional organic hole transport materials and noble metal. We hope this work can provide positive guidance to optimize Sb 2 (S, Se) 3 based planar solar cells in the future.
研究领域:
材料科学
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光伏技术
·
可再生能源
✓ 已验证
DOI
高影响因子
Nature Energy
·
2022
·Vol. 7
·期 10
·966-977
·
IF 67.439
Gong Yuancai,Zhu Qiang,Li Bingyan,Wang Shanshan,Duan Biwen,Lou Licheng,Xiang Chunxu,Jedlicka Erin,Giridharagopal Rajiv,Zhou Yage,Dai Qi,Yan Weibo,Chen Shiyou,Meng Qingbo,Xin Hao
The conversion efficiency of kesterite solar cells has been stagnated at 12.6% since 2013. In contrast to chalcopyrite solar cells, the performance of kesterite solar cells is seriously limited by heterojunction interface recombination. Here we demonstrate kesterite/CdS heterojunction is constructed on a Zn-poor surface due to the dissolution of Zn 2+ during chemical bath deposition. The occupation of Cd 2+ on the Zn site and re-deposition of Zn 2+ into CdS creates a defective and lattice-mismatched interface. Low-temperature annealing of the kesterite/CdS junction drives migration of Cd 2+ from absorber back to CdS and Zn 2+ from absorber bulk to surface, achieving a gradient composition and reconstructing an epitaxial interface. This greatly reduces interface recombination and improves device open-circuit voltage and fill factor. We achieve certified 12.96% efficiency small-area (0.11 cm 2 ) and certified 11.7% efficiency large-area (1.1 cm 2 ) kesterite devices. The findings are expected to advance the development of kesterite solar cells.
研究领域:
材料科学
·
光伏技术
·
可再生能源
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yu Mao,Yuanyuan Huang,Yanmei Deng,Mengyang Wang,Wenjian Chan,Ziyang Ren,Ening Gu,Xianzhong Lin,Guowei Yang
Inkjet-printed Cu 2 ZnSn(S,Se) 4 (CZTSSe) has emerged as a promising route for cost-effective and high-throughput production of photovoltaic devices. To further enhance the performance of CZTSSe solar cells, it is urgently necessary to address the issues of severe interface recombination and carrier transport resistance within the devices. In this sense, a surface modification strategy is introduced by treating the inkjet-printed CZTSSe absorber surface with cadmium chloride (CdCl 2 ). As a result, the Cd-treated CZTSSe films exhibit smooth and compact surfaces and a small conduction band offset, which boosts carrier transport. Furthermore, the Cd treatment significantly reduces interface defects from 5.1 × 10 15 to 2.4 × 10 15 cm −3 , thereby reducing carrier recombination while expanding the depletion width from 138 to 272 nm and improving carrier collection efficiency. Consequently, the optimized CZTSSe device achieves a stimulating increase in power conversion efficiency from 11.83% to 13.64%, which is the highest efficiency reported to date for inkjet-printed CZTSSe solar cells. This work provides critical insights for advancing cost-effective and high-performance inkjet-printed CZTSSe solar cells.
研究领域:
光伏技术
·
材料科学
·
半导体器件
·
薄膜技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Jiang Cheng,Zhen Zhang,Minghao Zhao,Youwei Guan,Xihao Chen,Xiang Meng,Hua Tang,Lu Li,Shenghao Wang
CdS films prepared via chemical bath deposition exhibit extremely good performance as a buffer layer of chalcogenide solar cells. However, their commercial application is very limited because of the production of a large amount of wastewater containing cadmium. In this study, we develop an efficient way to prepare CdS films using the spin-coating technique. The spin solution is anhydrous, and the oxygen content can be well controlled by changing the Cd/S content ratio in the solution. The crystal structure, morphology, and optical and electrical properties of CdS films with different Cd/S content ratios are characterized. The effect of the oxygen content on the device performance is investigated. We find that the introduction of an appropriate amount of oxygen can improve the carrier transport efficiency by decreasing the interface recombination. The spin-coated CdS films have good coverage of the substrate for film thicknesses below 50 nm. By the optimizing of Cd/S content ratio, we achieve an improved efficiency of 5.76% for the Sb 2 Se 3 solar cells. This preparation technique is sufficiently simple for large-scale processing and produces much less wastewater containing cadmium; thus, it is promising for application to future large-scale solar cell production.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 18
·期 1
·62
·
IF 36.3
Zheng Xiaojian,Ahmed Shehzad,Zhang Yu,Xu Guoqiang,Wang Junyu,Lu Di,Shi Tingshu,Tang Jun,Yan Lei,Chen Wei,Han Peigang,Liu Zhixin,Khan Danish,Wang Xingzhu,Tang Zeguo
Benzamidine derivatives are utilized to differentiate between 2D passivation and amorphous passivation.
Introducing an n-type 2D passivation layer enhances the charge extraction and transportation and reduces the interface recombination in inverted perovskite solar cells.
The intramolecular charge of organic ligands is critical for the formation of crystalline 2D capping layers on 3D perovskite layers.
The long-term stability of inverted perovskite solar cells is improved owing to hydrophobic sealing of 3D perovskite via crystalline 2D capping.
研究领域:
材料科学
·
光伏技术
·
表面化学
·
半导体器件
·
纳米结构材料
✓ 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）