RSC Advances
·
2018
·Vol. 8
·期 8
·4119-4124
·
IF 2.936
Pengpeng Zhang,Qing Yu,Xue Min,Linbao Guo,Jiangjian Shi,Xiangyun Zhao,Dongmei Li,Yanhong Luo,Huijue Wu,Qingbo Meng,Sixin Wu
The annealing temperature of solution-processed Cu2ZnSn(S,Se)4 (CZTSSe) precursor films has been carefully optimized for favorable selenization. At higher temperature, more solvent will be removed, and the crystallinity of the precursor films can be improved. It is found that, although the crystallinity of selenized film is continuously enhanced by increasing the temperature, a dense CZTSSe film with round and large grains can only be achieved at medium high temperature ranging from 350 to 400 °C. Further investigation reveals that, in this regime, the carrier and defect densities are obviously reduced, leading to average photoelectric conversion efficiency (PCE) improved from 5.1% to 9.4%. An optimal annealing temperature of 380 °C is obtained and up to 10.04% of photoelectric conversion efficiency has been achieved.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Shidong Song,Yongqiang Xu,Yanli Ruan,Hong Wang,Dequan Zhang,Joykumar Thokchom,Donghai Mei
Amorphous Li–La–Zr–O (LLZO) solid-state electrolyte thin films are promising alternatives to the well-established lithium phosphorus oxynitride (LiPON) electrolyte for all-solid-state lithium batteries due to their potentially higher Li-ion conductivity and stability. Herein, the enhancement methodology in the ionic conductivity of amorphous LLZO-based thin films is investigated. By doping with Ta, the conductivity of the amorphous LLZO film at 30 °C (3.9 × 10–7 S cm–1) can be enhanced by up to an order of magnitude (2.6 × 10–6 S cm–1), ascribed to tuning Li conduction in local near-order LLZO nanodomains. On that basis, an isomeric Li–La–Zr–Ta–O (LLZTO) amorphous–crystalline composite thin film is prepared via incorporating cubic LLZTO particles into the amorphous LLZTO matrix. The composite film with 10 wt % cubic LLZTO filler can further achieve an ionic conductivity of 0.8 × 10–5 S cm–1 at 30 °C, which is comparable to the best values obtained for the state-of-art LLZO-based thin films. Li transport through the well-connected cubic LLZTO filler network and along the interfaces between the crystallites and the amorphous matrix in the LLZTO composite thin film may offer fast and long-range Li-conduction pathways, which supplement the ionic conduction in the amorphous matrix with short-range-ordered and long-range-disordered structures.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 21
·215202
·
IF 3.874
Guandong Wang,Daiming Liu,Shuangqing Fan,Zhaoyang Li,Jie Su
In this work, high-dielectric-constant (high-k) erbium oxide（Er2O3）film is fabricated using the spin coating method, and annealed at a series of temperatures (from 400 °C to 700 °C). The effect of annealing temperature on the microstructural and electrical properties of Er2O3 nanofilm is investigated. To demonstrate the applicability of the Er2O3 film, the indium oxide (In2O3) thin film transistor (TFT)-based amorphous Er2O3 dielectric film is fabricated at different temperatures. The TFT-based EO-600 shows a low-operating voltage and good electrical properties. The inverter demonstrates that the Er2O3 nanofilm synthesized by the sol-gel method could be a promising candidate as the dielectric layer in a low-voltage electronic device.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 17
·1456
·
IF 4.4
Guoqiang Xi,Hangren Li,Dongfei Lu,Xudong Liu,Xiuqiao Liu,Jie Tu,Qianqian Yang,Jianjun Tian,Linxing Zhang
Strontium aluminate, with suitable lattice parameters and environmentally friendly water solubility, has been strongly sought for use as a sacrificial layer in the preparation of freestanding perovskite oxide thin films in recent years. However, due to this material’s inherent water solubility, the methods used for the preparation of epitaxial films have mainly been limited to high-vacuum techniques, which greatly limits these films’ development. In this study, we prepared freestanding single-crystal perovskite oxide thin films on strontium aluminate using a simple, easy-to-develop, and low-cost chemical full-solution deposition technique. We demonstrate that a reasonable choice of solvent molecules can effectively reduce the damage to the strontium aluminate layer, allowing successful epitaxy of perovskite oxide thin films, such as 2-methoxyethanol and acetic acid. Molecular dynamics simulations further demonstrated that this is because of their stronger adsorption capacity on the strontium aluminate surface, which enables them to form an effective protective layer to inhibit the hydration reaction of strontium aluminate. Moreover, the freestanding film can still maintain stable ferroelectricity after release from the substrate, which provides an idea for the development of single-crystal perovskite oxide films and creates an opportunity for their development in the field of flexible electronic devices.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Fan Yang,Ruixin Ma,Weishuang Zhao,Xiaoyong Zhang,Xiang Li
CZTS has been considered to be a perfect suitable replacement for CuInGaSe 2 (CIGS) which contains the rare elements. This work developed a novel route to fabricate CZTS absorber films based on the integration of non-vacuum and vacuum techniques. This was illustrated by first synthesizing CZTS powder with the method of solid-phase synthesis. Then three different compound targets made of CZTS precursors and pure CZTS powder were utilized to fabricate CZTS absorber films using Radio Frequency (RF) sputtering, followed by a sulfurization process. All synthesized samples were analyzed with respect to their crystal structure, vibrational property, morphology and chemical composition. The photoelectrical properties investigation of the sulfurized absorber films by UV-VIS spectrophotometer and Hall effect measurement can well meet the requirements for potential application in thin film solar cells, demonstrating this approach had great potential for CZTS solar cell production.
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 Materials Chemistry C
·
2025
·
IF 5.1
Yunfan Wang,Xuebin Liu,Junhua Huang,Shaodian Yang,Baohua Li,Weiqiang Huang,Zhiping Zeng,Yougen Hu,Xuchun Gui
The prosperous outdoor exercise activities have raised higher performance and multi-functional requirements for the films used in clothing and equipment. However, developing films that have multi-functions such as comfortable, flexible, high-performance electromagnetic interference (EMI) shielding and exceptional electrothermal heating capabilities remains a significant challenge. Herein, a flexible, highly conductive Cu@CNT film was fabricated using the strategy of copper particles bridging conductive nanotubes and polymer fixing conductive networks. The two-step strategy remarkably enhanced the CNT-based conductive network and improved the electrical conductivity of Cu-2.0@CNT film to 22,051 S/m. The resulting Cu@CNT film demonstrated an outstanding average EMI shielding effectiveness (SE) of 57.8 dB across 5-40 GHz, and a remarkable average EMI SE more than 60 dB in 0.2-1.6 THz at the film thickness of 100 μm. The film also exhibited a normalized EMI SE (SE/t) of 578 dB mm-1, which exceeds most reported film materials. Additionally, the Cu@CNT film exhibited impressive electrothermal heating properties, including a high saturated temperature (over 160 ℃ at 3.5 V), a high heating rate (＞ 10 ℃/s at 3.5 V), a controllable thermal response (＜ 15 s) and a stable and uniform heating distribution. Additionally, as a demonstration, it is used as a flexible electromagnetic wave isolation film and flexible heaters. Therefore, the flexible composite film with multiple protective functions proposed in this work provides a competitive material for the next-generation outdoor clothing and equipment applications.
研究领域:
材料科学
·
纳米技术
·
电磁学
·
高分子科学
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zhen Zhang,Chi Yan,Jiahui Xu,Cui Liu,Xiaojun Ye,Xiao Yuan,Hongbo Li
Atomic layer deposition (ALD) has drawn considerable attention recently for depositing functional films on polymers. However, most polymers are inert and thermally fragile, thus posing many challenges during deposition. This study presents a novel strategy for ALD of an ultrathin Al 2 O 3 film on alkali-treated polyethylene terephthalate (PET) via polydopamine (PDA) modification. The tightly adherent PDA layer exhibited numerous robust active sites (phenolic hydroxyl groups), which are highly desirable for precursor chemisorption during ALD. The modification process was systematically characterized. The PET substrate showed many active sites and a smooth surface after 24 h of PDA deposition. The island growth mode was found during the ALD of an Al 2 O 3 film on the samples. The PDA layer absorbed a large quantity of the precursor (trimethylaluminum [TMA]) during the initial deposition, contributing to the early nucleation and continuous growth of the Al 2 O 3 film. In addition, the presence of the PDA layer narrowed the region of TMA infiltration into the PET, resulting in the formation of a conformal film on the surface. Transmission electron microscopy indicated that an Al 2 O 3 film with a thickness of about 10 nm was formed on the PDA-modified PET substrate after 100 ALD cycles, and exhibited excellent water vapor blocking characteristics. These findings suggest that the added PDA layer has tremendous potential to act as a bonding layer between polymers and ALD functional films.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 16
·2110729
·
IF 19.924
Mengling Xia,Zihao Song,Haodi Wu,Xinyuan Du,Xin He,Jincong Pang,Hongde Luo,Libo Jin,Guifeng Li,Guangda Niu,Jiang Tang
Thanks to its strong X-ray absorption and large carrier diffusion length, perovskites have demonstrated excellent performance for X-ray detection. Combination of perovskite with thin-film transistor (TFT) arrays to construct flat-panel X-ray imager (FPXI) is required for X-ray imaging, yet this is rarely reported. Solution processing of perovskite thick film onto TFT can enable the electronic connection, however the amounts of pinholes inevitably form during the solvent evaporation and result in a porous film with deteriorated performance and stability. Here a novel strategy is raised to achieve high-quality perovskite thick films for TFT integration via soft-pressing and in situ polymerization of multi-functional binder (TMTA). The combined process largely eliminates the pinholes, improves the surface smoothness, passivates grains boundaries, reduces ionic migration, and improves stability. Accordingly, a compact and smooth MAPbI 3 thick film integrating with TFT arrays is prepared for flat-panel X-ray imaging. The largest film (28 × 28 cm 2 ) is obtained with the state-of-the-art performance (ratio of sensitivity to noise current: 1.41 × 10 11 µC Gy −1 A −1 ) among polycrystalline films. It is hoped that the work provides guidance for fabricating compact perovskite thick films and push perovskite FPXI one step further for low-dose X-ray imaging.
研究领域:
材料科学
·
医学影像
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 45
·17066-17074
·
IF 8.067
Zhuochao Wang,Peng Wang,Wenxin Cao,Chunqiang Sun,Zicheng Song,Dongchao Ji,Lei Yang,Jiecai Han,Jiaqi Zhu
Electromagnetic interference (EMI) pollution poses risks to electronic devices and human health and has emerged as a major source of pollution. In addition to being low in weight and exhibiting high transparency, flexibility, and easy processability, the polymer-based transparent conductive films (TCFs) increasingly used for EMI shielding exhibit fragility, and scratches in TCFs during service usually cause severe electromagnetic wave leakage and waste. To address this issue, we designed a DMBA-modified oxime-carbamate polyurethane film with remarkable mechanical strength, high transmittance, and self-healing efficiency and prepared TCFs by uniformly depositing AgNWs and Ti3C2Tx MXene on the material surface. The TCFs show an ultra-low sheet resistance (18 Ω sq−1), high transmittance (82.8%), good EMI shielding effectiveness (SE, 27.1 dB), and excellent retention of properties after 1000 flexures and rapid recovery after three cutoff/self-repair cycles, demonstrating resistance against damage. The novel TCFs exhibit great potential for application in consumer electronics, radio communications, and radar stealth.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2025
·
IF 3.7
Jian Zou,Gang Wang,Shuyu Duan,Chenyi Shi,Xiaobing Yun,Xiuhan Yang,Zhe Du,Huan Qiu,Winniford Bill
An isostatic aroma permeation measurement system was developed using a customized permeation cup and dynamic SPME-GC-FID coupled to a flow-cell unit. The limit of quantitation (LOQ) of the method ranged from 0.012 to 0.054 mg/m 3 with a PDMS-coated SPME Arrow, with typical linearity from 5 to 600 mg/m 3 . The system's repeatability on a polyethylene terephthalate (PET) film was between 8.7% and 25.0% (%RSD, n = 4). The results were verified using headspace GC–MS and thermal desorption GC–MS, with relative average deviation (%RAD) ranging from 6.0% to 20.7%. The aroma barrier performance of six film samples, including PET, biaxially oriented polypropylene (BOPP) and vacuum metalized polyethylene (PET//VMPE), was compared using this method with a mixture of five model aroma compounds, such as 2-methyl pyrazine, 2-heptanone and benzaldehyde. This method provides a sensitive, automated and low-cost solution for evaluating the aroma barrier performance of polymer films, with potential applications in the packaging industry.
研究领域:
分析化学
·
食品科学与工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 25
·4744-4748
·
IF 3.849
Wangen Zhao,Daocheng Pan,Shengzhong (Frank) Liu
Achieving micro-sized and closely packed grains is an essential requirement for high-performance chalcogenide thin film solar cells. Here, I2–II–IV–VI4 (Cu2MnSn(S,Se)4) (CMTSSe) thin films were successfully deposited by carrying out a simple, degradable solution-based process. The structure, composition, and morphology were characterized by powder X-ray diffraction (XRD), energy dispersive spectrometry (EDS), and scanning electron microscopy (SEM), and the Hall effect was also measured. These characterizations indicated that CMTSSe thin films may find applications in photovoltaic absorbing materials. In addition, different substrates were found to affect the morphology and compactness of the grains of the thin film.
研究领域:
材料科学
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Zhengqi Lao,Xiu Liu,Fuzhen Li,Yaoguang Chen,Kang Yang,Ling Chen,Li Jiang,Kancheng Mai,Zishou Zhang
Carbon nanotube (CNT) films have extensive applications due to their excellent electrical, mechanical, and thermal properties. A grand challenge is controlling areal density of CNT films to accommodate various applications. Here, a method based on the Marangoni effect is used to fabricate liquid-supported CNT films with tunable areal density, scalable area, and transferability to arbitrary substrates. By adjusting the viscosity and surface tension of the base liquid media, the Marangoni flow area of surfactant-assisted single-walled CNT (SWCNT) dispersion on the surface of base media was controllable and sparse or dense SWCNT films can be easily obtained. The thickness of the films is controlled by changing the concentration of the SWCNT dispersion. These SWCNT-based transparent-conductive films have widely controllable transmittance and conductivity and exhibit great photoelectric properties (T ∼ 82.4%, Rs ∼ 407 Ω/sq).
研究领域:
材料科学
·
纳米技术
✓ 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）