SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2020
·
IF 6.984
Peiyu Tan,Feifei Lu,Yuge Han
A new type of device with adjustable reflective capabilities in the mid-IR is elaborated from the combination of Poly (3,4-ethylenedioxythiophene)/Poly (styrenesulfonate) (PEDOT/PSS), gold-coated non-porous polyimide substrate and gel electrolyte. Prior to device characterization, the influence of polymer thickness and gold substrate types on reflectance modulation of PEDOT-Au films is scrutinized to obtain the film with optimum quality. A combination of SEM images and reflectance curves confirms that adopting thin PEDOT/PSS on the non-porous substrate can achieve large amplitude reflectance regulation. Further, a mechanical perforating method is developed to address the issue that ions cannot transport between the polymer film and the counter electrode when this PEDOT/non-porous film assembled into device. An in-depth study shows that by varying the punching side, porosity and aperture, a device with front holes of porosity 12.77% affords the highest reflectance contrast of 0.566 over the wavelength range of 3-5 μm, meanwhile exhibits effective temperature changes of approximately 16 °C. These results inspire interesting perspectives regarding the fabrication of PEDOT-based devices with controllable IR electroreflective performance.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2021
·Vol. 23
·期 12
·2100623
·
IF 3.862
Yu Yao,Wei Guo,Xingwen Zhou,Peng Peng
The growing demand for highly efficient heat management in flexible electronics requires fabrication of highly conductive flexible films. Herein, Cu–C film on a polyimide (PI) substrate is fabricated to form a layered Cu–C/PI composite conductive film using direct laser writing. Its oxidation resistance is significantly improved compared with the written Cu film due to the presence of a graphite shell on Cu particles in the Cu–C film. Furthermore, the Cu–C/PI composite film shows better thermal properties than Cu/PI. This work provides a one-step method for rapidly fabricating Cu/PI and Cu–C/PI composites with good thermal stability and conductivity.
研究领域:
材料科学
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2019
·Vol. 65
·期 8
·e16620
·
IF 3.463
Xiaoxu Zhao,Hao Zhang,Sheng Xu,Yan Wang
In this study, a novel covalent-assisted seeding method is developed to fabricate well-intergrown ZIF-8 membrane on polyimide (PI) substrate with imidazole-2-carboxaldehyde (ICA) as the covalent agent between ZIF-8 layer and PI substrate. Compared to ethylenediamine-crosslinked PI membrane and ZIF-8/PI membrane synthesized without covalent-assisted seeding method, ZIF-8/PI membrane synthesized with ICA covalent-assisted seeding method shows improved pervaporation performance for isopropanol dehydration. Subsequent surface coating with polydimethylsiloxane or polydopamine is applied to mitigate the grain boundary of ZIF-8/PI membrane, which results in a further performance enhancement. The morphologies and physicochemical properties of the resultant membranes are characterized by scanning electron microscope, attenuated total reflectance-Fourier transform infrared, X-ray diffraction, and water contact angle. The effect of operation temperature on the separation performance is also carried out. This work demonstrates the novel covalent-assisted seeding method for the preparation of ZIF-8 membrane with high-performance, which may hold a great potential for various ZIF membranes separation applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Baoyin Li,Xinda You,Hong Wu,Runlai Li,Ke Xiao,Yanxiong Ren,Hongjian Wang,Shuqing Song,Yuhan Wang,Yunchuan Pu,Xiaochun Huang,Zhongyi Jiang
Fabricating metal-organic framework (MOF) membranes on processable and flexible polymeric substrates is of great significance for potential practical application, but remains technically challenging due to the lack of nucleation sites on polymeric substrates. Here, we report an efficient and facile method to render abundant and uniform nucleation sites on the substrate surface by pre-anchoring metal ions through coordination-driven self-assembly of metal-organophosphate. The coordination between the multidentate phytic acid (PA) and the metal ions enables the functionalization of polymeric substrates with a metal-phytic acid layer, which anchors metal ions to promote the subsequent generation of thin and defect-free MOF layers thereon. As an illustration, the ZIF-8 membrane was synthesized on Zn 2+ -PA functionalized polyacrylonitrile substrate and optimized by regulating the pre-anchored Zn 2+ content. The obtained ZIF-8 membrane exhibited a superior separation performance for C 3 H 6 /C 3 H 8 mixture, harvesting selectivity up to 150 with C 3 H 6 permeance of 70 GPU. Besides, the polycrystalline ZIF-8 membrane also displays excellent bending and pressure resistance due to the strong combination between the MOF layer and the polymeric substrates from the fortified and robust bridging coordination effect of the metal-organophosphate layer. Our strategy can be extended to diverse MOFs and polymeric substrates, paving a facile and generic way to fabricate MOF membranes.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 20
·25137-25148
·
IF 2.478
Gong Jun-Shuai,Wang Zhi-Liang,Qu Hui-Wen,Cang Ding-Yong
A polyimide (PI)-based flexible bandpass filter is fabricated by self-metallization technology, which covers Wireless Local Area Network (WLAN) of 5.15—5.875 GHz. The measured characteristics indicate the flexible filter under flat state has the return loss of better than 20 dB, the minimum insertion loss of 0.83 dB, a 3 dB bandwidth of 0.725 GHz, and the central frequency of 5.5 GHz. At the same time, the designed filter is measured in different bending and folding conditions. Simulated and measured results are similar whether the filter is under flatting, bending, or folding conditions. Fatigue test and timeliness test are studied to confirm that the filter has stable chemical and mechanical properties. The formed silver layers fabricated by self-metallization technology have good mechanical and electrical flexibility. The designed flexible filter is promised for integration within future flexible electronics.
研究领域:
电子工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ning Chen,Dong Yang,Zi-Long Zhang,Jun-Hui Su,Wen-Yu Yang,Fu Li,Guang-Xing Liang,Jing-Ting Luo,Yue-Xing Chen,Zhuang-Hao Zheng
Flexible thermoelectric (TE) materials are promising candidates for powering wearable electronics and self-sustained microdevices. Here, we report the synthesis of S-doped Bi 2 Te 3 flexible thin films (f-TFs) on polyimide (PI) substrates via a two-step method combining physical vapor deposition and subsequent thermal diffusion. Sulfur incorporation effectively substitutes Te in the Bi 2 Te 3 lattice, leading to lattice contraction and a moderate increase in carrier concentration. Structural analyses reveal that S doping shortens the Bi–Te/S bonds and weakens interlayer van der Waals interactions, facilitating strain relaxation through nanoscale slip. As a result, the 3.8 % S-doped film achieves a peak power factor of 14.8 μW cm −1 K −2 at 300 K and exhibits moderate electrical-conductivity stability under repeated bending, with resistance variation below 10 % after 1000 cycles. These findings demonstrate that thermal diffusion-driven compositional tuning provides a practical approach to enhancing both thermoelectric performance and mechanical flexibility in Bi 2 Te 3 -based f-TFs.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Kuo Chen,Peng Li,Hongyu Zhang,Haixiang Sun,Xiujie Yang,Dahu Yao,Xianjuan Pang,Xiaolei Han,Q. Jason Niu
Organic solvent nanofiltration (OSN) has a good application prospect in the field of organic solvent separation, but low organic solvent permeance is the main obstacle restricting its application. This work reports a thin film composite (TFC) nanofiltration membrane prepared by interfacial polymerization (IP) on the HKUST-1 MOF interlayer grown in situ on a crosslinked polyimide (PI) substrate. The MOF interlayer improves the hydrophilicity and porosity of the support membrane. In addition, the MOF interlayer controls the diffusion of piperazine (PIP) during the IP process, which induced to form a thin and highly crosslinked polyamide (PA) separation layer. The increased effective membrane area and the reduced thickness of PA separation layer resulted in a methanol permeation flux up to 9.59 L·m −2 ·h −1 ·bar −1 , while maintaining the rejection of the negatively charged Brilliant Blue G 250 dye (MW = 858.05 g·mol −1 ) at 98.8%. Furthermore, the stability of the TFC membranes in polar aprotic solvents such as N, N-dimethylformamide highlights their potential for OSN applications in chemical industries.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2020
·Vol. 8
·期 17
·2000669
·
IF 8.286
Tian-Yi Qu,Li-Jian Zuo,Jing-De Chen,Xueliang Shi,Ting Zhang,Ling Li,Kong-Chao Shen,Hao Ren,Shu Wang,Feng-Ming Xie,Yan-Qing Li,Alex K.-Y. Jen,Jian-Xin Tang
Flexible organic solar cells (OSCs) are very promising for use in portable power supply devices due to the advantages of low-cost, light-weight, and flexibility. However, the efficiencies of flexible OSCs are limited by the flexible transparent electrodes owing to their nonoptimal electrical, optical, and mechanical properties. To address these challenges, leaf-like biomimetic electrodes are proposed to achieve an efficient light capture and glossy surface for a high-efficiency flexible OSC. To mimic the internal anatomy of the leaf, the conformable electrode stack consists of a flexible polyimide substrate, light-scattering polystyrene spheres, zinc oxide protecting layer, and electrically conductive silver nanowires to obtain a high transmittance, low sheet resistance, and low surface roughness. A record-high power conversion efficiency of 16.1% is realized by a flexible OSC with the biomimetic electrode design, comparable to those rigid devices on glass. Moreover, the flexible OSC on this biomimetic electrode exhibits a robust bendability against flexural strain, retaining 85% of the initial efficiency after 5000 bending cycles at a radius of curvature as small as 1.0 mm.
研究领域:
材料科学
·
可再生能源
·
纳米技术
·
光电学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）