ACS Applied Materials & Interfaces
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2022
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IF 10.383
Wendong Liu,Zhihui Lei,Rui Yang,Wenkui Xing,Peng Tao,Wen Shang,Benwei Fu,Chengyi Song,Tao Deng
This paper studies the impact of hot pressing on the electrical and thermal performance of thick (thickness >5 μm) conducting polymer poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films after acid treatment. Thick conducting polymer films usually exhibit low electrical and thermal conductivities similar to bulk polymer because charge and heat carriers are easily scattered by the irregular arrangement of crystalline domains inside the polymer. In this work, the in-plane electrical conductivity of thick hot-pressed PEDOT:PSS film exceeded 1500 S/cm, and 50% enhancement was obtained in comparison with its non-hot-pressed counterparts. Its in-plane thermal conductivity reached as high as 1.11 W/mK (improved by almost 100% compared to acid-treated PEDOT:PSS films), which is comparable to that of some commercial thermal pads. Such electrical and thermal enhancement via the hot-pressing process is attributed to the optimized morphology and microstructures, which provide short paths for thermal and electrical transportation. We have also demonstrated that the hot-pressed PEDOT:PSS films could be potentially utilized as a flexible conductor and heat spreader for application in flexible electronics and thermal management, respectively. This study not only offers a new insight into the process–property relationship for conducting polymers but also further enables the use of PEDOT:PSS films with simultaneously improved electrical and thermal performance in practical applications, such as thermal management for organic electrodes in batteries, flexible electronics, soft robotics, and bioelectronics.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
Journal of Materiomics
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2020
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IF 5.797
Qikai Li,Qing Zhou,Long Wen,Weishu Liu
Flexible polymer thermoelectric thin film attracts wide attentions because it is compatible with the wearable electronics and e-skin. Herein, we reported an enhanced thermoelectric power factor of PEDOT:PSS from around 1 μW m −1 K −2 to 117 μW m −1 K −2 and high substrate-free strain of 20% through synergistically tuning the ordering structure and the oxidation state. An ionic liquid (EMImTCM) was used to decouple the ionic interaction between PEDOT and PSS, rearranging the morphology of structure that significantly benefit the mechanical flexibility and the electrical conductivity. The addition of L-ascorbic acid was confirmed as effective dedoping additive of PEDOT polymer that changed the oxidation state and hence boosted the thermoelectric power factor without notable sacrifice of the mechanical flexibility. Moreover, the electrical conductivity of the corresponding film maintained electrically stable (Δ R/R 0 < 0.12%) under 1000 bending cycles which indicates the great bendability. Our work demonstrated the feasibility to controllably tailor the thermoelectric and mechanical performance of the PEDOT:PSS flexible polymer thermoelectric thin film.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2021
·
IF 3.266
Xing Xin,Jiarui Yu,Nan Gao,Xiaowen Xie,Shuai Chen,Jiang Zhong,Jingkun Xu
In aqueous dispersion of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), the mixture dispersion containing different proportion of polyhedral oligomeric silsesquioxanes (POSS) and dimethyl sulfoxide (DMSO) were added. These three components were physically blended to fabricate composite films for improving the mechanical properties and the water resistance of PEDOT:PSS films; a strong drawback hindering their electrical properties. The effect of the ratio of POSS compared to PEDOT:PSS was in particular investigated. It was convincingly proven that the introduction of POSS unit and strong polar DMSO improved surface roughness , hydrophobicity , stability, friction resistance and electrical properties of PEDOT:PSS films.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Guodong Liu,Ling Zheng,Zhuoqing Zhang,Yu Liu,Zhijian Li
The rational preparation and design of electrochromic devices (ECDs) are important for practical application, as integrated on packaging products to express key information by means of some intelligent technologies. This work aims to construct homogeneous film of poly (3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) adopting organic solvents doping and gravure printing on a paper substrate. The formed PEDOT:PSS film is shown to provide successfully the desired high conductivity and excellent stability after mild post-treatment via formic acid . The intrinsic reason for the conductivity enhancement is disclosed and correspondingly discussed. The prepared PEDOT:PSS film thus functions in parallel as an electrochromic and electrode layer in assembled ECDs. The two-layer ECD supports a well-defined electrochromic contrast (Δ E * = 20.5), high light absorption property (0.27) at 650 nm, fast switching, and high coloration efficiency (122.8 cm 2 C −1 ) at a low potential of |2.0| V. More importantly, the intelligent operation of the electrochromic unit is launched using wireless driving rather than external working voltage as usual. In application, the driving voltage for ECDs is obtained from the screen-printed induction coil that can be coupled with the magnetic field of near field communication (NFC) equipped in a smartphone. Thus, the wireless driven electrochromic system can be additionally integrated on the package together with a printed ECD in order to display the product pattern under the interaction of the smartphone, improving the interactivity between packaging products and consumers, thereby having high potential for application in the fields of intelligent packaging.
研究领域:
材料科学
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电子工程
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智能技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 33
·10247-10256
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IF 6.641
Wei-Hsiang Chen,Linlin Qiu,Pengyun Zhang,Pei-Cheng Jiang,Pingfan Du,Lixin Song,Jie Xiong,Frank Ko
To significantly increase the applicability of inverted-planar flexible perovskite solar cells (PSCs), the achievement of high electrical conductivity, excellent moisture resistance and reproducibility of a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer with simple fabrication (low cost and ease of mass manufacture) during spin-coating is the goal pursued by researchers. Herein, for the first time, we propose a facile strategy of cryo-controlled quasi-congealing spin-coating to improve the PEDOT:PSS quality to a new extent. The congealed surface and strengthened hydrogen-bonds between solvent and PSS chains can effectively suppress the moisture corrosion during spin-coating. In addition, the electrical conductivity of PEDOT:PSS can be further enhanced owing to the uniformity of PEDOT:PSS grains and a greater co-solvent effect facilitated by induced Young's modulus during spin-coating. A considerably smooth and uniform film with improved conductivity can be achieved even when fabricated in a high humidity environment. Furthermore, this smooth and passivated PEDOT:PSS can facilitate highly crystalline perovskite and better interfacial contact between them, which not only enhances the efficiency, but also greatly improves repeated mechanical deformation stability of PSCs. As a result, the power conversion efficiency (PCE) of rigid and flexible PSCs can be improved to 17.65% and 15.13%, respectively. Both devices show about 14% enhancement in PCE compared to the conventional one.
研究领域:
材料科学
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能源技术
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纳米技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Jiqiang Qiao,Nianyao Chai,Yuzhe Feng,Jiawei Li,Xiangyu Chen,Yunfan Yue,Sheng Li,Zhongle Zeng,Jiakang Zhou,Huan Wang,Xuewen Wang,Wenyu Zhao,Qingjie Zhang
Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has garnered significant considerable interest in the field of flexible thermoelectric films owing to its very low thermal conductivity, highly adjustable electrical conductivity ( σ ) and Seebeck coefficient ( S ). However, improving the σ and S of PEDOT:PSS simultaneously remains challenging for achieving efficient thermoelectrics. In this paper, we proposed a two-step process involving femtosecond laser irradiation and ionic liquid (IL) 1-Ethyl-3-MethylImidazolium DiCyAmide treatment to enhance the thermoelectric properties of PEDOT: PSS thin films. This finding revealed that the increase in PEDOT: PSS conductivity was attributed to both laser irradiation and the post-treatment with IL, in which the former enabled the efficient elimination of insulating PSS from the surface of the conductive polymer, the latter further contributed to the decoupling of PEDOT and PSS. The enhanced Seebeck coefficient was due to the ion exchange resulting from IL post-processing, which regulated the PEDOT doping level. By employing laser irradiation and surface treatment with IL, the modified PEDOT:PSS films showed a S of 20.63 μV·K −1 , a σ of 960.7 S·cm −1 , and a power factor (PF) of 40.89 μW·m −1 ·K −2 . Furthermore, a thermoelectric device was developed which can generate a voltage of 0.8 mV at a temperature difference of 11.7 K.
研究领域:
材料科学
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热电学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2015
·
IF 3.827
Zaifang Li,Fei Qin,Tiefeng Liu,Ru Ge,Wei Meng,Jinhui Tong,Sixing Xiong,Yinhua Zhou
We report on conductivity and optical property of three different types of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) films [pristine PH1000 film ( PH1000-p ), with 5 wt.% ethylene glycol additive ( PH1000-EG ) and with sulfuric acid post-treatment ( PH1000-SA )] before and after polyethylenimine (PEI) treatment. The PEI is found to decrease the conductivity of all the PEDOT:PSS films. The processing solvent of 2-methoxyethanol is found to significantly enhance the conductivity of PH1000-p from 1.1 up to 744 S/cm while the processing solvent of isopropanol or water does not change the conductivity of PH1000-p much. As for the optical properties, the PEI treatment slightly changes the transmittance and reflectance of PH1000-p and PH1000-EG films, while the PEI leads to an substantial increase of the absorptance in the spectral region of 400–1100 nm of the PH1000-SA films. Though the optical property and conductivity of the three different types of PEDOT:PSS films vary with the PEI treatment, the treated PEDOT:PSS films exhibit similar low work function. We demonstrate solar cells with a simple device structure of glass/low-WF PEDOT:PSS/P3HT:ICBA/high-WF PEDOT:PSS cells that exhibit good performance with open-circuit voltage of 0.82 V and fill factor up to 0.62 under 100 mW/cm 2 white light illumination.
研究领域:
材料科学
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光电技术
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Food Chemistry-X
·
2023
·
IF 6.1
Tianwen Xu,Li Yang,Xin Zhang,Guo Lu,Zhongchen Bai
A high-sensitivity electrochemical sensor was fabricated via in situ growth of Ag nanoparticles (AgNPs) on the surface of a polypyrrole@poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid (PPy@PEDOT:PSS) film for detecting sodium hydroxymethanesulfinate (SHF) molecules in milk and rice flour samples. The sensor fabrication process involved randomly decorating Ag seed points on the porous PPy@PEDOT:PSS film via a chemical reduction process using a AgNO 3 solution. Next, AgNPs were anchored on the PPy@PEDOT:PSS film surface using an electrochemical deposition method to prepare a sensor electrode. Under optimal conditions, the sensor exhibits a good linear relation within a range of 1–130 ng/mL for real milk and rice flour samples and its limit-of-detection values were up to 0.58 and 0.29 ng/mL, respectively. Additionally, Raman spectroscopy was used to identify the byproducts of the chemical reaction, such as formaldehyde. This AgNP/PPy@PEDOT:PSS film–based electrochemical sensor offers a simple and rapid method for detecting SHF molecules in food products.
研究领域:
分析化学
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食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Xueqin Wang,Jinguo Jiang,Qingqing Zhang,Zhongchen Bai
The Ag/PPy@PEDOT:PSS film was used as a Surface-enhanced Raman scattering (SERs) substrate to directly detect the low concentration of sodium formaldehyde sulfoxylate (SFDS) molecules in solution. We prepared the PPy@PEDOT:PSS film by electrochemical potentiostatic (ECP) method and then directly grew Ag nanoparticles on its surface to prepare the SERs substrate of Ag/PPy@PEDOT:PSS film. The results showed that with the increase of depositional time of Ag nanoparticles, accordingly, the size and density of Ag nanoparticles could be increased on the film surface, and their SERs effect was also enhanced gradually; this SERs substrate could sensitively detect the SFDS molecules in aqueous solution. Moreover, the minimum detection limit was up to 1 ng/mL. This preparing and detecting method of SERs substrates provides a new way for the preparation of high sensitivity SERs substrate and for direct and rapid detection of low concentration of SFDS molecules in food and drug.
研究领域:
材料科学
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分析化学
·
食品安全检测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 12
·1-7
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IF 1.81
He Song,Chang Mengyu,Liu Pengcheng,Wang Xueqin,Bai Zhongchen
We studied a Surface-enhanced Raman scattering (SERs) film by self-assembled deposition of Ag nanoparticles on the surface of PPy@PEDOT:PSS films to detect melamine molecules. The PPy@PEDOT:PSS film was prepared using an electrochemical polymerization method in a mixture solution of PPy and PEDOT:PSS. Then, Ag nanoparticles were directly deposited on the surface of PPy@PEDOT:PSS films by a chemical self-assembly method as an active SERs substrate to detect melamine molecules. The results showed that the density of Ag nanoparticles on the surface of PPy@PEDOT:PSS film was gradually increased due to the increase of depositional time of Ag nanoparticles. Accordingly, The SERs effect was also substantially enhanced. The signal of melamine was increased up to 440 times. The melamine molecules at 6.4 ng/ml concentration could be clearly identified. This preparing method of SERs film and detecting method of melamine molecules provide a new strategy for the design and application of chemical sensors and bio-sensors.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
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