Materials Today Chemistry
·
2026
·
IF 7.4
Jinhao Gao,Lei Xiao,Xiaohong Jiang,Wenliang Zhang,Hanbin Liu,Zhijian Li,Guodong Liu
EMIM TFSI and ethylene glycol reconstruct conductive PEDOT:PSS networks. • EMIM TFSI regulates perovskite wetting and crystallization to suppress defects. • Layer-specific regulation enables high-luminance air-processed PeLECs. Air-processed perovskite light-emitting electrochemical cells (PeLECs) are attractive for solution-processed light emission because of their simple device architecture and mobile-ion-assisted charge injection. However, their performance is still limited by resistive electrode-side charge transport, nonuniform perovskite film formation, and defect-assisted nonradiative recombination under ambient fabrication conditions. Here, we introduce 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) as a multifunctional ionic liquid additive to address losses in both the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) electrode and the perovskite emissive layer. The asymmetric EMIM + /TFSI − ion pair provides distinct ionic and interfacial interactions, enabling layer-dependent regulation of charge transport, film formation, and surface defect environments. In the PEDOT:PSS electrode, ethylene glycol (EG)-assisted EMIM TFSI treatment promotes PEDOT-rich domain enrichment and improves the interconnection of conductive pathways, increasing the conductivity to 4676 S cm −1 while maintaining a visible transmittance of 85.9%. In the perovskite emissive layer, EMIM TFSI improves precursor wetting and regulates nucleation/crystallization processes, leading to smoother, more compact, and more crystalline films. Meanwhile, EMIM TFSI-associated surface regulation modifies the Pb/Br-related local chemical environment, reduces energetic disorder, and suppresses defect-assisted nonradiative recombination, increasing the photoluminescence quantum yield from 54.6% to 66.7%. As a result, the dual-modified air-processed PeLEC achieves a maximum luminance of 3382.6 cd m −2 and a maximum external quantum efficiency of 5.83%. This work demonstrates a multifunctional ionic liquid regulation strategy for coupling electrode conductivity, emissive-layer quality, and electroluminescence output in structurally simplified air-processed PeLECs.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xin-zheng Jin,Zhen-yu Yang,Chen-hui Huang,Jing-hui Yang,Yong Wang
Recently, the miniaturization of microelectronics has proposed a more urgent demand for the multi-functionalization of packaging materials. Here, a PEDOT:PSS/MXene/PEG composite, which is prepared by vertical directional freezing and vacuum infiltrating, integrates the function of heat management & EMI shielding into single packaging material. The melting & cooling enthalpy (237.6 & 236.1 J g −1 ) and the phase transition temperature of composite are enhanced synchronously for the first time. The zigzag modification of polyethylene glycol (PEG) crystal is induced by poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The rest of crystal with (7/2) helix conformation packs preferentially along the (1 2 0) plane. The stability of the melting composite is enhanced. The PEG leakage is less than 0.66 %, and over 80 % dimension is maintained under the pressure of 1.88 kPa. The composite shows excellent photo-thermal (η = 94.9 %) and electro-thermal (t η = 7.86) conversion performances. The EMI shielding mechanism is reflection-dominated and the total EMI shielding effectiveness (SE T ) of composite is 29.8 dB at the framework content as low as 1.22 wt%, which is the relatively low filler content and the highest enthalpy efficiency among the reported composites with the equivalent SE T . The HF-band shielding capability of composite is verified by the Tesla kit. The assembled heterogeneous asynchrony photo-thermal-electric conversion system identifies its potential application on photo-thermal converters and heat buff. The HF-band & X-band (Sub-6G) EM waves shielding and heat management in microelectronics can be achieved simultaneously by applying this composite.
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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.
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Mohamed M. Abdelaal,Mohammad Alkhedher
The energy storage market necessitates an increase in the specific capacity of battery materials, particularly cathodes, to meet growing demands. Manganese (Mn) substitution of lithium iron phosphate (LFP) cathodes presents a promising avenue, offering high specific capacity and operability at elevated voltages. However, during cycling, the dissolution of Fe/Mn ions into the electrolyte leads to capacity fading. In this study, we enhance the specific capacity of LFP by Mn substitution in the iron position at various ratios (0.1, 0.2, 0.3, and 0.4). LiFe 0.6 Mn 0.4 PO 4 exhibits the highest capacity of 159.1 mAh g -1 at 0.1C with an initial Coulombic efficiency of 97.9 %. This improvement stems from an enhanced lithium diffusion coefficient, increasing from 1.86 × 10 –14 cm 2 s -1 for pristine LFP to 2.46 × 10 –12 cm 2 s -1 for LiFe 0.6 Mn 0.4 PO 4 . However, LiFe 0.6 Mn 0.4 PO 4 demonstrates the poorest capacity retention among the substituted samples, reaching 78.4 % over 100 cycles due to severe Fe/Mn ion dissolution. To address this issue, we coat Mn-substituted LFP with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and lithiated Nafion (LN) polymer, which offer high electronic and lithium-ion conductivity, respectively. This coating layer enhances the capacity retention of LiFe 0.6 Mn 0.4 PO 4 to 90.1 % at 0.2C after 100 cycles, effectively mitigating active material loss during charge-discharge processes. This study demonstrates that PEDOT:PSS-LN can improve the electronic and ionic conductivity of cathode materials and maintain high capacity retention during cycling.
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Laser & Photonics Reviews
·
2024
·
IF 9.8
Wei Shen,Yanxing He,Yanfeng Chen,Shuo Chen,Zhihua Chen,Chenxi Liu,Hao Cui,Suyun Liu,Lihui Liu,Gang Cheng,Shufen Chen
Poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is one of the most widely used functional materials for hole transport layer in perovskite light-emitting diode (LED). Tuning its work function (WF) and conductivity (κ) is a key issue for promoting perovskite LED performance. While decreasing its WF always reduces its κ and vice versa. Solving such contradiction is quite significant for promoting the development and commercialization of perovskite LED. Herein, the aniline (Ani) is employed for PEDOT:PSS interface modification. Ani inserted between PEDOT and PSS to weaken electrostatic interaction between sulfonic acid group in PSS chain and thiophene group in PEDOT chain, which results in increased delocalized electrons to enhance its κ. More importantly, the acid–base reaction decreases high acidity of PEDOT:PSS, which is an effective way to increase its WF and decrease its interface defects density. Meanwhile, such interface modification avoids PEDOT:PSS phase separation and ensures the uniformity of film. After Ani modification, the WF of PEDOT:PSS increase from 5.16 to 5.31 eV, the κ increases from 0.30 to 8.62 S cm −1 , and the hole mobility enhances from 0.716 × 10 −6 to 1.306 × 10 −6 cm 2 V −1 s −1 . Modified PEDOT:PSS boost CsPbI 3 LED achieving a maximum external quantum efficiency of 17.70%.
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MACROMOLECULES
·
2026
·
IF 5.2
Qiao Fan,Kai Zhang,Yufei Liu,Lanlan Wei,Yucheng Yin,Tingting Luo,Min He,Chong Chen,Shigui Peng,Jie Yu
High-fidelity bioelectric signal acquisition is crucial for wearable precision medicine, but traditional poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) electrodes struggle to balance conductivity, stretchability, and skin compatibility, particularly under perspiration or physical activity. To address this challenge, we developed a PEDOT-based functional system doped with PSS-co-poly(acrylic acid)/poly(acrylamide) binary copolymers (PSA/PSM). Through multiscale characterization, molecular simulations, and in vitro testing, we systematically investigated the unique roles of carboxyl (−COOH) and amide (−CONH2) groups in regulating microstructure, electrical and interfacial properties, and hydrogen bond network dynamics. Key findings reveal that −COOH groups enhance π-π stacking interactions and charge doping effects in PEDOT. The PSA 3:1 sample exhibits the highest conductivity, surpassing pure PEDOT:PSS, but displays severe swelling and poor adhesion owing to strong electrostatic interactions. In contrast, −CONH2 groups in PSM form a hydrogen bond network with distinct static structural features characterized by uniform bond length and angle distributions and a homogeneous network structure. This optimizes interfacial performance with only a minor conductivity loss (≤10%). The PSM 3:1 electrode demonstrates strong adhesion, low contact impedance (62.8 kΩ at 10 Hz), swelling resistance, and high electromechanical stability. Molecular dynamics simulations confirm that the static structural advantages of the PSM hydrogen bond network, including stable distribution of bonding sites and moderate fluctuations in bond length and angle, are critical to enhancing electromechanical stability and wet performance. In practical electrocardiogram (ECG)/electromyogram (EMG) monitoring, the PSM 3:1 electrode achieves low noise (ECG RMS: 10.3 μV) and high signal fidelity during both resting and exercise states. Under a 25 kg grip force, it reaches an EMG peak-to-peak voltage of 0.32 mV, outperforming commercial Ag/AgCl electrodes. This study provides a molecular-level synergistic multiperformance optimization strategy for conductive polymers, advancing the development of high-fidelity wearable bioelectronics.
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Journal of Physical Chemistry Letters
·
2019
·
IF 7.329
Hebin Wang,Hongyu Chen,Li Li,Yuefei Wang,Longxing Su,Wanpeng Bian,Bingsheng Li,Xiaosheng Fang
A high responsivity self-powered solar-blind deep UV (DUV) photodetector with high rejection ratio was proposed based on inorganic/organic hybrid p–n junction. Owing to the high crystallized β-Ga2O3 and excellent transparent conductive polymer PEDOT:PSS, the device exhibited ultrahigh responsivity of 2.6 A/W at 245 nm with a sharp cutoff wavelength at 255 nm without any power supply. The responsivity is much larger than that of previous solar-blind DUV photodetectors. Moreover, the device exhibited an ultrahigh solar-blind/UV rejection ratio (R245 nm/R280 nm) of 103, which is two orders of magnitude larger than the average value reported in Ga2O3-based solar-blind photodetectors. In addition, the photodetector shows a narrow bandpass response of only 17 nm in width. This work might be of great value in developing a high wavelength selective DUV photodetector with respect to low cost for future energy-efficient photoelectric devices.
研究领域:
光电子学
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半导体器件
·
紫外探测
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材料科学
·
光电探测器
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 13
·7246-7255
·
IF 11.9
Pengju Guo,Jun Dong,Cunyun Xu,Yanqing Yao,Jiayu You,Hongyu Bian,Wenqi Zeng,Guangdong Zhou,Xiaofeng He,Meng Wang,Xianju Zhou,Min Wang,Qunliang Song
Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is widely used as a hole transport layer (HTL) in inverted perovskite solar cells (PSCs) because of its excellent hole transport capability and simple preparation process. According to theoretical studies, a thinner PEDOT:PSS HTL allows more incident light to enter the perovskite layer. However, the PEDOT:PSS HTL prepared by the traditional deposition process has some limitations, such as the thick HTL, abundant defects at the PEDOT:PSS/perovskite interface, etc. Is there a preparation process that can achieve the thinning and modification of the PEDOT:PSS HTL in one-step process at the same time? In this work, inspired by the semiconductor etching process, an eco-friendly solvent etching technique is applied during the spin-coating process to fabricate an ultrathin PEDOT:PSS HTL and simultaneously introduce a green passivator (polyethylene glycol, PEG) as the bridge molecule on the HTL upper surface. In this process, the green PEG aqueous etchant can etch the excess bulk PEDOT:PSS away to form an ultrathin PEDOT:PSS HTL with PEG molecules and rich PEDOT domains remained on its surface (PEG-PEDOT:PSS HTL). This well-designed HTL is successfully thinned to enhance its light transmission and can be better matched with the Sn–Pb perovskite layer. As a result, the power conversion efficiency of Sn–Pb PSCs using the PEG-PEDOT:PSS HTL is improved from 20.52% of the reference to 21.58%, and the stability of Sn–Pb PSCs is dramatically enhanced as well.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-9
·
IF 5.3
Li Yunpeng,Shi Zhuanzhuan,Wu Xiaoshuai,Miao Wenting,Yang Zhengyi,Lou Xinyu,Sun Wei,Guo Chunxian,Li Chang Ming
PEDOT:PSS has been used as a biomimetic uric acid (UA) sensor but suffers from unfortunate low detection limit (LOD), narrow detection range and poor stability. Herein, we get graphdiyne (GDY) marry PEDOT:PSS to create a very stable GDY@PEDOT:PSS heterostructure for a biomimetic UA sensor, which accomplishes the lowest LOD (6 nM), the widest detection range (0.03 μM-7 mM) and the longest stability (98.1% for 35 days) among the related UA sensors. The sensor was successfully used to in situ real-time detection of UA in sweat. The enhancement mechanisms of the sensor were investigated, and results discover that C≡C of GDY and C = C of PEDOT:PSS can cross-link each other by π–π interactions, making not only the former strongly resistant against oxidation deterioration, but also causes the latter to efficiently prevent water swelling of polymer for poor conductivity, thereby leading to high stability from both components. While the stabilized heterostructure can also offer more active sites by enhanced absorption of UA via π-π interactions for highly sensitive detection of UA. This work holds great promise for a practical sweat UA sensor while providing scientific insight to design a stable and electrocatalytically active structure from two unstable components. Graphical abstract
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Ruida Cao,Long Yang,Wenbo Hu,Biao Dong,Hongwei Song,Lin Xu
Underwater communication using triboelectric nanogenerators (TENGs) offers key benefits such as independence from external power sources and immunity to water conditions, but faces challenges like short transmission range and single-mode operation. This study presents a flexible, bifunctional Janus film as a high-performance TENG for long-distance underwater signal transmission. The PEDOT:PSS-doped charge-generating layer minimizes charge dissipation, while the PEDOT:PSS and BaTiO₃ enriched charge-trapping layer enhances retention, ensuring robust performance in both contact and non-contact modes. Dual-mode transmission supports underwater tasks such as wireless switching, communication, charging, and gesture recognition with 94.84% accuracy. Remarkably, gesture signals transmitted over 200 m through a water pipe set a record for Maxwell's displacement current-based communication. Additionally, a smart rescue system demonstrates the non-contact mode's ability to self-power SOS signal transmission through water pipes in emergency scenarios, unaffected by water quality or pipe shape. This work expands TENG applications in self-powered, long-range underwater communication.
研究领域:
能量收集
·
水下无线通信
·
柔性电子学
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自供能传感器
·
人机交互
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Chunyu Zhao,Yidan Wu,Dongxing Song,Shengfu Wei,Yufeng Zhang,Xing Zhang,Weigang Ma
Thermoelectric materials (TEMs) have attracted considerable interest for applications in low-grade energy harvesting, refrigeration, and sensing. Conductive polymers (CPs) represent an important class of TEMs, as they have garnered considerable attention for their dual functionality in facilitating ion transport through channel formation, while simultaneously enabling hole–electron conduction via conjugated networks. However, researchers have overlooked the connection between CP-based ionic thermoelectrics and electronic thermoelectrics. Here, we demonstrate tunable thermoelectric properties achieved exclusively through polymer annealing without any additional substance incorporation. For the PEDOT:PSS/EMIM:DCA composites, a distinct transition from ionic to electronic TEMs was observed for the first time upon annealing above 140 °C. Through comprehensive characterization techniques, we demonstrated that this transition originates from the construction of conductive networks induced by phase separation. Furthermore, by utilizing materials annealed at different temperatures, we constructed a hybrid ionic-electronic thermoelectric converter achieving energy density of 13.99 J m–2, more than 17-fold enhancement compared to a pure ionic thermoelectric converter. This work not only provides fundamental insights into charge transport in CPs but also provides insights into the design of high-performance TEMs.
研究领域:
材料科学
·
热电学
·
聚合物物理
·
能量转换
·
纳米技术
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高影响因子
BIOMACROMOLECULES
·
2025
·
IF 5.4
Rui Liu,Suting Zhou,Meimei Yu,Yumeng Wang,Fen Ran
Flexible supercapacitors have become the top choice for wearable and implantable devices due to their stretchable mechanical adaptability and safety. However, in the current research situation, flexible supercapacitors still face many problems such as insufficient biocompatibility, lack of adhesiveness, or unstable interfaces. In this work, gelatin and polyacrylamide, which possess good biocompatibility, high water retention capacity, and good flexibility, are selected to construct a double-network hydrogel matrix. Tannic acid with abundant catechol groups is added to prepare the gel electrolyte membrane with good mechanical and adhesive properties. A conductive polymer PEDOT:PSS with good biocompatibility and conductivity is polymerized on the upper and lower surfaces of the hydrogel through simple in situ polymerization to form a symmetrically integrated supercapacitor. This device meets the basic requirements of high safety and good biocompatibility for implantable devices. At the same time, it has good adhesive properties, low interfacial impedance, and the characteristics of miniaturization and lightweightedness. This work provides a simple design concept and application potential for the development of wearable and implantable devices.
研究领域:
材料科学
·
储能技术
·
生物医学工程
·
高分子科学
·
电化学
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高影响因子
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