THIN SOLID FILMS
·
2023
·
IF 2.1
Liang Zhao,Xiaozhe Cheng,Weizhen Xia,Lingling Yao,Zhitao Dou,Haibin Xue,Hong Lian,Yongquan Qu,Qingchen Dong
In this work, we designed and synthesized two bipolar host materials, DBTPC1 and DBTPC2 through different linkage ways between carbazole, pyridine and dibenzothiophene. The photophysical properties and thermal properties of these hosts were systematically investigated. Their rigid molecular structures result in high glass transition temperatures , contributing to excellent thermal stability of molecules. Employing DBTPC1 and DBTPC2 as hosts, red phosphorescent organic light-emitting devices (PHOLEDs) with Ir(piq) 2 acac as an emitter display maximum external quantum efficiencies (EQEs) of 18.8 and 13.2%, respectively. The experimental results reveal that DBTPC1 shows better performance than commercial host 4,4’-bis(carbazol-9-yl)biphenyl (CBP), thus, would be a promising host material for practical application in red PHOLEDs and for the future exploration in multi-color PHOLEDs.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Maoxin Zhang,Ruijuan Liao,Ao Zhang,Yi Fang,Xiaoli Song,Mingsi Xie,Chunxiu Zhang,Yuwen Feng,Haifeng Yu
A series of novel discotic liquid-crystalline donor–acceptor dyads (D-A) adjusted by changing the chain length of diester groups on perylene were synthesized based on triphenylene and perylene units which linked by a flexible linkage of 9-nonyloxy-1-amine. The mesomorphism properties and their self-assembly behaviors were studied by differential scanning calorimetry, polarized optical microscopy, one-dimensional wide-angle X-ray diffraction, small angle X-ray scattering and two-dimensional wide-angle X-ray diffraction. Charge carrier mobilities were measured by Time-of-flight device. These discotic liquid crystalline compounds exhibited highly efficient ambipolar charge-transport properties and the charge carrier mobility can reach the order of 10 −4 cm 2 v −1 s −1 by segregated donor–acceptor columns, providing potential utility of the strategy in organic optoelectronic applications.
研究领域:
材料科学
·
有机光电
✓ 已验证
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Mingxing Zhao,Wei Xia,Yang Wang,Man Luo,Zhen Tian,Yanfeng Guo,Weida Hu,Jiamin Xue
Two-dimensional (2D) materials with narrow band gaps (∼0.3 eV) are of great importance for realizing ambipolar transistors and mid-infrared (MIR) detections. However, most of the 2D materials studied to date have band gaps that are too large. A few of the materials with suitable band gaps are not stable under ambient conditions. In this study, the layered Nb2SiTe4 is shown to be a stable 2D material with a band gap of 0.39 eV. Field-effect transistors based on few-layer Nb2SiTe4 show ambipolar transport with a similar magnitude of electron and hole current and a high charge-carrier mobility of ∼100 cm2 V–1 s–1 at room temperature. Optoelectronic measurements of the devices show clear response to an MIR wavelength of 3.1 μm with a high responsivity of ∼0.66 AW–1. These results establish Nb2SiTe4 as a good candidate for ambipolar devices and MIR detection.
研究领域:
材料科学
·
电子工程
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 19
·e202300658
·
IF 8.4
Yanrong Wang,Shigui Qiu,Dunyong He,Jiandong Guo,Mengfan Zhao,Chenxi Zheng,Xuemei Wang,Caixing Wang
Graphical A novel molecule (PTDM) containing n-type and p-type redox sites was prepared. By exploiting the synergistic advantages of two-type redox sites of PTDM, the aqueous PTDM//Zn cell delivers a high average voltage of ~1.13 V, a decent specific capacity of 118.3 mAh g −1 at 0.1 A g −1 and moderate capacity retention of 65.6 % over 6400 cycles at 1 A g −1 . Aqueous zinc ion batteries (AZIBs) are gaining popularity as advanced energy storage devices that are economical, safe, and use resource-abundant storage options. In this study, we have synthesized a bipolar phenothiazine organic scaffold known as 3,7-bis(melaminyl)phenothiazin-5-ium iodide (PTDM), which is obtained by undergoing nucleophilic substitution through phenothiazinium tetraiodide hydrate (PTD) and melamine. Electrochemical results indicate that PTDM can act as a high-potential cathode material for rechargeable AZIBs. In detail, the aqueous PTDM//Zn full cell exhibits a high average voltage of approximate 1.13 V, along with a specific capacity of 118.3 mAh g −1 at 0.1 A g −1 . Furthermore, this demonstrated cell displays moderate long-term cycling stability over 6400 cycles, which is encouraging and suggests potential for developing advanced organic electrode materials for rechargeable AZIBs.
研究领域:
化学
·
能源材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2013
·Vol. 25
·期 40
·5762-5766
·
IF 14.829
Congcheng Fan,Arjan P. Zoombelt,Hao Jiang,Weifei Fu,Jiake Wu,Wentao Yuan,Yong Wang,Hanying Li,Hongzheng Chen,Zhenan Bao
Graphical Organic single-crystalline p-n junctions are grown from mixed solutions. First, C 60 crystals (n-type) form and, subsequently, C8-BTBT crystals (p-type) nucleate heterogeneously on the C 60 crystals. Both crystals continue to grow simultaneously into single-crystalline p-n junctions that exhibit ambipolar charge transport characteristics. This work provides a platform to study organic single-crystalline p-n junctions.
研究领域:
材料科学
·
电子工程
·
有机半导体
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Siyuan Zhao,Tong Liu,Yawen Dai,Yang Wang,Zengjia Guo,Shuo Zhai,Jie Yu,Chunyi Zhi,Meng Ni
The low operating voltage of 1.4 V limits the widespread application of flexible Zn-air batteries (ZABs) in wearable electronics. However, a high-voltage flexible ZAB has not been achieved yet, which results from the few choices of fitted flexible electrolytes. Now we propose a novel, universal, and simple strategy to design all-in-one and membrane-free acid-alkaline flexible electrolytes based on thermo-reversible Pluronic® F127 hydrogels. Benefiting from the unique sol–gel transition property of Pluronic® F127 hydrogel, the acid and alkaline can be decoupled but integrated simultaneously in one hydrogel. Surprisingly, the as-developed ZAB achieves an unprecedentedly high voltage of 2 V, surpassing all the existing flexible ZABs. Meanwhile, this battery exhibits remarkable high-voltage stability of 37 h and a large area capacity of 1.35 mAh cm −2 without the use of costly bipolar membranes. Our work presents a pioneering example for flexible high-voltage ZAB and may further inspire other designs of flexible high-voltage aqueous batteries and decoupled dual-electrolyte batteries.
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2017
·
IF 3.473
Qingchen Dong,Feifei Tai,Hong Lian,Zheng Chen,Mingming Hu,Jinhai Huang,Wai-Yeung Wong
Two bipolar host materials H1 ( N -linked carbazole) and H2 ( C-3 -linked carbazole) via changing the substitution position of triazine and carbazole moieties are reported. Their structural and physical properties were fully characterized. The thermal analysis demonstrated that both H1 and H2 are of high thermal stability. The triplet energy levels of H1 and H2 were determined to be 2.64 and 2.7 eV, respectively. Both green and blue OLEDs with H1 and H2 acting as host materials were fabricated to investigate their performances in PHOLED . The green PHOLED based on H1 exhibits the best performance with the maximum current efficiency, maximum power efficiency and maximum brightness of 51.7 cd/A, 37.8 lm/W and 132800 cd/m 2 , respectively, while the blue PHOLED based on H2 shows the best performance with the maximum current efficiency, maximum power efficiency and maximum brightness of 21.6 cd/A, 17.2 lm/W and 16640 cd/m 2 , respectively. The characteristic measurements of OLED devices reveal that both H1 and H2 are promising host materials for practical application. By comparing the commercial host materials of 4,4’-bis(carbazol-9-yl)biphenyl (CBP) and N,N-dicarbazoyl-3,5-benzene (mCP), the power efficiencies of green and blue PHOLED were boosted by 22.3% and 75.5%, respectively.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Yanrong Wang,Shigui Qiu,Shengwen Tan,Huaizhu Wang,Xuemei Wang,Chenxi Zheng,Lubin Ni,Guowang Diao,Caixing Wang,Zhong Jin
To synergistically combine the features of high specific capacity of n-type organic materials with the high voltage of p-type organic materials, bipolar phenolthiazine-based cathodes with p-type/n-type structures are gaining increased attention for aqueous zinc-ion batteries (AZIBs). Nevertheless, their small molecular structure often leads to dissolution during cycling. To address the challenge, a bipolar poly(phenothiazine iodide-3,3′-diaminobenzidine), abbreviated as P(PTD-DAB), was synthesized as a cathode material. Through comprehensive spectroscopic analyses, we elucidated a cooperative p-type/n-type dual-ion storage mechanism. Specifically, the N atom in the phenothiazine core stores Zn2+ or H+ cations via n-type reactions, while the N atoms connecting phenothiazinium tetraiodide and 3,3′-diaminobenzidine monomers, along with S atoms, act as p-type active sites for storing OTF– anions. The material delivers an average operating voltage of 1 V and achieves a high specific capacity of 211.8 mAh g–1 at a low current density of 0.1 A g–1. Additionally, it shows 90% capacity over 3600 cycles at a high current density of 3 A g–1 while sustaining robust stability at a high mass loading of active cathode (10 mg cm–2). Furthermore, flexible belt-shaped cells maintain 88% capacity retention over 550 cycles at 3 A g–1 even when subjected to repeated bending conditions. This work represents a great advancement in developing bipolar polymers for high-performance AZIBs and offers valuable insights into their design principle and functionality.
研究领域:
材料科学
·
电化学
·
有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Jiakun An,Gaoyu Chen,Xia Zhu,Xin Lv,Jianchun Bao,Xiangxing Xu
All-inorganic perovskite CsPbX3 (X = Cl, Br, and I) quantum dots (QDs) are emerging as attractive materials for photodetectors due to their prominent positive photoresponse. In this work, ambipolar photodetectors were constructed based on heterojunctions of CsPbX3 QDs and ZnO nanocrystals (NCs). The transition between the positive photoconductivity (PPC) and negative photoconductivity (NPC) was successfully controlled not only by the drain-source voltage (VDS) but also by the excitation wavelength and CsPbX3 crystal size. A high responsivity (R), on–off ratio (η), and detectivity (D*) were achieved for NPC (R = 1046 mA/W, η = 281, and D* = 1.65 × 1011 Jones), with PPC (R = 146 mA/W, η = 64, and D* = 1.54 × 1011 Jones) simultaneously revealed in the same device. A general mechanism combining the type-II heterojunction, the component and size-related band structure, and most critically the in-band trap states of the perovskites was established for understanding the unique ambipolar property. It exhibits application potential in developing functional photodetectors, memristors, and optical logic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Dinghui Chen,Xiaopeng Zhang,Hong Xu,Meng Wang,Meimei Zhu,Menghong Yang,Qiang Zhu,Yaowu He,Zhenguo Liu,Jianwei Xu,Hong Meng
This work reports the synergistic effect of dual polar (triethylene glycol and ester) side chains in enhancing the electrochromic devices (ECDs) performance of conjugated polymers. By using dual polar side chains instead of alkyl side chains, the cyclic stability of ECDs (PFS-2) achieved an enhancement of more than 1600%, the coloring time was shortened by 58%, coloration efficiency increased by 57%, and the driving voltage was reduced by 25%. This synergistic effect is attributed to the dual polar side chains, which help facilitate charge transport and enhance ion diffusion rates, thereby creating favorable conditions for ion movement. The concept of synergistic promotion of ionic conductivity of conjugated polymers by dual polar side chains has been proposed, paving new pathways for further enhancing the performance of conjugated polymers. This research offers new perspectives on designing materials for advanced ECDs and suggests ways to enhance conjugated polymers for use in adaptive camouflage.
研究领域:
材料科学
·
化学工程
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hongjie Yu,Wenke Liu,Shaojian Jiang,Yuhang Liu,Ruidong Yang,Lijun Zhang,Kai Deng,Hongjing Wang,Liang Wang
Green hydrogen production technology is an effective strategy for solving energy problems and environmental issues. In this paper, we report a bipolar hydrogen production system: Au–CuxO/CF∥Ru–CuxO/CF, in which the cathode produces hydrogen through the hydrogen evolution reaction (HER) process and the anode produces hydrogen through a formaldehyde oxidation reaction (FOR). It is found that when Au–CuxO/CF is used in FOR, the C–H bond of formaldehyde will be broken at low potential to produce reactive hydrogen H*. H* is recombined through the Tafel step (H* + H* ⇌ H2) to produce H2. At the same time, the formaldehyde is oxidized to a high-value-added product HCOOH. We found that the formation of grain boundary-rich structures on the Au–CuxO surface jointly promotes the oxidation of formaldehyde at low potentials. In addition, we introduced Ru elements into CuxO to enhance the cathodic HER. The FOR-HER system of Au–CuxO/CF∥Ru–CuxO/CF was tested in a flow cell. It produced a current density of 500 mA cm–2 at a potential of only 0.38 V. This work provides system construction and catalyst design ideas for bipolar hydrogen production at low voltages.
研究领域:
能源化学
·
催化科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Electronic Materials
·
2025
·
IF 5.3
Wenwen Wang,Yao Li,Jiangdong Zhang,Menghan Chen,Jia Liu,Jiahao Kang,Jinjin Zhao
Optoelectronic modulated transistors based on organic–inorganic halide perovskites can perceive and parse visual information, making them appealing for neuromorphic computing or future vision automation owing to their abundant and tunable optoelectronic properties, high quantum efficiency, and large specific surface area. Herein, quasi-2D (ThMA) 2 (MA) n-1 Pb n I 3n+1 ( n = 4) transistor exhibits n/p-type ambipolar transport characteristics. The remarkable hysteresis behavior observed in the transfer characteristics can be modulated by external voltages and illumination. The ambipolar quasi-2D (ThMA) 2 (MA) n-1 Pb n I 3n+1 ( n = 4) transistor exhibits maximum charge mobility under light illumination with hole mobility ( µ h ) of ≈1.5 × 10 −4 cm 2 V −1 s −1 (≈167 times higher than that in the dark condition), threshold voltage ( V th ) of 2.1 V, and subthreshold swing ( SS ) of 3.4 V decade −1 for the p-channel mode, and electron mobility ( µ e ) of ≈1.9 × 10 −4 cm 2 V −1 s −1 , V th of 3.1 V, and SS of 1.7 V decade −1 for the n-channel mode, respectively. The effects of light illumination on the potentiation and depression properties of the proposed device are discussed. The Chinese handwritten characters from the Institute of Automation of the Chinese Academy of Sciences are used to simulate the image recognition properties. The quasi-2D perovskite offers a new platform for the development of optoelectronic neuromorphic systems and bionic vision.
研究领域:
材料科学
·
电子工程
·
光学
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）