High performance electrochromic devices based on a polyindole derivative, poly(1H-benzo[g]indole)

2015 ◽  
Vol 3 (43) ◽  
pp. 11318-11325 ◽  
Author(s):  
Guangming Nie ◽  
Ling Wang ◽  
Changlong Liu
Keyword(s):  
Response Time ◽  
High Performance ◽  
Optical Memory ◽  
Fast Response ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Fast Response Time ◽  
Coloration Efficiency ◽  
Long Term Stability

An ECD based on electrochromic poly(1H-benzo[g]indole) was fabricated. The color of this ECD can switch between green and navy blue with good optical contrast, high coloration efficiency, fast response time, better optical memory and long-term stability.

scholarly journals Dual-Cation Electrolytes Crosslinked with MXene for High-Performance Electrochromic Devices

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 874
Author(s):  
Soyoung Bae ◽  
Youngno Kim ◽  
Jeong Min Kim ◽  
Jung Hyun Kim
Keyword(s):  
Ionic Conductivity ◽  
Response Time ◽  
Indium Tin Oxide ◽  
High Performance ◽  
Fast Response ◽  
High Ionic Conductivity ◽  
Electrochromic Device ◽  
Fast Response Time ◽  
Coloration Efficiency ◽  
Conduction Pathway

MXene, a 2D material, is used as a filler to manufacture polymer electrolytes with high ionic conductivity because of its unique sheet shape, large specific surface area and high aspect ratio. Because MXene has numerous -OH groups on its surface, it can cause dehydration and condensation reactions with poly(4-styrenesulfonic acid) (PSSA) and consequently create pathways for the conduction of cations. The movement of Grotthuss-type hydrogen ions along the cation-conduction pathway is promoted and a high ionic conductivity can be obtained. In addition, when electrolytes composed of a conventional acid or metal salt alone is applied to an electrochromic device (ECD), it does not bring out fast response time, high coloration efficiency and transmittance contrast simultaneously. Therefore, dual-cation electrolytes are designed for high-performance ECDs. Bis(trifluoromethylsulfonyl)amine lithium salt (LiTFSI) was used as a source of lithium ions and PSSA crosslinked with MXene was used as a source of protons. Dual-Cation electrolytes crosslinked with MXene was applied to an indium tin oxide-free, all-solution-processable ECD. The effect of applying the electrolyte to the device was verified in terms of response time, coloration efficiency and transmittance contrast. The ECD with a size of 5 × 5 cm2 showed a high transmittance contrast of 66.7%, fast response time (8 s/15 s) and high coloration efficiency of 340.6 cm2/C.

Pyrrolophthalazine dione (PPD)-based donor–acceptor polymers as high performance electrochromic materials

2015 ◽  
Vol 6 (9) ◽  
pp. 1487-1494 ◽  
Author(s):  
Qun Ye ◽  
Wei Teng Neo ◽  
Tingting Lin ◽  
Jing Song ◽  
Hong Yan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
High Performance ◽  
Optical Contrast ◽  
Electrochromic Materials ◽  
Coloration Efficiency ◽  
Term Stability ◽  
Long Term Stability ◽  
Donor Acceptor ◽  
Solution Processable

Novel solution-processable pyrrolophthalazine dione-containing electrochromic conjugated polymers with high optical contrast, high coloration efficiency, and good long-term stability were reported.

High-performance humidity sensors from Ni(SO4)0.3(OH)1.4 nanobelts

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6521-6525 ◽  
Author(s):  
Ming Zhuo ◽  
Yuejiao Chen ◽  
Tao Fu ◽  
Haonan Zhang ◽  
Zhi Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Humidity Sensors ◽  
Term Stability ◽  
Long Term Stability

Ni(SO4)0.3(OH)1.4 nanobelts are utilized in a humidity sensor by a facile method. The nanobelt based sensor shows a high sensitivity, fast response and long-term stability in the sensing process.

scholarly journals Flexible and High-Performance Electrochromic Devices Enabled by Self-Assembled 2D TiO2/MXene Heterostructures

2020 ◽  
Author(s):  
Ran Li ◽  
Xiaoyuan Ma ◽  
Jianmin Li ◽  
Jun Cao ◽  
Hongze Gao ◽  
...  
Keyword(s):  
Transition Metal Oxides ◽  
High Performance ◽  
Transparent Electrode ◽  
Fast Response ◽  
Electrochromic Devices ◽  
Large Area ◽  
Smart Windows ◽  
Coloration Efficiency ◽  
Flexible Devices ◽  
Self Assembled

Abstract Transition metal oxides (TMO) are promising electrochromic (EC) materials for applications such as smart windows and displays, yet challenge still exists to achieve good flexibility, high coloration efficiency and fast response simultaneously. MXenes (e.g. Ti3C2Tx) and their derived TMOs (e.g. 2D TiO2) are good candidates for high-performance and flexible EC devices because of their 2D nature and the possibility of assembling them into loosely networked structures. Here we demonstrate flexible, fast, and high-coloration-efficiency EC devices based on self-assembled 2D TiO2/Ti3C2Tx heterostructures, with the Ti3C2Tx layer as the transparent electrode, and the 2D TiO2 layer as the EC layer. Benefiting from the well-balanced porosity and connectivity of these assembled nanometer-thick heterostructures, they present fast and efficient ion and electron transport, as well as superior mechanical and electrochemical stability. We further demonstrate large-area flexible devices which could potentially be integrated onto curved and flexible surfaces for future ubiquitous electronics.

scholarly journals High-performance non-enzymatic glucose detection: using a conductive Ni-MOF as an electrocatalyst

2020 ◽  
Vol 8 (25) ◽  
pp. 5411-5415 ◽  
Author(s):  
Yanxia Qiao ◽  
Qian Liu ◽  
Siyu Lu ◽  
Guang Chen ◽  
Shuyan Gao ◽  
...  
Keyword(s):  
Detection Limit ◽  
Response Time ◽  
Blood Serum ◽  
High Performance ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Glucose Detection ◽  
Serum Samples ◽  
Fast Response Time

A glucose sensor based on a conductive Ni-MOF as an electrocatalyst exhibits a fast response time, low detection limit, and high sensitivity, and it can also be applied for the detection of glucose in blood serum samples.

scholarly journals High Sensitivity Flexible Electronic Skin Based on Graphene Film

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 794 ◽  
Author(s):  
Xiaozhou Lü ◽  
Jiayi Yang ◽  
Liang Qi ◽  
Weimin Bao ◽  
Liang Zhao ◽  
...  
Keyword(s):  
Response Time ◽  
Graphene Film ◽  
High Sensitivity ◽  
Middle Layer ◽  
Fast Response ◽  
Long Term Stability ◽  
Electronic Skin ◽  
Flexible Electronic ◽  
Object Based

Electronic skin with high sensitivity, rapid response, and long-term stability has great value in robotics, biomedicine, and in other fields. However, electronic skin still has challenges in terms of sensitivity and response time. In order to solve this problem, flexible electronic skin with high sensitivity and the fast response was proposed, based on piezoresistive graphene films. The electronic skin was a pressure sensor array, composed of a 4 × 4 tactile sensing unit. Each sensing unit contained three layers: The underlying substrate (polyimide substrate), the middle layer (graphene/polyethylene terephthalate film), and the upper substrate bump (polydimethylsiloxane). The results of the measurement and analysis experiments, designed in this paper, indicated that the flexible electronic skin achieved a positive resistance characteristic in the range of 0 kPa–600 kPa, a sensitivity of 10.80 Ω /kPa in the range of 0 kPa–4 kPa, a loading response time of 10 ms, and a spatial resolution of 5 mm. In addition, the electronic skin realized shape detection on a regular-shaped object, based on the change in the resistance value of each unit. The high sensitivity flexible electronic skin designed in this paper has important application prospects in medical diagnosis, artificial intelligence, and other fields.

Synthesis and characterization of donor–acceptor type conducting polymers containing benzotriazole acceptor and benzodithiophene donor or s-indacenodithiophene donor

RSC Advances ◽  
2016 ◽  
Vol 6 (96) ◽  
pp. 94014-94023 ◽  
Author(s):  
Di Zhang ◽  
Min Wang ◽  
Xiaoli Liu ◽  
Jinsheng Zhao
Keyword(s):  
Conducting Polymers ◽  
Response Time ◽  
Fast Response ◽  
Synthesis And Characterization ◽  
Fast Response Time ◽  
Coloration Efficiency ◽  
Donor Acceptor

Two D–A type copolymers were synthesized and characterized by a series of methods. Both copolymers showed high optical contrasts, fast response time and high coloration efficiency. In summary, they could be candidates for electrochromic applications.

scholarly journals Electrodeposited Copolymers Based on 9,9′-(5-Bromo-1,3-Phenylene)Biscarbazole and Dithiophene Derivatives for High-Performance Electrochromic Devices

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1136
Author(s):  
Chung-Wen Kuo ◽  
Jui-Cheng Chang ◽  
Jeng-Kuei Chang ◽  
Sheng-Wei Huang ◽  
Pei-Ying Lee ◽  
...  
Keyword(s):  
High Performance ◽  
Electrochemical Polymerization ◽  
Fast Response ◽  
Electrochromic Device ◽  
Benzene Derivative ◽  
Electrochromic Devices ◽  
Coloration Efficiency ◽  
Optical Circuit ◽  
Transmittance Change ◽  
Grey Iron

A 1,3-bis(carbazol-9-yl)benzene derivative (BPBC) was synthesized and its related homopolymer (PBPBC) and copolymers (P(BPBC-co-BT), P(BPBC-co-CDT), and P(BPBC-co-CDTK)) were prepared using electrochemical polymerization. Investigations of polymeric spectra showed that PBPBC film was grey, iron-grey, yellowish-grey, and greyish-green from the neutral to the oxidized state. P(BPBC-co-BT), P(BPBC-co-CDT), and P(BPBC-co-CDTK) films showed multicolor transitions from the reduced to the oxidized state. The transmittance change (DT) of PBPBC, P(BPBC-co-BT), P(BPBC-co-CDT), and P(BPBC-co-CDTK) films were 29.6% at 1040 nm, 44.4% at 1030 nm, 22.3% at 1050 nm, and 41.4% at 1070 nm. The coloration efficiency (η) of PBPBC and P(BPBC-co-CDTK) films were evaluated to be 140.3 cm2 C−1 at 1040 nm and 283.7 cm2 C−1 at 1070 nm, respectively. A P(BPBC-co-BT)/PEDOT electrochromic device (ECD) showed a large DT (36.2% at 625 nm) and a fast response time (less than 0.5 s), whereas a P(BPBC-co-CDTK)/PEDOT ECD revealed a large η (534.4 cm2 C–1 at 610 nm) and sufficient optical circuit memory.

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