Enhanced Contrast of Electrochromic Full Cell Systems with Nanocrystalline PEDOT-Prussian Blue

2007 ◽  
Vol 7 (11) ◽  
pp. 4131-4134 ◽  
Author(s):  
Joo-Hee Kang ◽  
Seung-Min Paek ◽  
Young Bin Choy ◽  
Seong-Ju Hwang ◽  
Jin-Ho Choy
Keyword(s):  
Response Time ◽  
Prussian Blue ◽  
Fast Response ◽  
Cell System ◽  
Optical Contrast ◽  
Switching Speed ◽  
Smart Windows ◽  
Coloration Efficiency ◽  
Full Cell ◽  
Ito Glass

Poly-(3,4-ethylenedioxythiophene) (PEDOT) is an ideal polymer for electrochromic (EC) devices due to its fast response time, high conductivity, and facile fabrication in a doped form except its demerit like an optical contrast limitation. In this study, we developed a simple way to overcome low coloration efficiency of PEDOT through fabricating a complementary PEDOT and prussian blue full cell system. Fundamental properties of EC displays, such as optical contrast, coloration efficiency, and switching speed, could be successfully optimized by controlling the deposition time and applied voltage during EDOT polymerization. In particular, UV transmittance spectra indicated that the optical contrast was enhanced up to 31∼99% at the wavelength of 600 nm. Scanning electron microscopy images showed that the optimized PEDOT and prussian blue films were deposited on ITO glass substrate with an uniform thickness of ∼180 nm and ∼190 nm, respectively. Moreover, according to the circuit analysis, the average response time of electric current for the optimized full cell system was about 400 ms. It is, therefore, concluded that such a full cell system could have high potential applications as smart windows and/or optical devices.

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.

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.

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 A Mini-Review: Pyridyl-Based Coordination Polymers for Energy Efficient Electrochromic Application

2021 ◽  
Vol 9 ◽  
Author(s):  
Shiyou Liu ◽  
Ping Zhang ◽  
Jianjian Fu ◽  
Congyuan Wei ◽  
Guofa Cai
Keyword(s):  
Energy Efficient ◽  
High Performance ◽  
Active Material ◽  
Cycling Stability ◽  
Electrochromic Devices ◽  
Switching Speed ◽  
Smart Windows ◽  
Coloration Efficiency ◽  
Fast Switching ◽  
Application Prospects

Electrochromic devices (ECDs) have a broad range of application prospects in many important energy efficient optoelectronic fields, such as smart windows, anti-glare rearview mirrors, low-energy displays, and infrared camouflage. However, there are some factors restricting their development, such as low coloration efficiency, slow switching speed, and poor cycling stability. Coordination polymer (CP) is a promising active material for the fabrication of high-performance ECD because of its ultrahigh coloration efficiency, fast switching speed, and excellent cycling stability. In this review, current advances of CP in energy efficient ECDs are comprehensively summarized and evaluated. Specifically, the effects of composition, coordination bonding, and microstructure of the bipyridine- and terpyridine-based CP on EC performances are introduced and discussed in detail. Then, the challenges and prospects of this booming field are proposed. Finally, the broad application prospects of the CPs-based EC materials and the corresponding devices are also demonstrated, which hold numerous revolutionary effects over our daily life. Hopefully, this review would provide useful guidance and further promote progress on the electrochromic and other optoelectronic fields.

scholarly journals Flexible and high-performance electrochromic devices enabled by self-assembled 2D TiO2/MXene heterostructures

2021 ◽  
Vol 12 (1) ◽  
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

AbstractTransition metal oxides (TMOs) are promising electrochromic (EC) materials for applications such as smart windows and displays, yet the 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 A fast response, self-powered and room temperature near infrared-terahertz photodetector based on a MAPbI3/PEDOT:PSS composite

2020 ◽  
Vol 8 (35) ◽  
pp. 12148-12154 ◽  
Author(s):  
Yifan Li ◽  
Yating Zhang ◽  
Tengteng Li ◽  
Xin Tang ◽  
Mengyao Li ◽  
...  
Keyword(s):  
Response Time ◽  
Room Temperature ◽  
Near Infrared ◽  
Fast Response ◽  
Rapid Response ◽  
Self Powered

A novel self-powered NIR and THz PTE PD based on a (MAPbI3/PEDOT:PSS) composite with a rapid response time of 28 μs.

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