Electrochromics for smart windows: Oxide-based thin films and devices

2014 ◽  
Vol 564 ◽  
pp. 1-38 ◽  
Author(s):  
Claes G. Granqvist
Keyword(s):  
Thin Films ◽  
Smart Windows

scholarly journals Strong texture tuning along different crystalline directions in glass-supported CeO2 thin films by ultrasonic spray pyrolysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Inti Zumeta-Dubé ◽  
José Manuel García Rangel ◽  
Jorge Roque ◽  
Issis Claudette Romero-Ibarra ◽  
Mario Fidel García Sánchez
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Morphological Characteristics ◽  
Ultrasonic Spray Pyrolysis ◽  
Cost Effective ◽  
Growth Direction ◽  
Large Area ◽  
Smart Windows ◽  
Ultrasonic Spray

AbstractThe strong facet-dependent performance of glass-supported CeO2 thin films in different applications (catalysis, smart windows, etc.) has been the target of diverse fundamental and technological approaches. However, the design of accurate, cost-effective and scalable methods with the potential for large-area coverage that produce highly textured glass-supported CeO2 thin films remains a technological challenge. In the present work, it is demonstrated that under proper tuning conditions, the ultrasonic spray pyrolysis technique enables one to obtain glass-supported polycrystalline CeO2 films with noticeable texture along both the (100) and (111) directions, as well as with randomly oriented crystallites (no texture). The influence of flow rates, solution molarity, and substrate temperature on the texture and morphological characteristics, as well as optical absorption and Raman response of the deposited films, is evaluated. The obtained results are discussed on the basis of the combined dependence of the CeO2-exposed surfaces on the thermodynamic stability of the corresponding facets and the reaction kinetics, which modulate the crystallite growth direction.

scholarly journals Electrochromic Devices Based on Porous Tungsten Oxide Thin Films

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Y. Djaoued ◽  
S. Balaji ◽  
R. Brüning
Keyword(s):  
Thin Films ◽  
Transition Metal Oxides ◽  
Structural Phase ◽  
Phase Changes ◽  
Optical Modulation ◽  
Electrochromic Devices ◽  
Smart Windows ◽  
Porous Thin Films ◽  
Recent Developments ◽  
Ion Intercalation

Recent developments in the synthesis of transition metal oxides in the form of porous thin films have opened up opportunities in the construction of electrochromic devices with enhanced properties. In this paper, synthesis, characterization and electrochromic applications of porous WO3thin films with different nanocrystalline phases, such as hexagonal, monoclinic, and orthorhombic, are presented. Asymmetric electrochromic devices have been constructed based on these porous WO3thin films. XRD measurements of the intercalation/deintercalation of Li+into/from the WO3layer of the device as a function of applied coloration/bleaching voltages show systematic changes in the lattice parameters associated with structural phase transitions in LixWO3. Micro-Raman studies show systematic crystalline phase changes in the spectra of WO3layers during Li+ion intercalation and deintercalation, which agree with the XRD data. These devices exhibit interesting optical modulation (up to ~70%) due to intercalation/deintercalation of Li ions into/from the WO3layer of the devices as a function of applied coloration/bleaching voltages. The obtained optical modulation of the electrochromic devices indicates that, they are suitable for applications in electrochromic smart windows.

Manipulation of optical and electrical properties of ZnO thin films via embedded nano structure

2018 ◽  
Vol 32 (19) ◽  
pp. 1840039 ◽  
Author(s):  
Dongyan Zhang ◽  
Ri-Ichi Murakami
Keyword(s):  
Thin Films ◽  
Optical Transmittance ◽  
Wide Bandgap ◽  
Nano Particles ◽  
Zno Thin Films ◽  
Nano Structure ◽  
Smart Windows ◽  
Conducting Oxides ◽  
Band Engineering ◽  
Metal Nano Particles

The semiconductor ZnO has gained great interest in the past decades because of its wide bandgap and large exciton binding energy. Especially, the doping and embedded metal nano-particles methods could improve the conductivity of ZnO thin films, which made it possible to fabricate transparent conducting oxides based on ZnO. In the present study, Al-doped ZnO thin layer was employed to manipulate the electrical and optical properties. The band engineering in ZnO makes it possible to manipulate the absorption, emission, reflection spectral of ZnO via the embedded quantum well layer. The ZnO thin films with excellent performance in electrical conductivity and optical transmittance are promising to be applied in the devices including the lager flat screen, touch panel, portable digital device and smart windows. In the present study, we summarized the recent progress in ZnO with embedded metal nanoparticles and application in TCOs.

Synthesis of hierarchical WO3 nanostructured thin films with enhanced electrochromic performance for switchable smart windows

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96416-96427 ◽  
Author(s):  
S. Poongodi ◽  
P. Suresh Kumar ◽  
Yoshitake Masuda ◽  
D. Mangalaraj ◽  
N. Ponpandian ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphical Representation ◽  
Smart Windows ◽  
Electrodeposition Method ◽  
Nanostructured Thin Films

Graphical representation of synthesis of hierarchical WO3 nanostructured thin films via electrodeposition method.

Oxide-Based Electrochromics: Advances in Materials and Devices

2011 ◽  
Vol 1328 ◽  
Author(s):  
C. G. Granqvist ◽  
İ. Bayrak Pehlivan ◽  
S. V. Green ◽  
P. C. Lansåker ◽  
G. A. Niklasson
Keyword(s):  
Thin Films ◽  
Energy Efficiency ◽  
Solar Energy ◽  
Visible Light ◽  
Metal Oxides ◽  
Well Being ◽  
Mixed Metal Oxides ◽  
Smart Windows ◽  
Electrical Conductors ◽  
Device Technology

ABSTRACTElectrochromic (EC) devices are able to vary their throughput of visible light and solar energy by the application of a voltage. They are of much interest for “smart” windows in buildings and are able to create energy efficiency, occupant well being, and security. This paper gives a survey over oxide-based EC device technology and also presents some recent advances regarding EC thin films of mixed metal oxides, nanoparticle-containing electrolytes to join these films, and metal-based transparent electrical conductors needed to apply the voltage.

High thermochromic performance of Fe/Mg co-doped VO2 thin films for smart window applications

2018 ◽  
Vol 6 (24) ◽  
pp. 6502-6509 ◽  
Author(s):  
Chunhui Ji ◽  
Zhiming Wu ◽  
Lulu Lu ◽  
Xuefei Wu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
New Method ◽  
Smart Window ◽  
Smart Windows ◽  
Practical Applications ◽  
Co Doping ◽  
Window Applications ◽  
Vo2 Thin Films ◽  
First Time ◽  
Co Doped

A new method, Fe/Mg co-doping, is proposed for the first time to optimize thermochromic VO2 and the promising performance of VO2-based smart windows for practical applications is successfully achieved.

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