Tungsten Trioxide Doped with CdSe Quantum Dots for Smart Windows

Abstract

Nanocrystal quantum dots (QDs) provide tunable optoelectronic properties on the basis of their dimension. CdSe QDs, which are size-dependent colloidal nanocrystals, are used for efficient electrochromic devices owing to their unique properties in modulating quantum confinement, resulting in enhanced electron insertion during the electrochromic process. Incorporating a well-known metal oxide electrochromic material such as WO 3 into CdSe QDs enhances the redox process. Herein, we propose a facile method for producing and optimizing CdSe QDs doped in WO 3 . The fabrication of the electrochromic film involves a solution and annealing process. Moreover, the effect of the QD size to optimize the electrochromic layer is studied. As a result, the coloration efficiency of WO 3 and optimized CdSe QD− WO 3 are obtained as 68.6 and 112.3 cm 2 /C, respectively. Thus, size-tunable nanocrystal QDs combined with a metal oxide yield high-performance electrochromic devices and are promising candidates for producing smart windows.

Advanced developments in nonstoichiometric tungsten oxides for electrochromic applications

“…For conducting thin-film technology, the capability to introduce these carriers is necessary, as published tin-doped indium oxide (ITO), 317 aluminum-doped zinc oxide (AZO), 318 indium-doped cadmium oxide (ICO), 319 and niobiumdoped anatase titania. 320 Hasani et al 321 have doped CdSe quantum dots with WO 3 nanocrystals by wet-synthesis followed by annealing. The optimized CdSe QD-doped WO 3…”

Bionic smart recycled paper endowed with amphiphobic, photochromic, and UV rewritable properties

“…It is an indirect semiconductor with photochromic properties 14,15 and is commonly used to prepare catalysts, coatings, and reproof materials. [16][17][18][19][20] So far, articially prepared TT and other smart semiconductors have been reported to show a variety of morphologies such as nanowires, nanotubes, nanoakes, nanospheres, nanosheets, coral-like nanostructures, etc. 16,[21][22][23][24][25] Their main preparation methods include the hydrothermal method, 14,21 solvothermal method, 26,27 template-assisted method, 24 etc.…”

Research Impact on Emerging Quantum Materials for Electrochromic Applications

“…In particular, in the ECDs, the interfacial interactions of the EC materials with the electrolyte provide unobstructed ion channels, improve electron conduction, and shorten ion diffusion distance, all of which significantly affect the EC performances . Recently, several papers using quantum dots (QDs) as next‐generation EC materials have been published . The EC behavior of QDs can be attributed to size‐dependent optoelectronic properties to cause the collection of electrons in the conduction band and electron injection and optical transitions of surface energy states during the electrochemical reaction .…”

“…[9] The EC behavior of QDs can be attributed to size-dependent optoelectronic properties to cause the collection of electrons in the conduction band and electron injection and optical transitions of surface energy states during the electrochemical reaction. [9] It this respect, it should be noted that the overall understanding of nanostructuring of EC materials is essential for the development of the ECDs. Therefore, in the present study, we will discuss representative samples that include the content of highperformance ECDs using from various nanostructures to QDs.…”

“…Recently, several papers using quantum dots (QDs) as next‐generation EC materials have been published . The EC behavior of QDs can be attributed to size‐dependent optoelectronic properties to cause the collection of electrons in the conduction band and electron injection and optical transitions of surface energy states during the electrochemical reaction . It this respect, it should be noted that the overall understanding of nanostructuring of EC materials is essential for the development of the ECDs.…”