Aryal Krishna Prasad, Jong-Young Park, Soon-Hyung Kang, Kwang-Soon Ahn
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The rGO-WO<sub>3</sub>, possessing 0.1 g of rGO, nanocomposite shows an optimum optical contrast (%ΔT) of 66.3% and excellent optical stability displaying 1.7% degradation in %ΔT, while the WO<sub>3</sub> film only exhibits a %ΔT of 52.2% and, 4.2% of optical degradation. Incorporation of rGO sheet into the WO<sub>3</sub> nanostructure introduces de-agglomerated morphology, enhances electrochemically active surface area, and which facilitates the ion-transfer kinetics. The series-connected QDSSCs results an optimum open circuit voltage (V<sub>oc</sub>) of 1.03 V upon 1 sun illumination, which is found to be adequate for the study of switching performances of ECDs. QDSSCs assisted rGO-WO<sub>3</sub> EC film exhibits a significant %ΔT of 43% and coloration time of 7 s. Additionally, QDSSCs device is illuminated with various light intensities to study the intensity and V<sub>oc</sub> dependent EC performances of rGO-WO<sub>3</sub>.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 6","pages":"756 - 766"},"PeriodicalIF":2.1000,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Electrochromic Performances of rGO-WO3 Thin Film and Its Application as an Integrated Device Powered with Quantum Dot-Sensitized Solar Cells\",\"authors\":\"Aryal Krishna Prasad, Jong-Young Park, Soon-Hyung Kang, Kwang-Soon Ahn\",\"doi\":\"10.1007/s13391-023-00464-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Reduced graphene oxide (rGO)-embedded WO<sub>3</sub> composite thin film (rGO-WO<sub>3</sub>) is synthesized and investigated for its electrochromic performances. Furthermore, a novel application of quantum dot-sensitized solar cells (QDSSCs), to operate the rGO-WO<sub>3</sub> electrochromic devices (ECDs), is demonstrated with development of an integrated device. The co-existence of both WO<sub>3</sub> nanostructure and rGO sheet ameliorates the EC performances of composite thin film, compared to WO<sub>3</sub> thin film. The rGO-WO<sub>3</sub>, possessing 0.1 g of rGO, nanocomposite shows an optimum optical contrast (%ΔT) of 66.3% and excellent optical stability displaying 1.7% degradation in %ΔT, while the WO<sub>3</sub> film only exhibits a %ΔT of 52.2% and, 4.2% of optical degradation. Incorporation of rGO sheet into the WO<sub>3</sub> nanostructure introduces de-agglomerated morphology, enhances electrochemically active surface area, and which facilitates the ion-transfer kinetics. The series-connected QDSSCs results an optimum open circuit voltage (V<sub>oc</sub>) of 1.03 V upon 1 sun illumination, which is found to be adequate for the study of switching performances of ECDs. QDSSCs assisted rGO-WO<sub>3</sub> EC film exhibits a significant %ΔT of 43% and coloration time of 7 s. 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Electrochromic Performances of rGO-WO3 Thin Film and Its Application as an Integrated Device Powered with Quantum Dot-Sensitized Solar Cells
Reduced graphene oxide (rGO)-embedded WO3 composite thin film (rGO-WO3) is synthesized and investigated for its electrochromic performances. Furthermore, a novel application of quantum dot-sensitized solar cells (QDSSCs), to operate the rGO-WO3 electrochromic devices (ECDs), is demonstrated with development of an integrated device. The co-existence of both WO3 nanostructure and rGO sheet ameliorates the EC performances of composite thin film, compared to WO3 thin film. The rGO-WO3, possessing 0.1 g of rGO, nanocomposite shows an optimum optical contrast (%ΔT) of 66.3% and excellent optical stability displaying 1.7% degradation in %ΔT, while the WO3 film only exhibits a %ΔT of 52.2% and, 4.2% of optical degradation. Incorporation of rGO sheet into the WO3 nanostructure introduces de-agglomerated morphology, enhances electrochemically active surface area, and which facilitates the ion-transfer kinetics. The series-connected QDSSCs results an optimum open circuit voltage (Voc) of 1.03 V upon 1 sun illumination, which is found to be adequate for the study of switching performances of ECDs. QDSSCs assisted rGO-WO3 EC film exhibits a significant %ΔT of 43% and coloration time of 7 s. Additionally, QDSSCs device is illuminated with various light intensities to study the intensity and Voc dependent EC performances of rGO-WO3.
期刊介绍：
Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.
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