Electrochromic Performances of rGO-WO3 Thin Film and Its Application as an Integrated Device Powered with Quantum Dot-Sensitized Solar Cells

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2023-10-24 DOI:10.1007/s13391-023-00464-x

Aryal Krishna Prasad, Jong-Young Park, Soon-Hyung Kang, Kwang-Soon Ahn

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Abstract

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 (V_oc) 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 V_oc dependent EC performances of rGO-WO₃.

Graphical abstract

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rGO-WO3 薄膜的电致变色性能及其在量子点敏化太阳能电池集成设备中的应用

研究人员合成了还原氧化石墨烯（rGO）-嵌入式 WO3 复合薄膜（rGO-WO3），并对其电致变色性能进行了研究。此外，通过开发一种集成装置，展示了量子点敏化太阳能电池（QDSSC）在操作 rGO-WO3 电致变色装置（ECD）方面的新应用。与 WO3 薄膜相比，WO3 纳米结构和 rGO 薄膜的共存改善了复合薄膜的电致变色性能。含有 0.1 克 rGO 的 rGO-WO3 纳米复合材料的最佳光学对比度（%ΔT）为 66.3%，光学稳定性极佳，%ΔT 降解率仅为 1.7%，而 WO3 薄膜的%ΔT 降解率仅为 52.2%，光学降解率为 4.2%。在 WO3 纳米结构中掺入 rGO 片材，可引入去团聚形态，增加电化学活性表面积，促进离子转移动力学。串联的 QDSSC 在 1 太阳光照射下的最佳开路电压（Voc）为 1.03 V，足以满足研究 ECD 开关性能的需要。QDSSCs 辅助 rGO-WO3 电致发光薄膜显示出 43% 的显著 %ΔT 值和 7 秒的着色时间。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

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.