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Study on the optical properties and electrochromic applications of LTO/TaOx ion storage-transport composite structure films

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Abstract

In this paper, the morphological and optical properties of LTO/TaOx composite structure films and electrochromic properties of “ITO/NiOx/LTO/TaOx/WOx/ITO” electrochromic devices (ECDs) based on LTO/TaOx composite structure films are reported. The composite films are deposited on the ITO substrate by reactive magnetron sputtering. The results of XRD, SEM, and AFM show that LTO film is amorphous and the performance of films prepared by sputtering power of 100 W for 5 h is the best. The optical transmittance of the multilayer structure is tested using an ultraviolet-visible spectrum and the refractive index dispersion is calculated using the relationship between the peaks in the spectrum based on equal inclination interference theory. Optical transmittance and refractive index dispersion are changed with the increase of magnetron sputtering power. Electrochromic tests show that all-solid-state ECDs based on composite films have 13 s coloring and 14 s fading response time, and the average optical modulation amplitude is 58%.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 51602045), the Fundamental Research Funds for the Central Universities (Grant No. N162304013), and the Natural Science Foundation of Hebei Province (Grant No. E2017501082), Natural Science Foundation of Liaoning Province (No.20170540325).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, People’s Republic of China

    Boyu Wang, Xiaoqiang Wang, Mingya Li, Junfei Hou & Renfu Zhang

  2. Key Laboratory of Dielectric and Electrolyte Functional Materials Hebei Province, Qinhuangdao, 066004, People’s Republic of China

    Boyu Wang, Xiaoqiang Wang, Mingya Li, Junfei Hou & Renfu Zhang

  3. School of Natural Resources and Materials Science, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, People’s Republic of China

    Xiaoqiang Wang & Mingya Li

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  1. Boyu Wang
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Correspondence to Xiaoqiang Wang.

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Wang, B., Wang, X., Li, M. et al. Study on the optical properties and electrochromic applications of LTO/TaOx ion storage-transport composite structure films. Ionics 24, 3995–4003 (2018). https://doi.org/10.1007/s11581-018-2557-8

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